OpenGL实现3D空间中移动图像

2023-07-18 14:20:04 90

Qt_OpenGL：3D空间中移动图像，供大家参考，具体内容如下

//.h

#ifndefGLWIDGET_H
#defineGLWIDGET_H

#include
#include

classQGLWidget;
classQTimer;

typedefstructStars{
public:
intr,g,b;
GLfloatdist,angle;
}Stars;

classGLWidget:publicQGLWidget
{
Q_OBJECT

public:
GLWidget(QWidget*parent=0);
~GLWidget();

protected:
voidinitializeGL();
voidpaintGL();
voidresizeGL(intw,inth);
voidkeyPressEvent(QKeyEvent*);
voidtimerEvent(QTimerEvent*);

private:
boolfullscreen;
GLfloatrotate_angle;
GLfloatzoom;
GLfloattitle;
GLfloatspin;
GLuintloop;
booltwinkle;
GLfloatblend;

private:
voidloadTextures();

GLuinttexture[1];

};

#endif//GLWIDGET_H

//.cpp

#include"glwidget.h"
#include
#include
#include

//好吧我承认全部变量不好
GLfloatlight_ambient[4]={0.5,0.5,0.5,1.0};
GLfloatlight_diffiuse[4]={1.0,1.0,1.0,1.0};
GLfloatlight_position[4]={0.0,0.0,2.0,0.0};

staticconstintnum=50;
staticStarsstars[num];

GLWidget::GLWidget(QWidget*parent)
:QGLWidget(parent)
{
fullscreen=false;
rotate_angle=0.0;
zoom=-15.0;
title=90.0;
spin=0.1;
loop=0;
twinkle=false;
blend=false;

startTimer(5);
}

voidGLWidget::initializeGL(){

setGeometry(300,150,500,500);
loadTextures();
glEnable(GL_TEXTURE_2D);
glShadeModel(GL_SMOOTH);
glClearColor(0.0,0.0,0.0,0.5);
glClearDepth(1.0);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST);

glBlendFunc(GL_SRC_ALPHA,GL_ONE);
glEnable(GL_BLEND);

//为num个星星对象赋初值
for(loop=0;loopkey()){

caseQt::Key_T:{
twinkle=!twinkle;
updateGL();
break;
}
caseQt::Key_B:{
blend=!blend;
if(blend){
glEnable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
}else{
glDisable(GL_BLEND);
glEnable(GL_DEPTH_TEST);//色彩混合和深度缓存不能同时开启
}
updateGL();
break;
}
caseQt::Key_PageUp:{//移向屏幕
zoom-=0.2;
updateGL();
break;
}
caseQt::Key_PageDown:{//移向屏幕外
zoom+=0.2;
updateGL();
break;
}
caseQt::Key_Up:{//加快旋转速度
title+=0.5;
updateGL();
break;
}
caseQt::Key_Down:{
title-=0.5;
updateGL();
break;
}
caseQt::Key_F1:{
fullscreen=!fullscreen;
if(fullscreen){
showFullScreen();
}else{
setGeometry(300,150,500,500);
showNormal();
}
updateGL();
break;
}
caseQt::Key_Escape:{
close();
}
}
}

voidGLWidget::loadTextures(){

QImagetex,buf;
if(!buf.load(":Star.bmp")){
qWarning("Cannotopentheimage...");
QImagedummy(128,128,QImage::Format_RGB32);
dummy.fill(Qt::green);
buf=dummy;
}
tex=convertToGLFormat(buf);
glGenTextures(1,&texture[0]);
glBindTexture(GL_TEXTURE_2D,texture[0]);
glTexImage2D(GL_TEXTURE_2D,0,3,tex.width(),tex.height(),0,GL_RGBA,
GL_UNSIGNED_BYTE,tex.bits());
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
}

voidGLWidget::timerEvent(QTimerEvent*){
updateGL();
}

GLWidget::~GLWidget()
{
}

//main.cpp

#include"glwidget.h"
#include

intmain(intargc,char*argv[])
{
QApplicationa(argc,argv);
GLWidgetw;
w.show();

returna.exec();
}

运行结果截图：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

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OpenGL实现3D空间中移动图像

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