C++ gui QT4 OPENGL 开发7--另一个逼真的opengl qt4茶壺代码

//main.cpp

#include <QApplication>
#include <iostream>

#include "teapots.h"

int main(int argc, char *argv[])
{
QApplication app(argc, argv);

if (!QGLFormat::hasOpenGL()) {
std::cerr << "This system has no OpenGL support" << std::endl;
return 1;
}

Teapots teapots;
teapots.setWindowTitle(QObject::tr("Teapots"));
teapots.resize(400, 400);
teapots.show();

return app.exec();
}

//teapots.h

#ifndef TEAPOTS_H
#define TEAPOTS_H

#include <QGLFramebufferObject>
#include <QGLWidget>

typedef GLfloat point[3];

class Teapots : public QGLWidget
{
Q_OBJECT

public:
Teapots(QWidget *parent = 0);
~Teapots();

protected:
void initializeGL();
void resizeGL(int width, int height);
void paintGL();
void mousePressEvent(QMouseEvent *event);
void mouseMoveEvent(QMouseEvent *event);
void mouseReleaseEvent(QMouseEvent *event);

private:
GLuint createGLTeapotObject();

GLuint glTeapotObject;

point data[32][4][4];

int level;

int xRot;
int yRot;
int zRot;
QPoint lastPos;
void setXRotation(int angle);
void normalizeAngle(int *angle);

void Teapot(long grid);
};

#endif

//teapots.cpp

#include <QtGui>
#include <QtOpenGL>

#include "teapots.h"
float rotX = 0.0, rotY = 0.0;
int teaList;

long patchData[][16] = {
{102,103,104,105,4,5,6,7,8,9,10,11,12,13,14,15},
{12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27},
{24,25,26,27,29,30,31,32,33,34,35,36,37,38,39,40},
{96,96,96,96,97,98,99,100,101,101,101,101,0,1,2,3,},
{0,1,2,3,106,107,108,109,110,111,112,113,114,115,116,117},
{118,118,118,118,124,122,119,121,123,126,125,120,40,39,38,37},
{41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56},
{53,54,55,56,57,58,59,60,61,62,63,64,28,65,66,67},
{68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83},
{80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95}
};

float cpData[][3] = {
{0.2,0,2.7},{0.2,-0.112,2.7},{0.112,-0.2,2.7},{0,-0.2,2.7},
{1.3375,0,2.53125},{1.3375,-0.749,2.53125},{0.749,-1.3375,2.53125},
{0,-1.3375,2.53125},{1.4375,0,2.53125},{1.4375,-0.805,2.53125},
{0.805,-1.4375,2.53125},{0,-1.4375,2.53125},{1.5,0,2.4},{1.5,-0.84,2.4},
{0.84,-1.5,2.4},{0,-1.5,2.4},{1.75,0,1.875},{1.75,-0.98,1.875},
{0.98,-1.75,1.875},{0,-1.75,1.875},{2,0,1.35},{2,-1.12,1.35},
{1.12,-2,1.35},{0,-2,1.35},{2,0,0.9},{2,-1.12,0.9},{1.12,-2,0.9},
{0,-2,0.9},{-2,0,0.9},{2,0,0.45},{2,-1.12,0.45},{1.12,-2,0.45},
{0,-2,0.45},{1.5,0,0.225},{1.5,-0.84,0.225},{0.84,-1.5,0.225},
{0,-1.5,0.225},{1.5,0,0.15},{1.5,-0.84,0.15},{0.84,-1.5,0.15},
{0,-1.5,0.15},{-1.6,0,2.025},{-1.6,-0.3,2.025},{-1.5,-0.3,2.25},
{-1.5,0,2.25},{-2.3,0,2.025},{-2.3,-0.3,2.025},{-2.5,-0.3,2.25},
{-2.5,0,2.25},{-2.7,0,2.025},{-2.7,-0.3,2.025},{-3,-0.3,2.25},
{-3,0,2.25},{-2.7,0,1.8},{-2.7,-0.3,1.8},{-3,-0.3,1.8},{-3,0,1.8},
{-2.7,0,1.575},{-2.7,-0.3,1.575},{-3,-0.3,1.35},{-3,0,1.35},
{-2.5,0,1.125},{-2.5,-0.3,1.125},{-2.65,-0.3,0.9375},{-2.65,0,0.9375},
{-2,-0.3,0.9},{-1.9,-0.3,0.6},{-1.9,0,0.6},{1.7,0,1.425},
{1.7,-0.66,1.425},{1.7,-0.66,0.6},{1.7,0,0.6},{2.6,0,1.425},
{2.6,-0.66,1.425},{3.1,-0.66,0.825},{3.1,0,0.825},{2.3,0,2.1},
{2.3,-0.25,2.1},{2.4,-0.25,2.025},{2.4,0,2.025},{2.7,0,2.4},
{2.7,-0.25,2.4},{3.3,-0.25,2.4},{3.3,0,2.4},{2.8,0,2.475},
{2.8,-0.25,2.475},{3.525,-0.25,2.49375},{3.525,0,2.49375},
{2.9,0,2.475},{2.9,-0.15,2.475},{3.45,-0.15,2.5125},{3.45,0,2.5125},
{2.8,0,2.4},{2.8,-0.15,2.4},{3.2,-0.15,2.4},{3.2,0,2.4},{0,0,3.15},
{0.8,0,3.15},{0.8,-0.45,3.15},{0.45,-0.8,3.15},{0,-0.8,3.15},
{0,0,2.85},{1.4,0,2.4},{1.4,-0.784,2.4},{0.784,-1.4,2.4},{0,-1.4,2.4},
{0.4,0,2.55},{0.4,-0.224,2.55},{0.224,-0.4,2.55},{0,-0.4,2.55},
{1.3,0,2.55},{1.3,-0.728,2.55},{0.728,-1.3,2.55},{0,-1.3,2.55},
{1.3,0,2.4},{1.3,-0.728,2.4},{0.728,-1.3,2.4},{0,-1.3,2.4},{0,0,0},
{1.425,-0.798,0},{1.5,0,0.075},{1.425,0,0},{0.798,-1.425,0},
{0,-1.5,0.075},{0,-1.425,0},{1.5,-0.84,0.075},{0.84,-1.5,0.075}
};

