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

用glut繪制一個茶壺

一句話，繼承QGLWidget，實現下面三個函數，用子類定義窗口就行了。

三個函數：

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

下面是我的QGLWidget的子類的源碼。

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){
    
}
 

QT筆記 -- (6) opengl