OpenGL入门笔记(六)
2007-04-19 20:58
357 查看
其实纹理滤波是什么概念我也还不了解,图形学就是这样,理论和实践都不可偏废,可究竟从何处入手也是个两难的问题,有人说“图形血到最后就是数学”,对我这样的新手来说,快速有个概念也许不失为一个笨办法吧。
Nehe在第6课里已经用了线性滤波了,并且还推荐我们把gl_nearest(不光滑)滤波方式和线性滤波结合起来使用,在近处时用线性滤波,在远处时用gl_nearest(不光滑)滤波,因为线性滤波对运行机器的要求高些。
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Demo7
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#include <windows.h> // Header File For Windows
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#include <stdio.h> // Header File For Standard Input/Output
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#include <gl/gl.h> // Header File For The OpenGL32 Library
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#include <gl/glu.h> // Header File For The GLu32 Library
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#include <gl/glaux.h> // Header File For The Glaux Library
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HDC hDC=NULL; // Private GDI Device Context
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HGLRC hRC=NULL; // Permanent Rendering Context
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HWND hWnd=NULL; // Holds Our Window Handle
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HINSTANCE hInstance; // Holds The Instance Of The Application
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bool keys[256]; // Array Used For The Keyboard Routine
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bool active=TRUE; // Window Active Flag Set To TRUE By Default
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bool fullscreen=TRUE; // Fullscreen Flag Set To Fullscreen Mode By Default
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bool light; // Lighting ON/OFF ( NEW )
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bool lp; // L Pressed? ( NEW )
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bool fp; // F Pressed? ( NEW )
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GLfloat xrot; // X Rotation
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GLfloat yrot; // Y Rotation
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GLfloat xspeed; // X Rotation Speed
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GLfloat yspeed; // Y Rotation Speed
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GLfloat z=-5.0f; // Depth Into The Screen
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GLfloat LightAmbient[]=
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{ 0.5f, 0.5f, 0.5f, 1.0f };
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GLfloat LightDiffuse[]=
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{ 1.0f, 1.0f, 1.0f, 1.0f };
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GLfloat LightPosition[]=
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{ 0.0f, 0.0f, 2.0f, 1.0f };
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GLuint filter; // Which Filter To Use
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GLuint texture[3]; // Storage For 3 Textures
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LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); // Declaration For WndProc
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AUX_RGBImageRec *LoadBMP(char *Filename) // Loads A Bitmap Image
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{
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FILE *File=NULL; // File Handle
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if (!Filename) // Make Sure A Filename Was Given
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{
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return NULL; // If Not Return NULL
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}
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File=fopen(Filename,"r"); // Check To See If The File Exists
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if (File) // Does The File Exist?
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{
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fclose(File); // Close The Handle
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return auxDIBImageLoad(Filename); // Load The Bitmap And Return A Pointer
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}
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return NULL; // If Load Failed Return NULL
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}
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int LoadGLTextures() // Load Bitmaps And Convert To Textures
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{
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int Status=FALSE; // Status Indicator
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AUX_RGBImageRec *TextureImage[1]; // Create Storage Space For The Texture
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memset(TextureImage,0,sizeof(void *)*1); // Set The Pointer To NULL
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// Load The Bitmap, Check For Errors, If Bitmap's Not Found Quit
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if (TextureImage[0]=LoadBMP("Data/Crate.bmp"))
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{
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Status=TRUE; // Set The Status To TRUE
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glGenTextures(3, &texture[0]); // Create Three Textures
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// Create Nearest Filtered Texture
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glBindTexture(GL_TEXTURE_2D, texture[0]);
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glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
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glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
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// Create Linear Filtered Texture
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glBindTexture(GL_TEXTURE_2D, texture[1]);
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glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
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glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
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// Create MipMapped Texture
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glBindTexture(GL_TEXTURE_2D, texture[2]);
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glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
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gluBuild2DMipmaps(GL_TEXTURE_2D, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
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}
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if (TextureImage[0]) // If Texture Exists
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{
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if (TextureImage[0]->data) // If Texture Image Exists
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{
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free(TextureImage[0]->data); // Free The Texture Image Memory
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}
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free(TextureImage[0]); // Free The Image Structure
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}
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return Status; // Return The Status
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}
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GLvoid ReSizeGLScene(GLsizei width, GLsizei height) // Resize And Initialize The GL Window
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{
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if (height==0) // Prevent A Divide By Zero By
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{
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height=1; // Making Height Equal One
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}
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glViewport(0,0,width,height); // Reset The Current Viewport
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glMatrixMode(GL_PROJECTION); // Select The Projection Matrix
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glLoadIdentity(); // Reset The Projection Matrix
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// Calculate The Aspect Ratio Of The Window
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gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);
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glMatrixMode(GL_MODELVIEW); // Select The Modelview Matrix
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glLoadIdentity(); // Reset The Modelview Matrix
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}
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int InitGL(GLvoid) // All Setup For OpenGL Goes Here
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{
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if (!LoadGLTextures()) // Jump To Texture Loading Routine
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{
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return FALSE; // If Texture Didn't Load Return FALSE
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}
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glEnable(GL_TEXTURE_2D); // Enable Texture Mapping
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glShadeModel(GL_SMOOTH); // Enable Smooth Shading
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glClearColor(0.0f, 0.0f, 0.0f, 0.5f); // Black Background
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glClearDepth(1.0f); // Depth Buffer Setup
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glEnable(GL_DEPTH_TEST); // Enables Depth Testing
