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QT += widgets core opengl
SOURCES += \
main.cpp \
myglwidget.cpp
HEADERS += \
myglwidget.h
FORMS += \
form.ui
myglwidget.h
#ifndef MYGLWIDGET_H
#define MYGLWIDGET_H
#include <QGLWidget>
#include <QKeyEvent>
#include <QTimer>
class MyGLWidget : public QGLWidget
{
Q_OBJECT
public:
explicit MyGLWidget(QWidget *parent = 0);
protected:
void initializeGL();
void resizeGL(int w, int h);
void paintGL();
void keyPressEvent(QKeyEvent *event);
private:
bool fullScreen;
GLfloat m_rtri; //控制三角形的角度
GLfloat m_rquad; //控制四边形的角度
};
#endif // MYGLWIDGET_H
myglwidget.cpp
#include "myglwidget.h"
MyGLWidget::MyGLWidget(QWidget *parent) :
QGLWidget(parent)
{
fullScreen = false;
m_rtri = 0.0f;
m_rquad = 0.0f;
QTimer *timer = new QTimer;
connect(timer, SIGNAL(timeout()), this, SLOT(updateGL()));
timer->start(20);
}
void MyGLWidget::initializeGL()
{
glClearColor(0.0, 0.0, 0.0, 0.0); //黑色背景
glShadeModel(GL_SMOOTH); //启用阴影平滑
glClearDepth(1.0); //设置深度缓存
glEnable(GL_DEPTH_TEST); //启用深度测试
glDepthFunc(GL_LEQUAL); //所作深度测试的类型
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); //告诉系统对透视进行修正
}
void MyGLWidget::resizeGL(int w, int h)
{
glViewport(0, 0, (GLint)w, (GLint)h); //重置当前的视口
glMatrixMode(GL_PROJECTION); //选择投影矩阵
glLoadIdentity(); //重置投影矩阵
//设置视口的大小
gluPerspective(45.0, (GLfloat)w/(GLfloat)h, 0.1, 100.0);
glMatrixMode(GL_MODELVIEW); //选择模型观察矩阵
glLoadIdentity(); //重置模型观察矩阵
}
void MyGLWidget::paintGL()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //清除屏幕和深度缓存
glLoadIdentity(); //重置当前的模型观察矩阵
glTranslatef(-1.5f, 0.0f, -6.0f); //左移1.5单位，并移入屏幕6.0单位
glRotatef(m_rtri, 0.0f, 1.0f, 0.0f); //绕y轴旋转三角形
glBegin(GL_TRIANGLES); //开始绘制金字塔
glColor3f(1.0f, 0.0f, 0.0f); //红色
glVertex3f(0.0f, 1.0f, 0.0f); //上顶点(前侧面)
glColor3f(0.0f, 1.0f, 0.0f); //绿色
glVertex3f(-1.0f, -1.0f, 1.0f); //左下(前侧面)
glColor3f(0.0f, 0.0f, 1.0f); //蓝色
glVertex3f(1.0f, -1.0f, 1.0f); //右下(前侧面)
glColor3f(1.0f, 0.0f, 0.0f); //红色
glVertex3f(0.0f, 1.0f, 0.0f); //上顶点(右侧面)
glColor3f(0.0f, 0.0f, 1.0f); //蓝色
glVertex3f(1.0f, -1.0f, 1.0f); //左下(右侧面)
glColor3f(0.0f, 1.0f, 0.0f); //绿色
glVertex3f(1.0f, -1.0f, -1.0f); //右下(右侧面)
glColor3f(1.0f, 0.0f, 0.0f); //红色
glVertex3f(0.0f, 1.0f, 0.0f); //上顶点(后侧面)
glColor3f(0.0f, 1.0f, 0.0f); //绿色