Teapots::Teapots(QWidget *parent)
: QGLWidget(parent)
{

xRot = 0;
yRot = 0;
zRot = 0;

int i,j, k, m, n;

level=1;

//glTeapotObject = createGLTeapotObject();

}

Teapots::~Teapots()
{
makeCurrent();
glDeleteLists(glTeapotObject, 1);
}

void Teapots::initializeGL()
{

float position[] = {0.0, 3.0, 3.0, 0.0};
float local_view[] = {0.0};
float ambient[] = {0.1745, 0.01175, 0.01175};
float diffuse[] = {0.61424, 0.04136, 0.04136};
float specular[] = {0.727811, 0.626959, 0.626959};

glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);

glLightfv(GL_LIGHT0, GL_POSITION, position);
glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, local_view);

glFrontFace(GL_CW);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_AUTO_NORMAL);
glEnable(GL_NORMALIZE);

glMaterialfv(GL_FRONT, GL_AMBIENT, ambient);
glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, specular);
glMaterialf(GL_FRONT, GL_SHININESS, 0.6*128.0);

glClearColor(0.5, 0.5, 0.5, 1.0);
glColor3f(1.0, 1.0, 1.0);

Teapot(14);

}

void Teapots::resizeGL(int width, int height)
{
int w,h;
w = width;
h = height;

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

glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-6.0, 6.0, -6.0, 6.0, -1.0, 10.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();

}

void Teapots::paintGL()
{

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glTranslatef(0.0, 0.0, -5.0);

glRotated(xRot / 16.0, 1.0, 0.0, 0.0);

glCallList(teaList);

glPopMatrix();

glFlush();//glutSwapBuffers ();

}

void Teapots::mousePressEvent(QMouseEvent *event)
{
lastPos = event->pos();
}

void Teapots::mouseMoveEvent(QMouseEvent *event)
{

int dx = event->x() - lastPos.x();
int dy = event->y() - lastPos.y();

if (event->buttons() & Qt::LeftButton) {
setXRotation(xRot + 8 * dy);
//setYRotation(yRot + 8 * dx);
} else if (event->buttons() & Qt::RightButton) {
setXRotation(xRot + 8 * dy);
// setZRotation(zRot + 8 * dx);
}
lastPos = event->pos();
}
void Teapots::setXRotation(int angle)
{
normalizeAngle(&angle);
if (angle != xRot) {
xRot = angle;
//emit xRotationChanged(angle);
updateGL();
}
}
void Teapots::normalizeAngle(int *angle)
{
while (*angle < 0)
*angle += 360 * 16;
while (*angle > 360 * 16)
*angle -= 360 * 16;
}
void Teapots::mouseReleaseEvent(QMouseEvent * /* event */)
{

}

GLuint Teapots::createGLTeapotObject()
{
int i;

GLuint list = glGenLists(1);
glNewList(list, GL_COMPILE);

// for(i=0;i<32;i++) divide_patch(data[i], level); /* divide all 32 patches */

//glFlush();

glBegin(GL_TRIANGLES);
glColor3f(255, 0, 0);
glVertex3f( 0.0, 0.1, 0.0 );
glVertex3f( -0.1, -0.1, 0.0 );
glVertex3f( 0.1, -0.1, 0.0 );

glVertex3f( 0.1, -0.1, 0.0 );
glVertex3f( -0.1, -0.1, 0.0 );
glVertex3f( 0.0, 0.1, 0.0 );

glEnd();

glEndList();
return list;
}

void Teapots::Teapot(long grid) {
float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
long i, j, k, l;

teaList = 1;
glNewList(teaList, GL_COMPILE);
glPushMatrix();
glRotatef(270.0, 1.0, 0.0, 0.0);
for (i = 0; i < 10; i++) {
for (j = 0; j < 4; j++) {
for (k = 0; k < 4; k++) {
for (l = 0; l < 3; l++) {
p[j][k][l] = cpData[patchData[i][j*4+k]][l];
q[j][k][l] = cpData[patchData[i][j*4+(3-k)]][l];
if (l == 1) {
q[j][k][l] *= -1.0;
}
if (i < 6) {
r[j][k][l] = cpData[patchData[i][j*4+(3-k)]][l];
if (l == 0) {
r[j][k][l] *= -1.0;
}
s[j][k][l] = cpData[patchData[i][j*4+k]][l];
if (l == 0) {
s[j][k][l] *= -1.0;
}
if (l == 1) {
s[j][k][l] *= -1.0;
}
}
}
}
}
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &p[0][0][0]);
glEnable(GL_MAP2_VERTEX_3);
glMapGrid2f(grid, 0.0, 1.0, grid, 0.0, 1.0);
glEvalMesh2(GL_FILL, 0, grid, 0, grid);
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &q[0][0][0]);
glEvalMesh2(GL_FILL, 0, grid, 0, grid);
if (i < 6) {
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &r[0][0][0]);
glEvalMesh2(GL_FILL, 0, grid, 0, grid);
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &s[0][0][0]);
glEvalMesh2(GL_FILL, 0, grid, 0, grid);
}
}
glDisable(GL_MAP2_VERTEX_3);
glPopMatrix();
glEndList();

}