Ubuntu下安装OpenGL/Glut库

http://www.libaqiang.com/?p=78330

1.Ubuntu下安装OpenGL/Glut库

OpenGL（全写Open Graphics Library）是个定义了一个跨编程语言、跨平台的编程接口的规格，它用于三维图象（二维的亦可）。OpenGL是个专业的图形程序接口，是一个功能强大，调用方便的底层图形库。

ubuntu下安装OpenGL的方式如下：

sudo apt-get install freeglut3 freeglut3-dev #freeglut是一款开源的图形编程接口

sudo apt-get install binutils-gold #Ubuntu>=11.10的版本需要安装此包以解决连接问题

2. 通过链接OpenGL/Glut库来编译文件

g++ -lGL -lglut color_cube.cpp -o color_cube

3.解决编译时的链接错误问题

问题：

undefined reference to `gluPerspective’

collect2: ld returned 1 exit status

undefined reference to “gluLookAt”

解决办法：

g++ -lGL -lGLU -lglut color_cube.cpp -o color_cube

4.一段实例程序：

#include

#include

GLboolean polySmooth = GL_TRUE;

static void init(void){

glCullFace (GL_BACK);

glEnable (GL_CULL_FACE);

glBlendFunc (GL_SRC_ALPHA_SATURATE, GL_ONE);

glClearColor (0.0, 0.0, 0.0, 0.0);

}

#define NFACE 6

#define NVERT 8

void drawCube(GLdouble x0, GLdouble x1, GLdouble y0, GLdouble y1,GLdouble z0, GLdouble z1){

static GLfloat v[8][3];

static GLfloat c[8][4] = {

{0.0, 0.0, 0.0, 1.0}, {1.0, 0.0, 0.0, 1.0},

{0.0, 1.0, 0.0, 1.0}, {1.0, 1.0, 0.0, 1.0},

{0.0, 0.0, 1.0, 1.0}, {1.0, 0.0, 1.0, 1.0},

{0.0, 1.0, 1.0, 1.0}, {1.0, 1.0, 1.0, 1.0}

};

/* indices of front, top, left, bottom, right, back faces */

static GLubyte indices[NFACE][4] = {

{4, 5, 6, 7}, {2, 3, 7, 6}, {0, 4, 7, 3},

{0, 1, 5, 4}, {1, 5, 6, 2}, {0, 3, 2, 1}

};

v[0][0] = v[3][0] = v[4][0] = v[7][0] = x0;

v[1][0] = v[2][0] = v[5][0] = v[6][0] = x1;

v[0][1] = v[1][1] = v[4][1] = v[5][1] = y0;

v[2][1] = v[3][1] = v[6][1] = v[7][1] = y1;

v[0][2] = v[1][2] = v[2][2] = v[3][2] = z0;

v[4][2] = v[5][2] = v[6][2] = v[7][2] = z1;

#ifdef GL_VERSION_1_1

glEnableClientState (GL_VERTEX_ARRAY);

glEnableClientState (GL_COLOR_ARRAY);

glVertexPointer (3, GL_FLOAT, 0, v);

glColorPointer (4, GL_FLOAT, 0, c);

glDrawElements (GL_QUADS, NFACE*4, GL_UNSIGNED_BYTE, indices);

glDisableClientState (GL_VERTEX_ARRAY);

glDisableClientState (GL_COLOR_ARRAY);

#else

printf (“If this is GL Version 1.0, “);

printf (“vertex arrays are not supported.n”);

exit(1);

#endif

}

/* Note: polygons must be drawn from front to back

* for proper blending.

*/

void display(void) {

if (polySmooth) {

glClear (GL_COLOR_BUFFER_BIT);

glEnable (GL_BLEND);

glEnable (GL_POLYGON_SMOOTH);

glDisable (GL_DEPTH_TEST);

}else {

glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glDisable (GL_BLEND);

glDisable (GL_POLYGON_SMOOTH);

glEnable (GL_DEPTH_TEST);

}

glPushMatrix ();

glTranslatef (0.0, 0.0, -8.0);

glRotatef (30.0, 1.0, 0.0, 0.0);

glRotatef (60.0, 0.0, 1.0, 0.0);

drawCube(-0.8, 0.8, -0.8, 0.8, -0.8, 0.8);

glPopMatrix ();

glFlush ();

}

void reshape(int w, int h) {

glViewport(0, 0, (GLsizei) w, (GLsizei) h);

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

gluPerspective(30.0, (GLfloat) w/(GLfloat) h, 1.0, 20.0);

glMatrixMode(GL_MODELVIEW);

glLoadIdentity();

}

/* ARGSUSED1 */

void keyboard(unsigned char key, int x, int y) {

switch (key) {

case ‘t’:

case ‘T’:

polySmooth = !polySmooth;

glutPostRedisplay();

break;

case 27:

exit(0); /* Escape key */

break;

default:

break;

}

}

/* Main Loop

*/

int main(int argc, char** argv) {

glutInit(&argc, argv);

glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_ALPHA | GLUT_DEPTH);

glutInitWindowSize(400, 400);

glutCreateWindow(“OpenGL Color Cube”);

init ();

glutReshapeFunc (reshape);

glutKeyboardFunc (keyboard);

glutDisplayFunc (display);

glutMainLoop();

return 0;

}