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glDepthFunc(GL_LEQUAL); // The Type Of Depth Testing To Do
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glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Really Nice Perspective Calculations
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glLightfv(GL_LIGHT1, GL_AMBIENT, LightAmbient); // Setup The Ambient Light
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glLightfv(GL_LIGHT1, GL_DIFFUSE, LightDiffuse); // Setup The Diffuse Light
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glLightfv(GL_LIGHT1, GL_POSITION,LightPosition); // Position The Light
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glEnable(GL_LIGHT1); // Enable Light One
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return TRUE; // Initialization Went OK
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}
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int DrawGLScene(GLvoid) // Here's Where We Do All The Drawing
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{
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
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glLoadIdentity(); // Reset The View
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glTranslatef(0.0f,0.0f,z);
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glRotatef(xrot,1.0f,0.0f,0.0f);
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glRotatef(yrot,0.0f,1.0f,0.0f);
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glBindTexture(GL_TEXTURE_2D, texture[filter]);
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glBegin(GL_QUADS);
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// Front Face
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glNormal3f( 0.0f, 0.0f, 1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
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// Back Face
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glNormal3f( 0.0f, 0.0f,-1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
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// Top Face
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glNormal3f( 0.0f, 1.0f, 0.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
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// Bottom Face
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glNormal3f( 0.0f,-1.0f, 0.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Right face
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glNormal3f( 1.0f, 0.0f, 0.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Left Face
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glNormal3f(-1.0f, 0.0f, 0.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glEnd();
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
xrot+=xspeed;
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
yrot+=yspeed;
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return TRUE; // Keep Going
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
GLvoid KillGLWindow(GLvoid) // Properly Kill The Window
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (fullscreen) // Are We In Fullscreen Mode?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
ChangeDisplaySettings(NULL,0); // If So Switch Back To The Desktop
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
ShowCursor(TRUE); // Show Mouse Pointer
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (hRC) // Do We Have A Rendering Context?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!wglMakeCurrent(NULL,NULL)) // Are We Able To Release The DC And RC Contexts?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Release Of DC And RC Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!wglDeleteContext(hRC)) // Are We Able To Delete The RC?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Release Rendering Context Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
hRC=NULL; // Set RC To NULL
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (hDC && !ReleaseDC(hWnd,hDC)) // Are We Able To Release The DC
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Release Device Context Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
hDC=NULL; // Set DC To NULL
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (hWnd && !DestroyWindow(hWnd)) // Are We Able To Destroy The Window?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Could Not Release hWnd.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
hWnd=NULL; // Set hWnd To NULL
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!UnregisterClass("OpenGL",hInstance)) // Are We Able To Unregister Class
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Could Not Unregister Class.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
hInstance=NULL; // Set hInstance To NULL
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
/**//* This Code Creates Our OpenGL Window. Parameters Are: *
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
* title - Title To Appear At The Top Of The Window *
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
* width - Width Of The GL Window Or Fullscreen Mode *
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
* height - Height Of The GL Window Or Fullscreen Mode *
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
* bits - Number Of Bits To Use For Color (8/16/24/32) *
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
* fullscreenflag - Use Fullscreen Mode (TRUE) Or Windowed Mode (FALSE) */
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
BOOL CreateGLWindow(char* title, int width, int height, int bits, bool fullscreenflag)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
GLuint PixelFormat; // Holds The Results After Searching For A Match
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WNDCLASS wc; // Windows Class Structure
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
DWORD dwExStyle; // Window Extended Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
DWORD dwStyle; // Window Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
RECT WindowRect; // Grabs Rectangle Upper Left / Lower Right Values
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WindowRect.left=(long)0; // Set Left Value To 0
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WindowRect.right=(long)width; // Set Right Value To Requested Width
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WindowRect.top=(long)0; // Set Top Value To 0
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WindowRect.bottom=(long)height; // Set Bottom Value To Requested Height
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
fullscreen=fullscreenflag; // Set The Global Fullscreen Flag
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
hInstance = GetModuleHandle(NULL); // Grab An Instance For Our Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; // Redraw On Size, And Own DC For Window.
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.lpfnWndProc = (WNDPROC) WndProc; // WndProc Handles Messages
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.cbClsExtra = 0; // No Extra Window Data
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.cbWndExtra = 0; // No Extra Window Data
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.hInstance = hInstance; // Set The Instance
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.hIcon = LoadIcon(NULL, IDI_WINLOGO); // Load The Default Icon
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.hCursor = LoadCursor(NULL, IDC_ARROW); // Load The Arrow Pointer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.hbrBackground = NULL; // No Background Required For GL
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.lpszMenuName = NULL; // We Don't Want A Menu
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.lpszClassName = "OpenGL"; // Set The Class Name
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!RegisterClass(&wc)) // Attempt To Register The Window Class
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Failed To Register The Window Class.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (fullscreen) // Attempt Fullscreen Mode?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
DEVMODE dmScreenSettings; // Device Mode
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
memset(&dmScreenSettings,0,sizeof(dmScreenSettings)); // Makes Sure Memory's Cleared
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dmScreenSettings.dmSize=sizeof(dmScreenSettings); // Size Of The Devmode Structure
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dmScreenSettings.dmPelsWidth = width; // Selected Screen Width
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dmScreenSettings.dmPelsHeight = height; // Selected Screen Height
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dmScreenSettings.dmBitsPerPel = bits; // Selected Bits Per Pixel
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dmScreenSettings.dmFields=DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Try To Set Selected Mode And Get Results. NOTE: CDS_FULLSCREEN Gets Rid Of Start Bar.
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN)!=DISP_CHANGE_SUCCESSFUL)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// If The Mode Fails, Offer Two Options. Quit Or Use Windowed Mode.
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (MessageBox(NULL,"The Requested Fullscreen Mode Is Not Supported By/nYour Video Card. Use Windowed Mode Instead?","NeHe GL",MB_YESNO|MB_ICONEXCLAMATION)==IDYES)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
fullscreen=FALSE; // Windowed Mode Selected. Fullscreen = FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
else
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Pop Up A Message Box Letting User Know The Program Is Closing.
