QT-openGL学习-绘制平面图形 QT

**步骤一：**pro文件中添加 LIBS += -L -llibfreeglut -lopengl32

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步骤二：新建一个类并继承opengl

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三：代码
.h文件

#ifndef MYOPENGLWIDGET_H #define MYOPENGLWIDGET_H#include #include #include #include"QOpenGLFunctions" class MyOpenGLwidget:public QOpenGLWidget,protected QOpenGLFunctions { Q_OBJECT public: MyOpenGLwidget(QWidget *parent=nullptr); public: void initializeGL() Q_DECL_OVERRIDE; void paintGL() Q_DECL_OVERRIDE; void resizeGL(int width,int height) Q_DECL_OVERRIDE; }; #endif // MYOPENGLWIDGET_H

【QT-openGL学习-绘制平面图形】cpp文件

#include "myopenglwidget.h"MyOpenGLwidget::MyOpenGLwidget(QWidget *parent) : QOpenGLWidget(parent) {}void MyOpenGLwidget::initializeGL() { initializeOpenGLFunctions(); glClearColor(0,0,0,1); glEnable(GL_DEPTH_TEST); glEnable(GL_LIGHT0); glEnable(GL_LIGHTING); glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE); glEnable(GL_COLOR_MATERIAL); }void MyOpenGLwidget::paintGL() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glBegin(GL_QUADS); //四边形绘制glVertex3f(-50, -50, 0); glVertex3f( 50, -50, 0); glVertex3f( 50,50, 0); glVertex3f( -50,50, 0); glEnd(); }void MyOpenGLwidget::resizeGL(int width, int height) { glViewport(0,0,width,height); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(-width/2,width/2,-height/2,height/2,-1,1); glMatrixMode(GL_MODELVIEW); }