OpenGL嵌入到Qt中

将OpenGL嵌入到Qt中的流程如下：

 

nehewidget.h

 

#ifndef NEHEWIDGET_H#define NEHEWIDGET_H#include <Qt/qgl.h>class NeHeWidget : public QGLWidget{ Q_OBJECTpublic: NeHeWidget( QWidget* parent = 0, const char* name = 0, bool fs = false ); ~NeHeWidget();protected: void initializeGL(); void paintGL(); void resizeGL( int width, int height ); void keyPressEvent( QKeyEvent *e ); void loadGLTextures();protected: bool fullscreen; GLfloat xRot, yRot, zRot; GLfloat zoom; GLfloat xSpeed, ySpeed; GLuint texture[3]; GLuint filter; bool light;};#endif // NEHEWIDGET_H

 

nehewidget.cpp

 

#include <QtGui/QApplication>#include <QtGui/QMainWindow>#include <QtGui/QWidget>#include <QtGui/QImage.h>#include <QtGui/qevent.h>#include "nehewidget.h"GLfloat lightAmbient[4] = { 0.5, 0.5, 0.5, 1.0 };GLfloat lightDiffuse[4] = { 1.0, 1.0, 1.0, 1.0 };GLfloat lightPosition[4] = { 0.0, 0.0, 2.0, 1.0 };NeHeWidget::NeHeWidget( QWidget* parent, const char* name, bool fs ) : QGLWidget( parent/*, name */){ xRot = yRot = zRot = 0.0; zoom = -5.0; xSpeed = ySpeed = 0.0; filter = 0; light = false; fullscreen = fs; setGeometry( 100, 100, 640, 480 ); //setCaption("NeHe's Texture, Lighting & Keyboard Tutorial"); if ( fullscreen ) showFullScreen();}NeHeWidget::~NeHeWidget(){}void NeHeWidget::paintGL(){ glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); glLoadIdentity(); glTranslatef( 0.0, 0.0, zoom ); glRotatef( xRot, 1.0, 0.0, 0.0 ); glRotatef( yRot, 0.0, 1.0, 0.0 ); glBindTexture( GL_TEXTURE_2D, texture[filter] ); glBegin( GL_QUADS ); glNormal3f( 0.0, 0.0, 1.0 ); glTexCoord2f( 0.0, 0.0 ); glVertex3f( -1.0, -1.0, 1.0 ); glTexCoord2f( 1.0, 0.0 ); glVertex3f( 1.0, -1.0, 1.0 ); glTexCoord2f( 1.0, 1.0 ); glVertex3f( 1.0, 1.0, 1.0 ); glTexCoord2f( 0.0, 1.0 ); glVertex3f( -1.0, 1.0, 1.0 ); glNormal3f( 0.0, 0.0, -1.0 ); glTexCoord2f( 1.0, 0.0 ); glVertex3f( -1.0, -1.0, -1.0 ); glTexCoord2f( 1.0, 1.0 ); glVertex3f( -1.0, 1.0, -1.0 ); glTexCoord2f( 0.0, 1.0 ); glVertex3f( 1.0, 1.0, -1.0 ); glTexCoord2f( 0.0, 0.0 ); glVertex3f( 1.0, -1.0, -1.0 ); glNormal3f( 0.0, 1.0, 0.0 ); glTexCoord2f( 0.0, 1.0 ); glVertex3f( -1.0, 1.0, -1.0 ); glTexCoord2f( 0.0, 0.0 ); glVertex3f( -1.0, 1.0, 1.0 ); glTexCoord2f( 1.0, 0.0 ); glVertex3f( 1.0, 1.0, 1.0 ); glTexCoord2f( 1.0, 1.0 ); glVertex3f( 1.0, 1.0, -1.0 ); glNormal3f( 0.0, -1.0, 0.0 ); glTexCoord2f( 1.0, 1.0 ); glVertex3f( -1.0, -1.0, -1.0 ); glTexCoord2f( 0.0, 1.0 ); glVertex3f( 1.0, -1.0, -1.0 ); glTexCoord2f( 0.0, 0.0 ); glVertex3f( 1.0, -1.0, 1.0 ); glTexCoord2f( 1.0, 0.0 ); glVertex3f( -1.0, -1.0, 1.0 ); glNormal3f( 1.0, 0.0, 0.0 ); glTexCoord2f( 1.0, 0.0 ); glVertex3f( 1.0, -1.0, -1.0 ); glTexCoord2f( 1.0, 1.0 ); glVertex3f( 1.0, 1.0, -1.0 ); glTexCoord2f( 0.0, 1.0 ); glVertex3f( 1.0, 1.0, 1.0 ); glTexCoord2f( 0.0, 0.0 ); glVertex3f( 1.0, -1.0, 1.0 ); glNormal3f( -1.0, 0.0, 0.0 ); glTexCoord2f( 0.0, 0.0 ); glVertex3f( -1.0, -1.0, -1.0 ); glTexCoord2f( 1.0, 0.0 ); glVertex3f( -1.0, -1.0, 1.0 ); glTexCoord2f( 1.0, 1.0 ); glVertex3f( -1.0, 1.0, 1.0 ); glTexCoord2f( 0.0, 1.0 ); glVertex3f( -1.0, 1.0, -1.0 ); glEnd(); xRot += xSpeed; yRot += ySpeed;}void NeHeWidget::initializeGL(){ loadGLTextures(); 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 ); glLightfv( GL_LIGHT1, GL_AMBIENT, lightAmbient ); glLightfv( GL_LIGHT1, GL_DIFFUSE, lightDiffuse ); glLightfv( GL_LIGHT1, GL_POSITION, lightPosition ); glEnable( GL_LIGHT1 );}void NeHeWidget::resizeGL( int width, int height ){ if ( height == 0 ) { height = 1; } 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 NeHeWidget::keyPressEvent( QKeyEvent *e ){ switch ( e->key() ) { case Qt::Key_L: light = !light; if ( !light ) { glDisable( GL_LIGHTING ); } else { glEnable( GL_LIGHTING ); } updateGL(); break; case Qt::Key_F: filter += 1;; if ( filter > 2 ) { filter = 0; } updateGL(); break; case Qt::Key_PageUp: zoom -= 0.2; updateGL(); break; case Qt::Key_PageDown: zoom += 0.2; updateGL(); break; case Qt::Key_Up: xSpeed -= 0.01; updateGL(); break; case Qt::Key_Down: xSpeed += 0.01; updateGL(); break; case Qt::Key_Right: ySpeed += 0.01; updateGL(); break; case Qt::Key_Left: ySpeed -= 0.01; updateGL(); break; case Qt::Key_F2: fullscreen = !fullscreen; if ( fullscreen ) { showFullScreen(); } else { showNormal(); setGeometry( 100, 100, 640, 480 ); } update(); break; case Qt::Key_Escape: close(); }}void NeHeWidget::loadGLTextures(){ QImage tex, buf; if ( !buf.load( ":/MyPicture/Crate.bmp" ) ) { qWarning( "Could not read image file, using single-color instead." ); QImage dummy( 128, 128, /*32*/QImage::Format_Indexed8); dummy.fill( Qt::green ); buf = dummy; } tex = QGLWidget::convertToGLFormat( buf ); glGenTextures( 3, &texture[0] ); glBindTexture( GL_TEXTURE_2D, texture[0] ); glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST ); glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST ); glTexImage2D( GL_TEXTURE_2D, 0, 3, tex.width(), tex.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, tex.bits() ); glBindTexture( GL_TEXTURE_2D, texture[1] ); glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ); glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR ); glTexImage2D( GL_TEXTURE_2D, 0, 3, tex.width(), tex.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, tex.bits() ); glBindTexture( GL_TEXTURE_2D, texture[2] ); glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ); glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST ); gluBuild2DMipmaps( GL_TEXTURE_2D, GL_RGB, tex.width(), tex.height(), GL_RGBA, GL_UNSIGNED_BYTE, tex.bits() );}

 

 

main.cpp

 

 #include <QtGui/QApplication>#include <QtGui/QMainWindow>#include <QtGui/QWidget>#include <QtGui/QMessageBox>#include <Qt/qgl.h>#include "nehewidget.h"int main( int argc, char **argv ){ bool fs = false; QApplication a(argc,argv); switch( QMessageBox::information( 0, "Start FullScreen?", "Would You Like To Run In Fullscreen Mode?", QMessageBox::Yes, QMessageBox::No | QMessageBox::Default ) ) { case QMessageBox::Yes: fs = true; break; case QMessageBox::No: fs = false; break; } NeHeWidget w( 0, 0, fs ); //a.setMainWidget( &w );//QT4.X以上版本不需要了 //a.setActiveWindow( &w ); w.show(); return a.exec();}

 

 Qt_2.pro  这是配置文件

 

 INCLUDEPLAT += E:/Qt/ogl/glLIBS += -L/E:/Qt/ogl / -lglu32LIBS += -L/E:/Qt/ogl / -lopengl32QT += openglHEADERS += nehewidget.hSOURCES += nehewidget.cpp / main.cppRESOURCES += nehe.qrc

 

 

nehe.qrc   这是资源文件

 

<RCC> <qresource prefix="MyPicture" > <file>Crate.bmp</file> </qresource></RCC>

Crate.bmp是个图片

 

在QtCreator中创建一个Qt空工程，

将以上几个文件加入到工程中。

就可以编译运行了。

 

环境框架：

 

 

 

 

 

我的实现结果：