Qt_OpenGL：3D贴不同纹理小测

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Qt_OpenGL：3D贴不同纹理小测

//.h

#ifndef TEXTURETEST_H
#define TEXTURETEST_H#include <QMainWindow>
#include <QtGui>
#include <QtOpenGL/QtOpenGL>class TextureTest : public QGLWidget
{Q_OBJECTpublic:TextureTest(QWidget *parent = 0);~TextureTest();void createMask();void loadTexture(GLuint *addrTextureID, QString picturePaths);protected:void synthesizeTexture();void initializeGL();void paintGL();void resizeGL(int width, int height);void wheelEvent(QWheelEvent *);void mousePressEvent(QMouseEvent*);void mouseMoveEvent(QMouseEvent*);private:GLfloat xRot, yRot, zRot;GLuint texture[10];QPoint lastPos;GLfloat zoomFactor;GLubyte image[128][128][3];
};#endif // TEXTURETEST_H

//.cpp

#include "texturetest.h"
#include <QString>
#include <QStringList>
#include <QTextStream>
#include <iostream>
#include <math.h>TextureTest::TextureTest(QWidget *parent): QGLWidget(parent)
{xRot = 0.0;yRot = 0.0;zRot = 0.0;zoomFactor = 1.0;setGeometry(100,100,600,600);setWindowTitle(" my Texture test");
}void TextureTest::createMask(){int i, j, c;for(i = 0; i< 128; ++i){for(j = 0; j<128; ++j){c = ((((i&0x08)==0)^((j&0x08))==0))*255;image[i][j][0]= (GLubyte) c;image[i][j][1]= (GLubyte) c;image[i][j][2]= (GLubyte) c;}}
}void TextureTest::initializeGL(){glShadeModel(GL_SMOOTH);glClearColor(1.0,0.5,0.8,1.0);glClearDepth(1.0);glEnable(GL_DEPTH_TEST);glDepthFunc(GL_LEQUAL);glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);loadTexture(&texture[0],":/b.jpg :/c.jpg :/d.jpg");
}void TextureTest::resizeGL(int width, int height){if(height == 0)height = 1;glMatrixMode(GL_PROJECTION);glLoadIdentity();if(width <= height){glOrtho(-10.0,10.0,-10.0*(GLfloat)(height)/(GLfloat)(width),10.0*(GLfloat)(height)/(GLfloat)(width),-100.0,100.0);}else{glOrtho(-10.0*(GLfloat)(width)/(GLfloat)(height),10.0*(GLfloat)(width)/(GLfloat)(height),-10.0,10.0,-100.0,100.0);}glViewport(0, 0, width, height);glMatrixMode(GL_MODELVIEW);glLoadIdentity();
}void TextureTest::paintGL(){glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glLoadIdentity();glRotatef(xRot, 1, 0, 0);glRotatef(yRot, 0, 1, 0);glRotatef(zRot, 0, 0, 1);glScalef(zoomFactor, zoomFactor, zoomFactor);synthesizeTexture();}void TextureTest::synthesizeTexture(){glEnable(GL_TEXTURE_2D);glBindTexture(GL_TEXTURE_2D, texture[0]);glBegin(GL_QUADS);  //底面glTexCoord2f(0.0,0.0); glVertex3f(-1,0,1);glTexCoord2f(1.0,0.0); glVertex3f(1,0,1);glTexCoord2f(1.0,1.0); glVertex3f(1,0,-1);glTexCoord2f(0.0,1.0); glVertex3f(-1,0,-1);glEnd();glBindTexture(GL_TEXTURE_2D, texture[1]);glBegin(GL_QUADS);      //前面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();glBindTexture(GL_TEXTURE_2D, texture[2]);glBegin(GL_QUADS);    //右面glTexCoord2f(0.0, 0.0); glVertex3f(1.0, -1.0, 1.0);glTexCoord2f(2.0, 0.0); glVertex3f(1.0, -1.0, -1.0);glTexCoord2f(2.0, 2.0); glVertex3f(1.0, 1.0, -1.0);glTexCoord2f(0.0, 2.0); glVertex3f(1.0, 1.0, 1.0);glEnd();}void TextureTest::wheelEvent(QWheelEvent *event){GLdouble numDegree = event->delta()/120.0;zoomFactor *= pow(1.25, numDegree);if(zoomFactor <= 0.1){zoomFactor = 0.1;}updateGL();
}void TextureTest::mousePressEvent(QMouseEvent *event){lastPos = event->pos();
}void TextureTest::mouseMoveEvent(QMouseEvent *event){GLfloat dx = GLfloat(event->x() - lastPos.x()) / width();GLfloat dy = GLfloat(event->y() - lastPos.y()) / width();if(event->buttons() & Qt::LeftButton){xRot += 180 * dy;zRot -= 180 * dx;updateGL();}else if( event->buttons() & Qt::RightButton){xRot += 180 * dy;yRot += 180 *dx;updateGL();}lastPos = event->pos();
}void TextureTest::loadTexture(GLuint *addrTextureID, QString picturePaths){picturePaths = picturePaths.simplified();QStringList strList = picturePaths.split(' ');int textureCounter = 0;int numTextures = strList.size();glGenTextures(numTextures, addrTextureID);QTextStream paths(&picturePaths);QString aPath;while(!paths.atEnd()){paths >> aPath;std::cout << aPath.toStdString() << std::endl;QImage tex, buf;if(!buf.load(aPath)){qWarning("Couldn't open image file...");QImage dummy(128, 128, QImage::Format_RGB32);dummy.fill(12);buf = dummy;}tex = QGLWidget::convertToGLFormat(buf);glBindTexture(GL_TEXTURE_2D, addrTextureID[textureCounter]);glTexImage2D(GL_TEXTURE_2D, 0, 3, tex.width(), tex.height(),0, GL_RGBA, GL_UNSIGNED_BYTE, tex.bits());glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);textureCounter += 1;}
}TextureTest::~TextureTest()
{}

//main.cpp

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

//运行结果截图：