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Program Will Now Close.","ERROR",MB_OK|MB_ICONSTOP);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (fullscreen) // Are We Still In Fullscreen Mode?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dwExStyle=WS_EX_APPWINDOW; // Window Extended Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dwStyle=WS_POPUP; // Windows Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
ShowCursor(FALSE); // Hide Mouse Pointer
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
else
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dwExStyle=WS_EX_APPWINDOW | WS_EX_WINDOWEDGE; // Window Extended Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dwStyle=WS_OVERLAPPEDWINDOW; // Windows Style
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle); // Adjust Window To True Requested Size
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Create The Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!(hWnd=CreateWindowEx( dwExStyle, // Extended Style For The Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
"OpenGL", // Class Name
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
title, // Window Title
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dwStyle | // Defined Window Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WS_CLIPSIBLINGS | // Required Window Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WS_CLIPCHILDREN, // Required Window Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, 0, // Window Position
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WindowRect.right-WindowRect.left, // Calculate Window Width
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WindowRect.bottom-WindowRect.top, // Calculate Window Height
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
NULL, // No Parent Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
NULL, // No Menu
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
hInstance, // Instance
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
NULL))) // Dont Pass Anything To WM_CREATE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Window Creation Error.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
static PIXELFORMATDESCRIPTOR pfd= // pfd Tells Windows How We Want Things To Be
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
sizeof(PIXELFORMATDESCRIPTOR), // Size Of This Pixel Format Descriptor
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
1, // Version Number
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
PFD_DRAW_TO_WINDOW | // Format Must Support Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
PFD_SUPPORT_OPENGL | // Format Must Support OpenGL
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
PFD_DOUBLEBUFFER, // Must Support Double Buffering
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
PFD_TYPE_RGBA, // Request An RGBA Format
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
bits, // Select Our Color Depth
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, 0, 0, 0, 0, 0, // Color Bits Ignored
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, // No Alpha Buffer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, // Shift Bit Ignored
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, // No Accumulation Buffer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, 0, 0, 0, // Accumulation Bits Ignored
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
16, // 16Bit Z-Buffer (Depth Buffer)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, // No Stencil Buffer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, // No Auxiliary Buffer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
PFD_MAIN_PLANE, // Main Drawing Layer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, // Reserved
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, 0, 0 // Layer Masks Ignored
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
};
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!(hDC=GetDC(hWnd))) // Did We Get A Device Context?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Can't Create A GL Device Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!(PixelFormat=ChoosePixelFormat(hDC,&pfd))) // Did Windows Find A Matching Pixel Format?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Can't Find A Suitable PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if(!SetPixelFormat(hDC,PixelFormat,&pfd)) // Are We Able To Set The Pixel Format?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Can't Set The PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!(hRC=wglCreateContext(hDC))) // Are We Able To Get A Rendering Context?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Can't Create A GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if(!wglMakeCurrent(hDC,hRC)) // Try To Activate The Rendering Context
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Can't Activate The GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
ShowWindow(hWnd,SW_SHOW); // Show The Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
SetForegroundWindow(hWnd); // Slightly Higher Priority
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
SetFocus(hWnd); // Sets Keyboard Focus To The Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
ReSizeGLScene(width, height); // Set Up Our Perspective GL Screen
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!InitGL()) // Initialize Our Newly Created GL Window
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Initialization Failed.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return TRUE; // Success
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
LRESULT CALLBACK WndProc( HWND hWnd, // Handle For This Window
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
UINT uMsg, // Message For This Window
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
WPARAM wParam, // Additional Message Information
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
LPARAM lParam) // Additional Message Information
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
switch (uMsg) // Check For Windows Messages
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case WM_ACTIVATE: // Watch For Window Activate Message
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!HIWORD(wParam)) // Check Minimization State
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
active=TRUE; // Program Is Active
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
else
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
active=FALSE; // Program Is No Longer Active
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Return To The Message Loop
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case WM_SYSCOMMAND: // Intercept System Commands
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
switch (wParam) // Check System Calls
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case SC_SCREENS***E: // Screensaver Trying To Start?
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case SC_MONITORPOWER: // Monitor Trying To Enter Powersave?
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Prevent From Happening
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
break; // Exit
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case WM_CLOSE: // Did We Receive A Close Message?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
PostQuitMessage(0); // Send A Quit Message
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Jump Back
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case WM_KEYDOWN: // Is A Key Being Held Down?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
keys[wParam] = TRUE; // If So, Mark It As TRUE
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Jump Back
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case WM_KEYUP: // Has A Key Been Released?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
keys[wParam] = FALSE; // If So, Mark It As FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Jump Back
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case WM_SIZE: // Resize The OpenGL Window
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
ReSizeGLScene(LOWORD(lParam),HIWORD(lParam)); // LoWord=Width, HiWord=Height
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Jump Back
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Pass All Unhandled Messages To DefWindowProc
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return DefWindowProc(hWnd,uMsg,wParam,lParam);
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
int WINAPI WinMain( HINSTANCE hInstance, // Instance
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
HINSTANCE hPrevInstance, // Previous Instance
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
LPSTR lpCmdLine, // Command Line Parameters
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
int nCmdShow) // Window Show State
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MSG msg; // Windows Message Structure
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
BOOL done=FALSE; // Bool Variable To Exit Loop
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Ask The User Which Screen Mode They Prefer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (MessageBox(NULL,"Would You Like To Run In Fullscreen Mode?", "Start FullScreen?",MB_YESNO|MB_ICONQUESTION)==IDNO)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
fullscreen=FALSE; // Windowed Mode
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Create Our OpenGL Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!CreateGLWindow("NeHe's Textures, Lighting & Keyboard Tutorial",640,480,16,fullscreen))
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Quit If Window Was Not Created
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
while(!done) // Loop That Runs While done=FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (PeekMessage(&msg,NULL,0,0,PM_REMOVE)) // Is There A Message Waiting?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (msg.message==WM_QUIT) // Have We Received A Quit Message?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
done=TRUE; // If So done=TRUE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
else // If Not, Deal With Window Messages
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
TranslateMessage(&msg); // Translate The Message
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
DispatchMessage(&msg); // Dispatch The Message
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
else // If There Are No Messages
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Draw The Scene. Watch For ESC Key And Quit Messages From DrawGLScene()
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if ((active && !DrawGLScene()) || keys[VK_ESCAPE]) // Active? Was There A Quit Received?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
done=TRUE; // ESC or DrawGLScene Signalled A Quit
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
else // Not Time To Quit, Update Screen
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
SwapBuffers(hDC); // Swap Buffers (Double Buffering)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (keys['L'] && !lp)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
lp=TRUE;
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
light=!light;
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!light)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glDisable(GL_LIGHTING);
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
else
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glEnable(GL_LIGHTING);
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!keys['L'])
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
lp=FALSE;
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (keys['F'] && !fp)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
fp=TRUE;
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
filter+=1;
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (filter>2)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
filter=0;
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!keys['F'])
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
fp=FALSE;
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (keys[VK_PRIOR])
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
z-=0.02f;
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (keys[VK_NEXT])
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
z+=0.02f;
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (keys[VK_UP])
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
xspeed-=0.01f;
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (keys[VK_DOWN])
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
xspeed+=0.01f;
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (keys[VK_RIGHT])
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
yspeed+=0.01f;
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (keys[VK_LEFT])
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
yspeed-=0.01f;
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (keys[VK_F1]) // Is F1 Being Pressed?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
keys[VK_F1]=FALSE; // If So Make Key FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Kill Our Current Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
fullscreen=!fullscreen; // Toggle Fullscreen / Windowed Mode
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Recreate Our OpenGL Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!CreateGLWindow("NeHe's Textures, Lighting & Keyboard Tutorial",640,480,16,fullscreen))
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Quit If Window Was Not Created
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Shutdown
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Kill The Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return (msg.wParam); // Exit The Program
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
这一课里还讲解了如何使用光照。他使用了两种不同的光。第一种称为环境光。环境光来自于四面八方。所有场景中的对象都处于环境光的照射中。第二种类型的光源叫做漫射光。漫射光由特定的光源产生,并在您的场景中的对象表面上产生反射。处于漫射光直接照射下的任何对象表面都变得很亮,而几乎未被照射到的区域就显得要暗一些。创建光源的过程和颜色的创建完全一致,先设置用来创建光源的数组。前三个参数分别是RGB三色分量,最后一个是alpha通道参数。
GLfloat LightAmbient[]= { 0.5f, 0.5f, 0.5f, 1.0f }; // 环境光参数
GLfloat LightDiffuse[]= { 1.0f, 1.0f, 1.0f, 1.0f }; // 漫射光参数
最后保存光源的位置。前三个参数和glTranslate中的一样。依次分别是XYZ轴上的位移。最后一个参数取为1.0f。这将告诉OpenGL这里指定的坐标就是光源的位置。
GLfloat LightPosition[]= { 0.0f, 0.0f, 2.0f, 1.0f }; // 光源位置
教程里使用三种纹理滤波方式,第一种纹理(texture 0)使用gl_nearest(不光滑)滤波方式构建。第二种纹理(texture 1)使用gl_linear(线性滤波)方式,离屏幕越近的图像看起来就越光滑。第三种纹理 (texture 2)使用mipmapped滤波方式,这将创建一个外观十分优秀的纹理。
下面是创建纹理的新方法:Mip-mapping(纹理细化)。您可能会注意到当图像在屏幕上变得很小的时候,很多细节将会丢失。刚才还很不错的图案变得很难看。当您告诉OpenGL创建一个mipmapped的纹理后,OpenGL将尝试创建不同尺寸的高质量纹理。当您向屏幕绘制一个mipmapped纹理的时候,OpenGL将选择它已经创建的外观最佳的纹理(带有更多细节)来绘制,而不仅仅是缩放原先的图像(这将导致细节丢失)。
要绕过OpenGL对纹理宽度和高度所加的限制 (64、128、256等等)。办法就是 gluBuild2DMipmaps,我们可以使用任意的位图来创建纹理。OpenGL将自动将它缩放到正常的大小。
// 创建 MipMapped 纹理
glBindTexture(GL_TEXTURE_2D, texture[2]);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
下面生成mipmapped纹理。我们使用三种颜色(红,绿,蓝)来生成一个2D纹理。TextureImage[0]->sizeX 是位图宽度,extureImage[0]->sizeY是位图高度,GL_RGB意味着我们依次使用RGB色彩。GL_UNSIGNED_BYTE意味着纹理数据的单位是字节。TextureImage[0]->data指向我们创建纹理所用的位图。
gluBuild2DMipmaps(GL_TEXTURE_2D, 3,
TextureImage[0]->sizeX, TextureImage[0]->sizeY,
GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
现在开始设置光源。下面一行设置环境光的发光量,光源light1开始发光:
glLightfv(GL_LIGHT1, GL_AMBIENT, LightAmbient); // 设置环境光
设置漫射光的发光量:
glLightfv(GL_LIGHT1, GL_DIFFUSE, LightDiffuse); // 设置漫射光
然后设置光源的位置:
glLightfv(GL_LIGHT1, GL_POSITION,LightPosition); // 光源位置
最后,我们启用一号光源,没有启用GL_LIGHTING,所以您看不见任何光线(只对光源进行设置、定位、甚至启用,光源都不会工作。除非我们启用GL_LIGHTING)。
glEnable(GL_LIGHT1); // 启用一号光源
课程中还学习了一个新的函数glNormal3f。Normal就是法线的意思,所谓法线是指经过面(多边形)上的一点且垂直于这个面(多边形)的直线。使用光源的时候必须指定一条法线。法线告诉OpenGL这个多边形的朝向,并指明多边形的正面和背面。如果没有指定法线,什么怪事情都可能发生。
Nehe在第6课里已经用了线性滤波了,并且还推荐我们把gl_nearest(不光滑)滤波方式和线性滤波结合起来使用,在近处时用线性滤波,在远处时用gl_nearest(不光滑)滤波,因为线性滤波对运行机器的要求高些。
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
Demo7
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
#include <windows.h> // Header File For Windows
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
#include <stdio.h> // Header File For Standard Input/Output
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
#include <gl/gl.h> // Header File For The OpenGL32 Library
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
#include <gl/glu.h> // Header File For The GLu32 Library
