程序運行截圖如下：

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源碼如下：

myglwidget.h

#ifndef MYGLWIDGET_H #define MYGLWIDGET_H#include <QWidget> #include <QOpenGLWidget> class QTimer;class MyGLWidget : public QOpenGLWidget {Q_OBJECT public:explicit MyGLWidget(QWidget *parent=0);void setRelyX(const double x);void setRelyY(const double y);protected:void initializeGL();void resizeGL(int w, int h);void paintGL();protected slots:void beginRotate();private:int m_angle;double m_relyX;double m_relyY;QTimer *m_timer; };#endif // MYGLWIDGET_H

widget.h

#ifndef WIDGET_H #define WIDGET_H#include <QWidget>namespace Ui { class Widget; }class Widget : public QWidget {Q_OBJECTpublic:explicit Widget(QWidget *parent = 0);~Widget();public slots:void rotateXClicked();void rotateYClicked();void rotateXAndYClicked();void rotateAngleChanged();private:Ui::Widget *ui; };#endif // WIDGET_H

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main.cpp

#include "widget.h" #include <QApplication>int main(int argc, char *argv[]) {QApplication a(argc, argv);Widget w;w.show();return a.exec(); }

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myglwidget.cpp

#include "myglwidget.h" #include <GL/glu.h> #include <QTimer>MyGLWidget::MyGLWidget(QWidget *parent):QOpenGLWidget(parent) {m_angle=0;m_relyX=0.0;m_relyY=1.0; //默認向Y軸轉m_timer=new QTimer;connect(m_timer,SIGNAL(timeout()),this,SLOT(beginRotate()));m_timer->start(0); }void MyGLWidget::setRelyX(const double x) {m_relyX=x; }void MyGLWidget::setRelyY(const double y) {m_relyY=y; }void MyGLWidget::initializeGL() {glClearColor(0.0,0.0,0.0,0.0);glShadeModel(GL_SMOOTH);glClearDepth(1.0);glEnable(GL_DEPTH_TEST); }void MyGLWidget::resizeGL(int w, int h) {glViewport(0,0,(GLint)w,(GLint)h);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(45.0,(GLfloat)w/(GLfloat)h,0.1,100);glMatrixMode(GL_MODELVIEW);glLoadIdentity(); }void MyGLWidget::paintGL() {glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glLoadIdentity();glTranslatef(0.0,0.0,-6.0);glRotatef(m_angle,m_relyX,m_relyY,0.0);glBegin(GL_QUADS);// 上面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);//下面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);//前面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);//左面glColor3f(0.2,0.2,0.5);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);//右面glColor3f(0.5,0.4,0.5);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);//后面glColor3f(0.8,0.1,0.7);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(); }void MyGLWidget::beginRotate() {if(m_angle==360){m_angle=0;update();}m_angle++;update(); }

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widget.cpp

#include "widget.h" #include "ui_widget.h" #include <QDebug>Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget) {ui->setupUi(this);connect(ui->rotateXPushButton,SIGNAL(clicked(bool)),this,SLOT(rotateXClicked()));connect(ui->rotateYPushButton,SIGNAL(clicked(bool)),this,SLOT(rotateYClicked()));connect(ui->rotateXandYpushButton,SIGNAL(clicked(bool)),this,SLOT(rotateXAndYClicked())); }Widget::~Widget() {delete ui; }void Widget::rotateXClicked() {ui->openGLWidget->setRelyX(1);ui->openGLWidget->setRelyY(0); }void Widget::rotateYClicked() {ui->openGLWidget->setRelyX(0);ui->openGLWidget->setRelyY(1); }void Widget::rotateXAndYClicked() {ui->openGLWidget->setRelyX(1);ui->openGLWidget->setRelyY(1); }

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