24,854
社区成员
发帖
与我相关
我的任务
分享
#include<gl\gl.h>
#include<gl\glu.h>
#include<gl\glut.h>
#include<iostream>
using namespace std;
#define checkImageWidth 64
#define checkImageHeight 64
GLubyte checkImage[checkImageHeight][checkImageWidth][4];
GLuint texName;
void makeCheckImage(){
int i, j, c;
for (i = 0; i < checkImageHeight; i++){
for (j = 0; j < checkImageWidth; j++){
c = (((i & 0x8) == 0) ^ ((j & 0x8) == 0)) * 255;
checkImage[i][j][0] = (GLubyte)c;
checkImage[i][j][1] = (GLubyte)c;
checkImage[i][j][2] = (GLubyte)c;
checkImage[i][j][3] = (GLubyte)255;
}
}
//for (i = 0; i < checkImageHeight; i++){
// for (j = 0; j < checkImageWidth; j++){
// checkImage[i][j][0] = 255;
// checkImage[i][j][1] = 1;
// checkImage[i][j][2] = 1;
// checkImage[i][j][3] = 255;
// }
//}
}
void init(){
glClearColor(0.0, 0.0, 0.0, 0.0);
glShadeModel(GL_FLAT);
glEnable(GL_DEPTH_TEST);
//glEnable(GL_TEXTURE_2D);
makeCheckImage();
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glGenTextures(1, &texName);
glBindTexture(GL_TEXTURE_2D, texName);
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, checkImageWidth, checkImageHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, checkImage);
//glDisable(GL_TEXTURE_2D);
}
void display(){
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_TEXTURE_2D);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glBindTexture(GL_TEXTURE_2D, texName);
glBegin(GL_QUADS);
glTexCoord2d(0.0, 0.0); glVertex3f(-2.0, -1.0, 0.0);
glTexCoord2d(1.0, 0.0); glVertex3f(0.0, -1.0, 0.0);
glTexCoord2d(1.0, 1.0); glVertex3f(0.0, 1.0, 0.0);
glTexCoord2d(0.0, 1.0); glVertex3f(-2.0, 1.0, 0.0);
glTexCoord2d(0.0, 0.0); glVertex3f(1.0, -1.0, 0.0);
glTexCoord2d(0.0, 1.0); glVertex3f(1.0, 1.0, 0.0);
glTexCoord2d(1.0, 1.0); glVertex3f(2.41421, 1.0, -1.41421);
glTexCoord2d(1.0, 0.0); glVertex3f(2.41421, -1.0, -1.41421);
glEnd();
glFlush();
glDisable(GL_TEXTURE_2D);
}
void reshape(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);
}
int main(){
init();
glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_SINGLE);
glutInitWindowSize(500, 500);
glutInitWindowPosition(500, 200);
glutCreateWindow("texture2d");
glutDisplayFunc(display);
glutReshapeFunc(reshape);
//glutKeyboardFunc(keyboard);
glutMainLoop();
}
再附上结果图: