Qt下的OpenGL例程

#include "glwidget.h" #include <QTimer> GLfloat lightAmbient[4] = {0.5,0.5,0.5,1.0}; GLfloat lightDiffuse[4] = {1.0,1.0,1.0,1.0}; GLfloat lightPosition[4] = {0.0,0.0,2.0,1.0}; GLWidget::GLWidget(QWidget *parent) : QGLWidget(parent) { ui.setupUi(this); //fullScreen = false; xRot = 0.0; yRot = 0.0; zRot = 0.0; QTimer *timer = new QTimer(this); connect(timer, SIGNAL(timeout()), this, SLOT(advanceGears())); timer->start(10); } void GLWidget::initializeGL() { setGeometry(300,150,640,480);//设置窗口初始化位置和大小 glShadeModel(GL_SMOOTH); //设置阴影平滑模式 glClearColor(0.0,0.0,0.0,0);//窗口背景色 glClearDepth(1.0); //设置深度缓存 glEnable(GL_DEPTH_TEST); //允许深度测试 glDepthFunc(GL_LEQUAL); //设置深度测试类型 glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST); //进行透视矫正 //光源 glLightfv(GL_LIGHT1,GL_AMBIENT,lightAmbient); glLightfv(GL_LIGHT1,GL_DIFFUSE,lightDiffuse); glLightfv(GL_LIGHT1,GL_POSITION,lightPosition); glEnable(GL_LIGHT1); } void GLWidget::paintGL() { glClear(GL_COLOR_BUFFER_BIT| GL_DEPTH_BUFFER_BIT); glLoadIdentity(); glTranslatef(-1.5, 0.0, -6.0); /*glRotatef(rTri,0.0,1.0,0.0);*/ glRotated(xRot / 16.0, 1.0, 0.0, 0.0); glRotated(yRot / 16.0, 0.0, 1.0, 0.0); glRotated(zRot / 16.0, 0.0, 0.0, 1.0); glBegin(GL_TRIANGLES); //前侧面 glColor3f(1.0,0.0,0.0); glVertex3f(0.0,1.0,0.0); glColor3f(0.0,1.0,0.0); glVertex3f(-1.0,-1.0,1.0); glColor3f(0.0,0.0,1.0); glVertex3f(1.0,-1.0,1.0); //右侧面 glColor3f(1.0,0.0,0.0); glVertex3f(0.0,1.0,0.0); glColor3f(0.0,0.0,1.0); glVertex3f(1.0,-1.0,1.0); glColor3f(0.0,1.0,0.0); glVertex3f(1.0,-1.0,-1.0); //后侧面 glColor3f(1.0,0.0,0.0); glVertex3f(0.0,1.0,0.0); glColor3f(0.0,1.0,0.0); glVertex3f(1.0,-1.0,-1.0); glColor3f(0.0,0.0,1.0); glVertex3f(-1.0,-1.0,-1.0); //左侧面 glColor3f(1.0,0.0,0.0); glVertex3f(0.0,1.0,0.0); glColor3f(0.0,0.0,1.0); glVertex3f(-1.0,-1.0,-1.0); glColor3f(0.0,1.0,0.0); glVertex3f(-1.0,-1.0,1.0); glEnd(); glBegin(GL_QUADS); //底面 glColor3f(0.0,0.0,1.0); glVertex3f(1.0,-1.0,1.0); glColor3f(0.0,1.0,0.0); glVertex3f(1.0,-1.0,-1.0); glColor3f(0.0,0.0,1.0); glVertex3f(-1.0,-1.0,-1.0); glColor3f(0.0,1.0,0.0); glVertex3f(-1.0,-1.0,1.0); glEnd(); glLoadIdentity(); glTranslatef(1.5, 0.0, -7.0); /*glRotatef(rQuad,1.0,1.0,1.0);*/ glRotated(xRot / 16.0, 1.0, 0.0, 0.0); glRotated(yRot / 16.0, 0.0, 1.0, 0.0); glRotated(zRot / 16.0, 0.0, 0.0, 1.0); glBegin(GL_QUADS); glColor3f(0.0,1.0,0.0); glVertex3f(1.0,1.0,-1.0); glVertex3f(-1.0,1.0,-1.0); glVertex3f(-1.0,1.0,1.0); glVertex3f(1.0,1.0,1.0); glColor3f(1.0,0.5,0.0); glVertex3f(1.0,-1.0,1.0); glVertex3f(-1.0,-1.0,1.0); glVertex3f(-1.0,-1.0,-1.0); glVertex3f(1.0,-1.0,-1.0); glColor3f(1.0,0.0,0.0); glVertex3f(1.0,1.0,1.0); glVertex3f(-1.0,1.0,1.0); glVertex3f(-1.0,-1.0,1.0); glVertex3f(1.0,-1.0,1.0); glColor3f(1.0,1.0,0.0); glVertex3f(1.0,-1.0,-1.0); glVertex3f(-1.0,-1.0,-1.0); glVertex3f(-1.0,1.0,-1.0); glVertex3f(1.0,1.0,-1.0); glColor3f(0.0,0.0,1.0); glVertex3f(-1.0,1.0,1.0); glVertex3f(-1.0,1.0,-1.0); glVertex3f(-1.0,-1.0,-1.0); glVertex3f(-1.0,-1.0,1.0); glColor3f(1.0,0.0,1.0); glVertex3f(1.0,1.0,-1.0); glVertex3f(1.0,1.0,1.0); glVertex3f(1.0,-1.0,1.0); glVertex3f(1.0,-1.0,-1.0); glEnd(); xRot += 10; yRot += 10; zRot += 10; } void GLWidget::resizeGL(int width, int height) { glViewport(0,0,(GLint)width,(GLint)height); //重置当前视口 glMatrixMode(GL_PROJECTION); //选择投影矩阵 glLoadIdentity(); //重置选择 好的投影矩阵 gluPerspective(45.0,(GLfloat)width/(GLfloat)height,0.1,100); //建立透视投影矩阵 glMatrixMode(GL_MODELVIEW); glLoadIdentity(); // glTranslated(0.0, 0.0, -40.0); } void GLWidget::setXRotation(int angle) { normalizeAngle(&angle); if (angle != xRot) { xRot = angle; emit xRotationChanged(angle); updateGL(); } } void GLWidget::setYRotation(int angle) { normalizeAngle(&angle); if (angle != yRot) { yRot = angle; emit yRotationChanged(angle); updateGL(); } } void GLWidget::setZRotation(int angle) { normalizeAngle(&angle); if (angle != zRot) { zRot = angle; emit zRotationChanged(angle); updateGL(); } } void GLWidget::advanceGears() { //glEnable(GL_LIGHTING); updateGL(); } void GLWidget::mousePressEvent(QMouseEvent *event) { lastPos = event->pos(); } void GLWidget::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(); } GLWidget::~GLWidget() { } void GLWidget::normalizeAngle(int *angle) { while (*angle < 0) *angle += 360 * 16; while (*angle > 360 * 16) *angle -= 360 * 16; }