程序運行截圖如下：

代碼如下：
MyFrisstMSVCQt.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; };

MyGLWidget.h

#pragma once#include <QOpenGLWidget> #include <QOpenGLFunctions>class MyGLWidget:public QOpenGLWidget,protected QOpenGLFunctions {Q_OBJECT public:MyGLWidget(QWidget *parent = 0);~MyGLWidget();void setRGB_red(const int value);void setRGB_blue(const int value);void setRGB_green(const int value);protected:void initializeGL();void paintGL();void resizeGL(int w, int h);protected:int m_redValue;int m_blueValue;int m_greenValue; };

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"#include <QTimer> #include <QDebug> #include <QTime>MyFristMSVCQt::MyFristMSVCQt(QWidget *parent): QWidget(parent) {ui.setupUi(this);this->setWindowTitle("MyFirstOPenGL");qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));startTimer(200); }void MyFristMSVCQt::timerEvent(QTimerEvent *event) {Q_UNUSED(event)int numRed = qrand() % 256;int numGreen = qrand() % 256;int numBlue = qrand() % 256;ui.openGLWidget->setRGB_blue(numBlue);ui.openGLWidget->setRGB_green(numGreen);ui.openGLWidget->setRGB_red(numRed);ui.openGLWidget->update(); }

MyFLWidget.cpp

#include "MyGLWidget.h" #include <gl/GLU.h> #include <QDebug>MyGLWidget::MyGLWidget(QWidget *parent): QOpenGLWidget(parent) { }MyGLWidget::~MyGLWidget() { }void MyGLWidget::setRGB_blue(const int value) {m_blueValue = value; }void MyGLWidget::setRGB_green(const int value) {m_greenValue = value; }void MyGLWidget::setRGB_red(const int value) {m_redValue = value; }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_TRIANGLES);glColor4ub(m_blueValue, m_greenValue, m_redValue, 255);glVertex3f(-0.2f, -0.2f, -0.5f);glColor4ub(m_redValue, m_greenValue, m_blueValue, 255);glVertex3f(0.2f, -0.2f, -0.5f);glColor4ub(m_greenValue, m_redValue, m_blueValue, 255);glVertex3f(0.0f, 0.2f, -0.5f);glEnd(); }void MyGLWidget::resizeGL(int w, int h) {Q_UNUSED(w)Q_UNUSED(h) }

總結

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