前两天本人介绍了QT环境的搭建方法及简单程序的调试,可能讲得不太详细(没图,看文字不太直观,但是现在我还是没搞明白优快云怎么个发图法),几天我向大家介绍如何在qt中进行OpenGL编程,因为Qt里面已经集成了OpenGL所以直接使用就可以了。
下面是代码,不多说了,自己看吧(代码来自 NEHE的OpenGL教程,相信不少人应该都知道吧):
/*
Qt OpenGL Tutorial - Lesson 07
nehewidget.h
v 1.00
2002/12/19
Copyright (C) 2002 Cavendish
cavendish@qiliang.net
http://www.qiliang.net/nehe_qt
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
*/
#ifndef NEHEWIDGET_H
#define NEHEWIDGET_H
#include <Qt/qgl.h>
class NeHeWidget : public QGLWidget
{
Q_OBJECT
public:
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文件
/*
Qt OpenGL Tutorial - Lesson 07
nehewidget.cpp
v 1.00
2002/12/19
Copyright (C) 2002 Cavendish
cavendish@qiliang.net
http://www.qiliang.net/nehe_qt
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
*/
#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( ":/image/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文件
/*
Qt OpenGL Tutorial - Lesson 07
main.cpp
v 1.00
2002/12/19
Copyright (C) 2002 Cavendish
cavendish@qiliang.net
http://www.qiliang.net/nehe_qt
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
*/
#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();
}
下面是编译运行工程:
1.里面使用了Crate.bmp这个图片,别忘了在debug目录下新建image文件夹,并添加Crate.bmp木箱的图片;
2.然后进入cmd,进入到你的工程目录下,我的为MyOgl:
D:/MyOgl> qmake -project -t vcapp -o MyOgl.pro
D:/MyOgl> qmake
3.用你的VS道开生成.vcproj编译运行就能看到显示一个木箱子侧面的窗体了。^_^