QT笔记 -- (6) opengl

参考 http://blog.csdn.net/myths_0/article/details/24431597

用glut绘制一个茶壶

一句话，继承QGLWidget，实现下面三个函数，用子类定义窗口就行了。

三个函数：

    void initializeGL();
    void paintGL();
    void resizeGL(int width, int height);

下面是我的QGLWidget的子类的源码。

GLWidget.h

#pragma once#include "qgl.h"#include <gl/GLU.h>#include <OpenGL/GLUT.H>

class GLWidget : public QGLWidget{    Q_OBJECT

public:    GLWidget(QWidget *parent = nullptr) :QGLWidget(parent){};    ~GLWidget();

protected:    void initializeGL();    void paintGL();    void resizeGL(int width, int height);

    void keyPressEvent(QKeyEvent *e);};

GLWidget.cpp

#include "GLWidget.h"

GLWidget::~GLWidget(){}

void GLWidget::initializeGL(){    glShadeModel(GL_SMOOTH);    glClearColor(0.0, 0.0, 0.0, 0.0);    glClearDepth(1.0);    glEnable(GL_DEPTH_TEST);    glDepthFunc(GL_LEQUAL);    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);}

void GLWidget::paintGL(){    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);    glLoadIdentity();    glScalef(0.1,0.1,0.1);    gluLookAt(0, 0, 10, 0, 0, 0, 0, 1, 0);    glutWireTeapot(2);}

void GLWidget::resizeGL(int width, int height){    glViewport(0, 0, (GLint)width, (GLint)height);    glMatrixMode(GL_PROJECTION);    glLoadIdentity();    gluPerspective(45.0, (GLfloat)width / (GLfloat)height, 0.1, 100.0);    glMatrixMode(GL_MODELVIEW);    glLoadIdentity();}

void GLWidget::keyPressEvent(QKeyEvent *e){    }