环境
qt creator 5.6
代码
pro
#-------------------------------------------------
#
# Project created by QtCreator 2018-06-08T08:01:36
#
#-------------------------------------------------
QT += core gui opengl
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = myopengl
TEMPLATE = app
LIBS += -lopengl32 -lglu32
SOURCES += main.cpp\
widget.cpp
HEADERS += widget.h
FORMS += widget.ui
widget.h
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QtOpenGL/QtOpenGL>
namespace Ui {
class Widget;
}
class Widget : public QGLWidget
{
Q_OBJECT
public:
explicit Widget(QWidget *parent = 0);
~Widget();
protected:
void initializeGL();
void paintGL();
void resizeGL(int width, int height);
private:
void initWidget();
private:
Ui::Widget *ui;
};
#endif // WIDGET_H
widget.cpp
#include "widget.h"
#include "ui_widget.h"
#include <GL/glu.h>
Widget::Widget(QWidget *parent) :
QGLWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
initWidget();
}
Widget::~Widget()
{
delete ui;
}
void Widget::initializeGL()
{
glShadeModel( GL_SMOOTH );//启用阴影平滑
glClearColor(0.0,0.0,0.0,0.0);//设置清除屏幕时所用的颜色
glClearDepth(1.0);//设置深度缓存
glEnable(GL_DEPTH_TEST);//启用深度测试
glDepthFunc(GL_LEQUAL);//所作深度测试类型
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);//精细的透视修正
}
void Widget::paintGL()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);//清除屏幕和深度缓存
glLoadIdentity();//重置当前的模型观察矩阵
glTranslatef( -1.5, 0.0, -6.0 );//glTranslatef(x, y, z)沿着 X, Y 和 Z 轴移动
glBegin(GL_TRIANGLES);//开始绘制三角形
glColor3f(1.0,0.0,0.0);
glVertex3f(0.0,1.0,0.0);//上顶点
glColor3f(0.0,1.0,0.0);
glVertex3f(-1.0,-1.0,0.0);//左下顶点
glColor3f(0.0,0.0,1.0);
glVertex3f(1.0,-1.0,0.0);//右下顶点
glEnd();//三角形绘制结束
glTranslatef(3.0,0.0,0.0);//向右移动三个单位，在屏幕右边绘制正方形
glBegin(GL_QUADS);//开始绘制四边形
glColor3f(0.5,0.5,1.0);//设置成蓝色
glVertex3f(-1.0,1.0,0.0);//左上顶点
glVertex3f(1.0,1.0,0.0);//右上顶点
glVertex3f(1.0,-1.0,0.0);//右下顶点
glVertex3f(-1.0,-1.0,0.0);//左下顶点
glEnd();//四边形绘制结束
}
void Widget::resizeGL(int width, int height)
{
if(height == 0)
{
height = 1;
}
glViewport(0,0,(GLint)width,(GLint)height);//重置当前的视口
glMatrixMode(GL_PROJECTION);//选择投影矩阵
glLoadIdentity();//重置投影矩阵
gluPerspective(45.0,(GLfloat)width/(GLfloat)height,0.1,100.0);//建立透视投影矩阵
glMatrixMode(GL_MODELVIEW);//选择模型观察矩阵
glLoadIdentity();//充值模型观察矩阵
}
void Widget::initWidget()
{
setGeometry( 200, 200, 640, 480 );//初始化窗口位置和大小
}