程序運行截圖如下：

MyFristMSVCQt.h

#pragma once#include <QtWidgets/QWidget> #include "ui_MyFristMSVCQt.h"class MyFristMSVCQt : public QWidget {Q_OBJECTpublic:MyFristMSVCQt(QWidget *parent = Q_NULLPTR);void timerEvent(QTimerEvent *event);private:Ui::MyFristMSVCQtClass ui;int m_i; };

MYGLWidget.h

#pragma once#include <QOpenGLWidget> #include <QOpenGLFunctions>class MyGLWidget:public QOpenGLWidget,protected QOpenGLFunctions {Q_OBJECT public:MyGLWidget(QWidget *parent = 0);~MyGLWidget();void setNum(const int num);protected:void initializeGL();void paintGL();void resizeGL(int w, int h);protected:int m_num; };

main.cpp

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

MyFristMSVCQt.cpp

#include "MyFristMSVCQt.h" #include "ui_MyFristMSVCQt.h"MyFristMSVCQt::MyFristMSVCQt(QWidget *parent): QWidget(parent) {ui.setupUi(this);m_i = 0;this->setWindowTitle("MyFirstOPenGL");startTimer(200); }void MyFristMSVCQt::timerEvent(QTimerEvent *event) {Q_UNUSED(event)if (m_i == 4)m_i = 0;ui.openGLWidget->setNum(m_i++);ui.openGLWidget->update(); }

MyGLWidget.cpp

#include "MyGLWidget.h" #include <gl/GLU.h> #include <QDebug>MyGLWidget::MyGLWidget(QWidget *parent): QOpenGLWidget(parent) { }MyGLWidget::~MyGLWidget() { }void MyGLWidget::setNum(const int num) {m_num = num; }void MyGLWidget::initializeGL() {initializeOpenGLFunctions();glMatrixMode(GL_PROJECTION);gluPerspective(50.0f, 800.0f / 600.0f, 0.1f, 1000.0f);glMatrixMode(GL_MODELVIEW);glLoadIdentity(); }void MyGLWidget::paintGL() {glClearColor(0.0f, 0.0f, 0.0f, 1.0f);glClear(GL_COLOR_BUFFER_BIT);glBegin(GL_TRIANGLE_STRIP);switch (m_num){case 0:glColor4ub(255, 0, 0, 255); glVertex3f(-0.5f, -0.25f, -2.0f);glColor4ub(0, 0, 255, 255); glVertex3f(0.5f, -0.25f, -2.0f);glColor4ub(0, 255, 0, 255); glVertex3f(-0.5f, 0.25f, -2.0f);break;case 1:glColor4ub(255, 0, 0, 255); glVertex3f(-0.5f, -0.25f, -2.0f);glColor4ub(0, 0, 255, 255); glVertex3f(0.5f, -0.25f, -2.0f);glColor4ub(0, 255, 0, 255); glVertex3f(-0.5f, 0.25f, -2.0f);glColor4ub(0, 255, 0, 255); glVertex3f(0.5f, 0.25f, -2.0f);break;case 2:glColor4ub(255, 0, 0, 255); glVertex3f(-0.5f, -0.25f, -2.0f);glColor4ub(0, 0, 255, 255); glVertex3f(0.5f, -0.25f, -2.0f);glColor4ub(0, 255, 0, 255); glVertex3f(-0.5f, 0.25f, -2.0f);glColor4ub(0, 255, 0, 255); glVertex3f(0.5f, 0.25f, -2.0f);glColor4ub(255, 0, 0, 255); glVertex3f(-0.5f, 0.75f, -2.0f);break;case 3:glColor4ub(255, 0, 0, 255); glVertex3f(-0.5f, -0.25f, -2.0f);glColor4ub(0, 0, 255, 255); glVertex3f(0.5f, -0.25f, -2.0f);glColor4ub(0, 255, 0, 255); glVertex3f(-0.5f, 0.25f, -2.0f);glColor4ub(0, 255, 0, 255); glVertex3f(0.5f, 0.25f, -2.0f);glColor4ub(255, 0, 0, 255); glVertex3f(-0.5f, 0.75f, -2.0f);glColor4ub(0, 0, 255, 255); glVertex3f(0.5f, 0.75f, -2.0f);break;default:break;}glEnd(); }void MyGLWidget::resizeGL(int w, int h) {Q_UNUSED(w)Q_UNUSED(h) }

總結

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