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
#include <gl/glaux.h> // Header File For The Glaux Library
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
HDC hDC=NULL; // Private GDI Device Context
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
HGLRC hRC=NULL; // Permanent Rendering Context
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
HWND hWnd=NULL; // Holds Our Window Handle
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
HINSTANCE hInstance; // Holds The Instance Of The Application
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
bool keys[256]; // Array Used For The Keyboard Routine
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
bool active=TRUE; // Window Active Flag Set To TRUE By Default
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
bool fullscreen=TRUE; // Fullscreen Flag Set To Fullscreen Mode By Default
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
bool light; // Lighting ON/OFF ( NEW )
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
bool lp; // L Pressed? ( NEW )
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
bool fp; // F Pressed? ( NEW )
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
GLfloat xrot; // X Rotation
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
GLfloat yrot; // Y Rotation
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
GLfloat xspeed; // X Rotation Speed
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
GLfloat yspeed; // Y Rotation Speed
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
GLfloat z=-5.0f; // Depth Into The Screen
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
GLfloat LightAmbient[]=
![](http://blog.csdn.net/Images/dot.gif)
{ 0.5f, 0.5f, 0.5f, 1.0f };
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
GLfloat LightDiffuse[]=
![](http://blog.csdn.net/Images/dot.gif)
{ 1.0f, 1.0f, 1.0f, 1.0f };
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
GLfloat LightPosition[]=
![](http://blog.csdn.net/Images/dot.gif)
{ 0.0f, 0.0f, 2.0f, 1.0f };
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
GLuint filter; // Which Filter To Use
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
GLuint texture[3]; // Storage For 3 Textures
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); // Declaration For WndProc
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
AUX_RGBImageRec *LoadBMP(char *Filename) // Loads A Bitmap Image
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
FILE *File=NULL; // File Handle
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!Filename) // Make Sure A Filename Was Given
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return NULL; // If Not Return NULL
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
File=fopen(Filename,"r"); // Check To See If The File Exists
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (File) // Does The File Exist?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
fclose(File); // Close The Handle
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return auxDIBImageLoad(Filename); // Load The Bitmap And Return A Pointer
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return NULL; // If Load Failed Return NULL
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
int LoadGLTextures() // Load Bitmaps And Convert To Textures
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
int Status=FALSE; // Status Indicator
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
AUX_RGBImageRec *TextureImage[1]; // Create Storage Space For The Texture
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
memset(TextureImage,0,sizeof(void *)*1); // Set The Pointer To NULL
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Load The Bitmap, Check For Errors, If Bitmap's Not Found Quit
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (TextureImage[0]=LoadBMP("Data/Crate.bmp"))
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
Status=TRUE; // Set The Status To TRUE
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glGenTextures(3, &texture[0]); // Create Three Textures
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Create Nearest Filtered Texture
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glBindTexture(GL_TEXTURE_2D, texture[0]);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Create Linear Filtered Texture
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glBindTexture(GL_TEXTURE_2D, texture[1]);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Create MipMapped Texture
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glBindTexture(GL_TEXTURE_2D, texture[2]);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
gluBuild2DMipmaps(GL_TEXTURE_2D, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (TextureImage[0]) // If Texture Exists
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (TextureImage[0]->data) // If Texture Image Exists
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
free(TextureImage[0]->data); // Free The Texture Image Memory
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
free(TextureImage[0]); // Free The Image Structure
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return Status; // Return The Status
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
GLvoid ReSizeGLScene(GLsizei width, GLsizei height) // Resize And Initialize The GL Window
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (height==0) // Prevent A Divide By Zero By
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
height=1; // Making Height Equal One
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glViewport(0,0,width,height); // Reset The Current Viewport
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glMatrixMode(GL_PROJECTION); // Select The Projection Matrix
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glLoadIdentity(); // Reset The Projection Matrix
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Calculate The Aspect Ratio Of The Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glMatrixMode(GL_MODELVIEW); // Select The Modelview Matrix
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glLoadIdentity(); // Reset The Modelview Matrix
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
int InitGL(GLvoid) // All Setup For OpenGL Goes Here
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!LoadGLTextures()) // Jump To Texture Loading Routine
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // If Texture Didn't Load Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glEnable(GL_TEXTURE_2D); // Enable Texture Mapping
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glShadeModel(GL_SMOOTH); // Enable Smooth Shading
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glClearColor(0.0f, 0.0f, 0.0f, 0.5f); // Black Background
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glClearDepth(1.0f); // Depth Buffer Setup
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glEnable(GL_DEPTH_TEST); // Enables Depth Testing
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glDepthFunc(GL_LEQUAL); // The Type Of Depth Testing To Do
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Really Nice Perspective Calculations
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glLightfv(GL_LIGHT1, GL_AMBIENT, LightAmbient); // Setup The Ambient Light
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glLightfv(GL_LIGHT1, GL_DIFFUSE, LightDiffuse); // Setup The Diffuse Light
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glLightfv(GL_LIGHT1, GL_POSITION,LightPosition); // Position The Light
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glEnable(GL_LIGHT1); // Enable Light One
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return TRUE; // Initialization Went OK
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
int DrawGLScene(GLvoid) // Here's Where We Do All The Drawing
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glLoadIdentity(); // Reset The View