glVertex3f(1.0f, -1.0f, -1.0f); //左下(后侧面)
glColor3f(0.0f, 0.0f, 1.0f); //蓝色
glVertex3f(-1.0f, -1.0f, -1.0f); //右下(后侧面)
glColor3f(1.0f, 0.0f, 0.0f); //红色
glVertex3f(0.0f, 1.0f, 0.0f); //上顶点(左侧面)
glColor3f(0.0f, 0.0f, 1.0f); //蓝色
glVertex3f(-1.0f, -1.0f, -1.0f); //左下(左侧面)
glColor3f(0.0f, 1.0f, 0.0f); //绿色
glVertex3f(-1.0f, -1.0f, 1.0f); //右下(左侧面)
glEnd(); //金字塔绘制结束
glLoadIdentity(); //重置模型观察矩阵
glTranslatef(1.5f, 0.0f, -6.0f); //右移1.5单位，并移入屏幕6.0单位
glRotatef(m_rquad, 1.0f, 0.0f, 0.0f); //绕x轴旋转四边形
glBegin(GL_QUADS); //开始绘制立方体
glColor3f(0.0f, 1.0f, 0.0f); //绿色
glVertex3f(1.0f, 1.0f, -1.0f); //右上(顶面)
glVertex3f(-1.0f, 1.0f, -1.0f); //左上(顶面)
glVertex3f(-1.0f, 1.0f, 1.0f); //左下(顶面)
glVertex3f(1.0f, 1.0f, 1.0f); //右下(顶面)
glColor3f(1.0f, 0.5f, 0.0f); //橙色
glVertex3f(1.0f, -1.0f, 1.0f); //右上(底面)
glVertex3f(-1.0f, -1.0f, 1.0f); //左上(底面)
glVertex3f(-1.0f, -1.0f, -1.0f); //左下(底面)
glVertex3f(1.0f, -1.0f, -1.0f); //右下(底面)
glColor3f(1.0f, 0.0f, 0.0f); //红色
glVertex3f(1.0f, 1.0f, 1.0f); //右上(前面)
glVertex3f(-1.0f, 1.0f, 1.0f); //左上(前面)
glVertex3f(-1.0f, -1.0f, 1.0f); //左下(前面)
glVertex3f(1.0f, -1.0f, 1.0f); //右下(前面)
glColor3f(1.0f, 1.0f, 0.0f); //黄色
glVertex3f(1.0f, -1.0f, -1.0f); //右上(后面)
glVertex3f(-1.0f, -1.0f, -1.0f); //左上(后面)
glVertex3f(-1.0f, 1.0f, -1.0f); //左下(后面)
glVertex3f(1.0f, 1.0f, -1.0f); //右下(后面)
glColor3f(0.0f, 0.0f, 1.0f); //蓝色
glVertex3f(-1.0f, 1.0f, 1.0f); //右上(左面)
glVertex3f(-1.0f, 1.0f, -1.0f); //左上(左面)
glVertex3f(-1.0f, -1.0f, -1.0f); //左下(左面)
glVertex3f(-1.0f, -1.0f, 1.0f); //右下(左面)
glColor3f(1.0f, 0.0f, 1.0f); //紫色
glVertex3f(1.0f, 1.0f, -1.0f); //右上(右面)
glVertex3f(1.0f, 1.0f, 1.0f); //左上(右面)
glVertex3f(1.0f, -1.0f, 1.0f); //左下(右面)
glVertex3f(1.0f, -1.0f, -1.0f); //右下(右面)
glEnd(); //立方体绘制结束
m_rtri += 0.5f; //增加金字体的旋转变量
m_rquad -= 0.5f; //减少立方体的旋转变量
}
void MyGLWidget::keyPressEvent(QKeyEvent *event)
{
switch(event->key())
{
case Qt::Key_F1: //F1为全屏和普通屏的切换键, Shitf+F1
fullScreen = !fullScreen;
if (fullScreen)
{
showFullScreen();
}
else
{
showNormal();
}
updateGL();
break;
case Qt::Key_Escape: //ESC为退出键
close();
break;
}
}
main.cpp
#include <QtGui/QApplication>
#include "myglwidget.h"
int main(int argc, char* argv[])
{
QApplication app(argc, argv);
MyGLWidget widget;
widget.resize(400, 300);
widget.show();
return app.exec();
}
结果截图
