【OpenGL】纹理贴图实例-棋盘

来源：互联网发布：银行数据标准定义规范编辑：程序博客网时间：2024/05/21 17:31

简单的纹理贴图实例,来学习OpenGL的功能

//main.h

#if !defined_MAIN_H_#define _MAIN_H_#include<gl\glut.h>#define WIDTH 64#define HEIGHT 64GLubyte Image[WIDTH][HEIGHT][4];static GLuint texName;GLint WinWidth;GLint WinHeight;void Initialization(void);void OnDisplay(void);void OnReshape(int,int);void keyboard (unsigned char key, int x, int y);void MakeImage(void);void Initialization(void);#endif

//main.cpp

// 纹理映射实例.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include "main.h"#include <stdlib.h>int main(int argc, char* argv[]){glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);glutInitWindowSize(480,480);glutInitWindowPosition(100, 100);glutCreateWindow("绘制sanwei");Initialization();glutReshapeFunc(OnReshape);glutDisplayFunc(OnDisplay);glutKeyboardFunc(keyboard);glutMainLoop();return 0; }//创建位图函数void MakeImage(void){int i,j,c;for(i=0;i< HEIGHT;i++){for(j=0;j<WIDTH;j++){c=(((i & 0x8) == 0) ^((j & 0x8) == 0)) *255;//计算纹理颜色Image[i][j][0] = GLubyte(c);Image[i][j][1] = GLubyte(c);Image[i][j][2] = GLubyte(c);Image[i][j][3] = GLubyte(255);}}}void Initialization(void){glClearColor (0.0, 0.0, 0.0, 0.0);glShadeModel(GL_FLAT);glEnable(GL_DEPTH_TEST);MakeImage();glPixelStorei(GL_UNPACK_ALIGNMENT, 1);glGenTextures(1, &texName);glBindTexture(GL_TEXTURE_2D, texName);//设置纹理参数glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);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, GL_RGBA, WIDTH, HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, Image);}//显示回调函数void OnDisplay(void){glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glEnable(GL_TEXTURE_2D);glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);glBindTexture(GL_TEXTURE_2D, texName);glBegin(GL_QUADS);//指定纹理坐标glTexCoord2f(0.0f,0.0f);glVertex3f(-2.0f,-2.0f,0.0f);glTexCoord2f(0.0f,1.0f);glVertex3f(-2.0f,2.0f,0.0f);glTexCoord2f(1.0f,1.0f);glVertex3f(2.0f,2.0f,0.0f);glTexCoord2f(1.0f,0.0f);glVertex3f(2.0f,-2.0f,0.0f);/*//其他效果glTexCoord2f(0.0, 0.0); glVertex3f(-2.0, -1.0, 0.0);glTexCoord2f(0.0, 1.0); glVertex3f(-2.0, 1.0, 0.0);glTexCoord2f(1.0, 1.0); glVertex3f(0.0, 1.0, 0.0);glTexCoord2f(1.0, 0.0); glVertex3f(0.0, -1.0, 0.0);glTexCoord2f(0.0, 0.0); glVertex3f(1.0, -1.0, 0.0);glTexCoord2f(0.0, 1.0); glVertex3f(1.0, 1.0, 0.0);glTexCoord2f(1.0, 1.0); glVertex3f(2.41421, 1.0, -1.41421);glTexCoord2f(1.0, 0.0); glVertex3f(2.41421, -1.0, -1.41421);*/glEnd();glFlush();glDisable(GL_TEXTURE_2D);}//重绘回调函数void OnReshape(int w,int h){glViewport(0, 0, (GLsizei) w, (GLsizei) h);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(60.0, (GLfloat) w/(GLfloat) h, 1.0, 30.0);glMatrixMode(GL_MODELVIEW);glLoadIdentity();glTranslatef(0.0, 0.0, -3.6);}  //按Esc退出程序void keyboard (unsigned char key, int x, int y){switch (key) {case 27:exit(0);break;default:break;}}

效果图:

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