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTranslatef(0.0f,0.0f,z);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glRotatef(xrot,1.0f,0.0f,0.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glRotatef(yrot,0.0f,1.0f,0.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glBindTexture(GL_TEXTURE_2D, texture[filter]);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glBegin(GL_QUADS);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Front Face
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glNormal3f( 0.0f, 0.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Back Face
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glNormal3f( 0.0f, 0.0f,-1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Top Face
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glNormal3f( 0.0f, 1.0f, 0.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Bottom Face
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glNormal3f( 0.0f,-1.0f, 0.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Right face
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glNormal3f( 1.0f, 0.0f, 0.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Left Face
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glNormal3f(-1.0f, 0.0f, 0.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
glEnd();
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
xrot+=xspeed;
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
yrot+=yspeed;
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return TRUE; // Keep Going
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
GLvoid KillGLWindow(GLvoid) // Properly Kill The Window
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (fullscreen) // Are We In Fullscreen Mode?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
ChangeDisplaySettings(NULL,0); // If So Switch Back To The Desktop
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
ShowCursor(TRUE); // Show Mouse Pointer
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (hRC) // Do We Have A Rendering Context?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!wglMakeCurrent(NULL,NULL)) // Are We Able To Release The DC And RC Contexts?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Release Of DC And RC Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!wglDeleteContext(hRC)) // Are We Able To Delete The RC?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Release Rendering Context Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
hRC=NULL; // Set RC To NULL
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (hDC && !ReleaseDC(hWnd,hDC)) // Are We Able To Release The DC
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Release Device Context Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
hDC=NULL; // Set DC To NULL
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (hWnd && !DestroyWindow(hWnd)) // Are We Able To Destroy The Window?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Could Not Release hWnd.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
hWnd=NULL; // Set hWnd To NULL
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!UnregisterClass("OpenGL",hInstance)) // Are We Able To Unregister Class
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Could Not Unregister Class.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
hInstance=NULL; // Set hInstance To NULL
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
/**//* This Code Creates Our OpenGL Window. Parameters Are: *
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
* title - Title To Appear At The Top Of The Window *
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
* width - Width Of The GL Window Or Fullscreen Mode *
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
* height - Height Of The GL Window Or Fullscreen Mode *
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
* bits - Number Of Bits To Use For Color (8/16/24/32) *
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
* fullscreenflag - Use Fullscreen Mode (TRUE) Or Windowed Mode (FALSE) */
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
BOOL CreateGLWindow(char* title, int width, int height, int bits, bool fullscreenflag)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
GLuint PixelFormat; // Holds The Results After Searching For A Match
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WNDCLASS wc; // Windows Class Structure
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
DWORD dwExStyle; // Window Extended Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
DWORD dwStyle; // Window Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
RECT WindowRect; // Grabs Rectangle Upper Left / Lower Right Values
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WindowRect.left=(long)0; // Set Left Value To 0
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WindowRect.right=(long)width; // Set Right Value To Requested Width
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WindowRect.top=(long)0; // Set Top Value To 0
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WindowRect.bottom=(long)height; // Set Bottom Value To Requested Height
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
fullscreen=fullscreenflag; // Set The Global Fullscreen Flag
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
hInstance = GetModuleHandle(NULL); // Grab An Instance For Our Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; // Redraw On Size, And Own DC For Window.
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.lpfnWndProc = (WNDPROC) WndProc; // WndProc Handles Messages
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.cbClsExtra = 0; // No Extra Window Data
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.cbWndExtra = 0; // No Extra Window Data
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.hInstance = hInstance; // Set The Instance
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.hIcon = LoadIcon(NULL, IDI_WINLOGO); // Load The Default Icon
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.hCursor = LoadCursor(NULL, IDC_ARROW); // Load The Arrow Pointer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.hbrBackground = NULL; // No Background Required For GL
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.lpszMenuName = NULL; // We Don't Want A Menu
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
wc.lpszClassName = "OpenGL"; // Set The Class Name
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!RegisterClass(&wc)) // Attempt To Register The Window Class
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Failed To Register The Window Class.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (fullscreen) // Attempt Fullscreen Mode?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
DEVMODE dmScreenSettings; // Device Mode
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
memset(&dmScreenSettings,0,sizeof(dmScreenSettings)); // Makes Sure Memory's Cleared
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dmScreenSettings.dmSize=sizeof(dmScreenSettings); // Size Of The Devmode Structure
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dmScreenSettings.dmPelsWidth = width; // Selected Screen Width
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dmScreenSettings.dmPelsHeight = height; // Selected Screen Height
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dmScreenSettings.dmBitsPerPel = bits; // Selected Bits Per Pixel
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dmScreenSettings.dmFields=DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Try To Set Selected Mode And Get Results. NOTE: CDS_FULLSCREEN Gets Rid Of Start Bar.
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN)!=DISP_CHANGE_SUCCESSFUL)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// If The Mode Fails, Offer Two Options. Quit Or Use Windowed Mode.
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (MessageBox(NULL,"The Requested Fullscreen Mode Is Not Supported By/nYour Video Card. Use Windowed Mode Instead?","NeHe GL",MB_YESNO|MB_ICONEXCLAMATION)==IDYES)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
fullscreen=FALSE; // Windowed Mode Selected. Fullscreen = FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
else
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Pop Up A Message Box Letting User Know The Program Is Closing.
