Qt_OpenGL：3D空間中移動影象，供大家參考，具體內容如下

//.h

#ifndef GLWIDGET_H
#define GLWIDGET_H
 
#include <QGLWidget>
#include <QtOpenGL>
 
class QGLWidget;
class QTimer;
 
typedef struct Stars{
public:
 int r,g,b;
 GLfloat dist,angle;
}Stars;
 
class GLWidget : public QGLWidget
{
 Q_OBJECT
 
public:
 GLWidget(QWidget *parent = 0);
 ~GLWidget();
 
protected:
 void initializeGL();
 void paintGL();
 void resizeGL(int w,int h);
 void keyPressEvent(QKeyEvent*);
 void timerEvent(QTimerEvent*);
 
private:
 bool fullscreen;
 GLfloat rotate_angle;
 GLfloat zoom;
 GLfloat title;
 GLfloat spin;
 GLuint loop;
 bool twinkle;
 GLfloat blend;
 
private:
 void loadTextures();
 
 GLuint texture[1];
 
};
 
#endif // GLWIDGET_H

//.cpp

#include "glwidget.h"
#include <glut.h>
#include <QtGui>
#include <QtCore>
 
//好吧我承認全部變數不好
GLfloat light_ambient[4] = {0.5,0.5,1.0};
GLfloat light_diffiuse[4] = {1.0,1.0,1.0};
GLfloat light_position[4] = {0.0,0.0,2.0,0.0};
 
static const int num = 50;
static Stars stars[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);
}
 
void GLWidget::initializeGL(){
 
 setGeometry(300,150,500,500);
 loadTextures();
 glEnable(GL_TEXTURE_2D);
 glShadeModel(GL_SMOOTH);
 glClearColor(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);
 
 //為num個星星物件賦初值
 for(loop = 0; loop < num; ++loop){
  stars[loop].angle = 0.0;
  stars[loop].dist = (float(loop)/num) * 5.0;
  stars[loop].r = rand() % 256;
  stars[loop].g = rand() % 256;
  stars[loop].b = rand() % 256;
 }
}
 
void GLWidget::paintGL(){
 
 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 glBindTexture(GL_TEXTURE_2D,texture[0]);
 for(loop = 0; loop < num; ++loop){
  glLoadIdentity();
  glTranslatef(0.0,zoom); //移向螢幕裡面
  glRotatef(title,0.0); //沿x軸旋轉title
  glRotatef(stars[loop].angle,0.0); //每個星星沿y軸旋轉自己的角度
  glTranslatef(stars[loop].dist,0.0); //平移
  glRotatef(-stars[loop].angle,0.0); //沿y軸反轉
  glRotatef(-title,0.0); //沿x軸反轉
  if(twinkle){  //如果星星閃爍
   glColor4ub(stars[num-loop-1].r,stars[num-loop-1].g,stars[num-loop-1].b,255);
   glBegin(GL_QUADS);
    glTexCoord2f(0.0f,0.0f); glVertex3f(-1.0f,-1.0f,0.0f);
    glTexCoord2f(1.0f,0.0f); glVertex3f( 1.0f,1.0f); glVertex3f( 1.0f,1.0f,0.0f);
    glTexCoord2f(0.0f,1.0f); glVertex3f(-1.0f,0.0f);
   glEnd();
  }
  //如果星星不閃爍
  glRotatef(spin,0.0f,1.0f); //沿z軸自轉spin
  glColor4ub(stars[loop].r,stars[loop].g,stars[loop].b,255);
  glBegin(GL_QUADS);
   glTexCoord2f(0.0f,0.0f);
   glTexCoord2f(1.0f,0.0f);
   glTexCoord2f(0.0f,0.0f);
  glEnd();
 
  spin += 0.01f;
  stars[loop].angle += float(loop)/num;
  stars[loop].dist -= 0.01f; //距離逐漸減小，即越來越靠近螢幕
  if(stars[loop].dist < 0){
   stars[loop].dist += 5.0f;
   stars[loop].r = rand() % 256;
   stars[loop].g = rand() % 256;
   stars[loop].b = rand() % 256;
  }
 }
}
 
void GLWidget::resizeGL(int w,int h){
 
 if( 0 == h){
  h = 1;
 }
 glViewport(0,(GLsizei)w,(GLsizei)h);
 glMatrixMode(GL_PROJECTION);
 glLoadIdentity();
 gluPerspective(45.0,(GLdouble)w/(GLdouble)h,0.1,100.0);
 glColor4f(1.0f,0.5f);
 glBlendFunc(GL_SRC_ALPHA,GL_ONE);
 glMatrixMode(GL_MODELVIEW);
 glLoadIdentity();
}
 
void GLWidget::keyPressEvent(QKeyEvent *event){
 
 switch(event->key()){
 
  case Qt::Key_T:{
   twinkle = !twinkle;
   updateGL();
   break;
  }
  case Qt::Key_B:{
   blend = !blend;
   if(blend){
    glEnable(GL_BLEND);
    glDisable(GL_DEPTH_TEST);
   }else{
    glDisable(GL_BLEND);
    glEnable(GL_DEPTH_TEST); //色彩混合和深度快取不能同時開啟
   }
   updateGL();
   break;
  }
  case Qt::Key_PageUp:{  //移向螢幕
   zoom -= 0.2;
   updateGL();
   break;
  }
  case Qt::Key_PageDown:{ //移向螢幕外
   zoom += 0.2;
   updateGL();
   break;
  }
  case Qt::Key_Up:{   //加快旋轉速度
   title += 0.5;
   updateGL();
   break;
  }
  case Qt::Key_Down:{
   title -= 0.5;
   updateGL();
   break;
  }
  case Qt::Key_F1:{
   fullscreen = !fullscreen;
   if(fullscreen){
    showFullScreen();
   }else{
    setGeometry(300,500);
    showNormal();
   }
   updateGL();
   break;
  }
  case Qt::Key_Escape:{
   close();
  }
 }
}
 
void GLWidget::loadTextures(){
 
 QImage tex,buf;
 if(!buf.load(":Star.bmp")){
  qWarning("Cannot open the image...");
  QImage dummy(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,3,tex.width(),tex.height(),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);
}
 
void GLWidget::timerEvent(QTimerEvent *){
 updateGL();
}
 
GLWidget::~GLWidget()
{
}

//main.cpp

#include "glwidget.h"
#include <QApplication>
 
int main(int argc,char *argv[])
{
 QApplication a(argc,argv);
 GLWidget w;
 w.show();
 
 return a.exec();
}

//執行結果截圖：

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。