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Program Will Now Close.","ERROR",MB_OK|MB_ICONSTOP);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (fullscreen) // Are We Still In Fullscreen Mode?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dwExStyle=WS_EX_APPWINDOW; // Window Extended Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dwStyle=WS_POPUP; // Windows Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
ShowCursor(FALSE); // Hide Mouse Pointer
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
else
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dwExStyle=WS_EX_APPWINDOW | WS_EX_WINDOWEDGE; // Window Extended Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dwStyle=WS_OVERLAPPEDWINDOW; // Windows Style
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle); // Adjust Window To True Requested Size
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Create The Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!(hWnd=CreateWindowEx( dwExStyle, // Extended Style For The Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
"OpenGL", // Class Name
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
title, // Window Title
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
dwStyle | // Defined Window Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WS_CLIPSIBLINGS | // Required Window Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WS_CLIPCHILDREN, // Required Window Style
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, 0, // Window Position
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WindowRect.right-WindowRect.left, // Calculate Window Width
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
WindowRect.bottom-WindowRect.top, // Calculate Window Height
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
NULL, // No Parent Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
NULL, // No Menu
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
hInstance, // Instance
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
NULL))) // Dont Pass Anything To WM_CREATE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Window Creation Error.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
static PIXELFORMATDESCRIPTOR pfd= // pfd Tells Windows How We Want Things To Be
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
sizeof(PIXELFORMATDESCRIPTOR), // Size Of This Pixel Format Descriptor
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
1, // Version Number
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
PFD_DRAW_TO_WINDOW | // Format Must Support Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
PFD_SUPPORT_OPENGL | // Format Must Support OpenGL
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
PFD_DOUBLEBUFFER, // Must Support Double Buffering
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
PFD_TYPE_RGBA, // Request An RGBA Format
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
bits, // Select Our Color Depth
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, 0, 0, 0, 0, 0, // Color Bits Ignored
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, // No Alpha Buffer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, // Shift Bit Ignored
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, // No Accumulation Buffer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, 0, 0, 0, // Accumulation Bits Ignored
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
16, // 16Bit Z-Buffer (Depth Buffer)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, // No Stencil Buffer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, // No Auxiliary Buffer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
PFD_MAIN_PLANE, // Main Drawing Layer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, // Reserved
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
0, 0, 0 // Layer Masks Ignored
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
};
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!(hDC=GetDC(hWnd))) // Did We Get A Device Context?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Can't Create A GL Device Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!(PixelFormat=ChoosePixelFormat(hDC,&pfd))) // Did Windows Find A Matching Pixel Format?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Can't Find A Suitable PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if(!SetPixelFormat(hDC,PixelFormat,&pfd)) // Are We Able To Set The Pixel Format?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Can't Set The PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!(hRC=wglCreateContext(hDC))) // Are We Able To Get A Rendering Context?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Can't Create A GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if(!wglMakeCurrent(hDC,hRC)) // Try To Activate The Rendering Context
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Can't Activate The GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
ShowWindow(hWnd,SW_SHOW); // Show The Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
SetForegroundWindow(hWnd); // Slightly Higher Priority
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
SetFocus(hWnd); // Sets Keyboard Focus To The Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
ReSizeGLScene(width, height); // Set Up Our Perspective GL Screen
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!InitGL()) // Initialize Our Newly Created GL Window
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
KillGLWindow(); // Reset The Display
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MessageBox(NULL,"Initialization Failed.","ERROR",MB_OK|MB_ICONEXCLAMATION);
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return FALSE; // Return FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return TRUE; // Success
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
LRESULT CALLBACK WndProc( HWND hWnd, // Handle For This Window
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
UINT uMsg, // Message For This Window
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
WPARAM wParam, // Additional Message Information
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
LPARAM lParam) // Additional Message Information
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
switch (uMsg) // Check For Windows Messages
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case WM_ACTIVATE: // Watch For Window Activate Message
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!HIWORD(wParam)) // Check Minimization State
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
active=TRUE; // Program Is Active
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
else
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
active=FALSE; // Program Is No Longer Active
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Return To The Message Loop
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case WM_SYSCOMMAND: // Intercept System Commands
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
switch (wParam) // Check System Calls
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case SC_SCREENS***E: // Screensaver Trying To Start?
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case SC_MONITORPOWER: // Monitor Trying To Enter Powersave?
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Prevent From Happening
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
break; // Exit
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case WM_CLOSE: // Did We Receive A Close Message?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
PostQuitMessage(0); // Send A Quit Message
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Jump Back
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case WM_KEYDOWN: // Is A Key Being Held Down?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
keys[wParam] = TRUE; // If So, Mark It As TRUE
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Jump Back
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case WM_KEYUP: // Has A Key Been Released?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
keys[wParam] = FALSE; // If So, Mark It As FALSE
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Jump Back
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
case WM_SIZE: // Resize The OpenGL Window
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
ReSizeGLScene(LOWORD(lParam),HIWORD(lParam)); // LoWord=Width, HiWord=Height
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return 0; // Jump Back
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Pass All Unhandled Messages To DefWindowProc
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
return DefWindowProc(hWnd,uMsg,wParam,lParam);
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
int WINAPI WinMain( HINSTANCE hInstance, // Instance
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
HINSTANCE hPrevInstance, // Previous Instance
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
LPSTR lpCmdLine, // Command Line Parameters
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
int nCmdShow) // Window Show State
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
MSG msg; // Windows Message Structure
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
BOOL done=FALSE; // Bool Variable To Exit Loop
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Ask The User Which Screen Mode They Prefer
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (MessageBox(NULL,"Would You Like To Run In Fullscreen Mode?", "Start FullScreen?",MB_YESNO|MB_ICONQUESTION)==IDNO)
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://blog.csdn.net/Images/dot.gif)
{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
fullscreen=FALSE; // Windowed Mode
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
// Create Our OpenGL Window
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
if (!CreateGLWindow("NeHe's Textures, Lighting & Keyboard Tutorial",640,480,16,fullscreen))
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{
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return 0; // Quit If Window Was Not Created
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}
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while(!done) // Loop That Runs While done=FALSE
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{
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if (PeekMessage(&msg,NULL,0,0,PM_REMOVE)) // Is There A Message Waiting?
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{
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if (msg.message==WM_QUIT) // Have We Received A Quit Message?
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{
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done=TRUE; // If So done=TRUE
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}
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else // If Not, Deal With Window Messages
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{
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TranslateMessage(&msg); // Translate The Message
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DispatchMessage(&msg); // Dispatch The Message
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}
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}
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else // If There Are No Messages
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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{
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// Draw The Scene. Watch For ESC Key And Quit Messages From DrawGLScene()
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if ((active && !DrawGLScene()) || keys[VK_ESCAPE]) // Active? Was There A Quit Received?
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{
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done=TRUE; // ESC or DrawGLScene Signalled A Quit
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}
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else // Not Time To Quit, Update Screen
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{
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SwapBuffers(hDC); // Swap Buffers (Double Buffering)
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if (keys['L'] && !lp)
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{
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lp=TRUE;
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light=!light;
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if (!light)
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{
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glDisable(GL_LIGHTING);
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}
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else
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{
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glEnable(GL_LIGHTING);
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}
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}
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if (!keys['L'])
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{
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lp=FALSE;
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}
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if (keys['F'] && !fp)
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{
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fp=TRUE;
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filter+=1;
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if (filter>2)
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{
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filter=0;
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}
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}
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if (!keys['F'])
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{
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fp=FALSE;
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}
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if (keys[VK_PRIOR])
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{
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z-=0.02f;
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}
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if (keys[VK_NEXT])
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{
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z+=0.02f;
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}
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if (keys[VK_UP])
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{
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xspeed-=0.01f;
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}
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if (keys[VK_DOWN])
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{
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xspeed+=0.01f;
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}
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if (keys[VK_RIGHT])
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{
![](http://blog.csdn.net/Images/OutliningIndicators/InBlock.gif)
yspeed+=0.01f;
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}
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if (keys[VK_LEFT])
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{
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yspeed-=0.01f;
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}
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if (keys[VK_F1]) // Is F1 Being Pressed?
![](http://blog.csdn.net/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](http://blog.csdn.net/Images/dot.gif)
{
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keys[VK_F1]=FALSE; // If So Make Key FALSE
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KillGLWindow(); // Kill Our Current Window
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fullscreen=!fullscreen; // Toggle Fullscreen / Windowed Mode
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// Recreate Our OpenGL Window
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if (!CreateGLWindow("NeHe's Textures, Lighting & Keyboard Tutorial",640,480,16,fullscreen))
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{
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return 0; // Quit If Window Was Not Created
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}
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}
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}
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// Shutdown
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KillGLWindow(); // Kill The Window
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return (msg.wParam); // Exit The Program
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}
![](http://blog.csdn.net/Images/OutliningIndicators/None.gif)
这一课里还讲解了如何使用光照。他使用了两种不同的光。第一种称为环境光。环境光来自于四面八方。所有场景中的对象都处于环境光的照射中。第二种类型的光源叫做漫射光。漫射光由特定的光源产生,并在您的场景中的对象表面上产生反射。处于漫射光直接照射下的任何对象表面都变得很亮,而几乎未被照射到的区域就显得要暗一些。创建光源的过程和颜色的创建完全一致,先设置用来创建光源的数组。前三个参数分别是RGB三色分量,最后一个是alpha通道参数。
GLfloat LightAmbient[]= { 0.5f, 0.5f, 0.5f, 1.0f }; // 环境光参数
GLfloat LightDiffuse[]= { 1.0f, 1.0f, 1.0f, 1.0f }; // 漫射光参数
最后保存光源的位置。前三个参数和glTranslate中的一样。依次分别是XYZ轴上的位移。最后一个参数取为1.0f。这将告诉OpenGL这里指定的坐标就是光源的位置。
GLfloat LightPosition[]= { 0.0f, 0.0f, 2.0f, 1.0f }; // 光源位置
教程里使用三种纹理滤波方式,第一种纹理(texture 0)使用gl_nearest(不光滑)滤波方式构建。第二种纹理(texture 1)使用gl_linear(线性滤波)方式,离屏幕越近的图像看起来就越光滑。第三种纹理 (texture 2)使用mipmapped滤波方式,这将创建一个外观十分优秀的纹理。
下面是创建纹理的新方法:Mip-mapping(纹理细化)。您可能会注意到当图像在屏幕上变得很小的时候,很多细节将会丢失。刚才还很不错的图案变得很难看。当您告诉OpenGL创建一个mipmapped的纹理后,OpenGL将尝试创建不同尺寸的高质量纹理。当您向屏幕绘制一个mipmapped纹理的时候,OpenGL将选择它已经创建的外观最佳的纹理(带有更多细节)来绘制,而不仅仅是缩放原先的图像(这将导致细节丢失)。
要绕过OpenGL对纹理宽度和高度所加的限制 (64、128、256等等)。办法就是 gluBuild2DMipmaps,我们可以使用任意的位图来创建纹理。OpenGL将自动将它缩放到正常的大小。
// 创建 MipMapped 纹理
glBindTexture(GL_TEXTURE_2D, texture[2]);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
下面生成mipmapped纹理。我们使用三种颜色(红,绿,蓝)来生成一个2D纹理。TextureImage[0]->sizeX 是位图宽度,extureImage[0]->sizeY是位图高度,GL_RGB意味着我们依次使用RGB色彩。GL_UNSIGNED_BYTE意味着纹理数据的单位是字节。TextureImage[0]->data指向我们创建纹理所用的位图。
gluBuild2DMipmaps(GL_TEXTURE_2D, 3,
TextureImage[0]->sizeX, TextureImage[0]->sizeY,
GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
现在开始设置光源。下面一行设置环境光的发光量,光源light1开始发光:
glLightfv(GL_LIGHT1, GL_AMBIENT, LightAmbient); // 设置环境光
设置漫射光的发光量:
glLightfv(GL_LIGHT1, GL_DIFFUSE, LightDiffuse); // 设置漫射光
然后设置光源的位置:
glLightfv(GL_LIGHT1, GL_POSITION,LightPosition); // 光源位置
最后,我们启用一号光源,没有启用GL_LIGHTING,所以您看不见任何光线(只对光源进行设置、定位、甚至启用,光源都不会工作。除非我们启用GL_LIGHTING)。
glEnable(GL_LIGHT1); // 启用一号光源
课程中还学习了一个新的函数glNormal3f。Normal就是法线的意思,所谓法线是指经过面(多边形)上的一点且垂直于这个面(多边形)的直线。使用光源的时候必须指定一条法线。法线告诉OpenGL这个多边形的朝向,并指明多边形的正面和背面。如果没有指定法线,什么怪事情都可能发生。
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