OpenGL给立方体纹理贴图
下面是我的代码，实现的功能是绘制一个立方体，并给六个面贴上不同的纹理，（导入的六张bmp图片都是256*256大小的）。但是看到的效果是乱的，谁能帮我看看嘛？感激不尽~~
在这里我用到了SOIL（Simple OpenGL Image Library）库：http://nehe.gamedev.net/tutorial/lesson_06_texturing_update/47002/
我的代码：
#include <GL/glut.h>#include <stdio.h>#include <stdlib.h>#include "SOIL.h"GLuint texture[6];//6 textures for 6 faces of the cubeGLfloat xRot,yRot,zRot;//control cube's rotation//load the bitmap and convert it into a textureint LoadGLTextures(){ int Status = 0; char *bmpFile[6] = {"BmpFile/Ferrary.bmp","BmpFile/Honda.bmp","BmpFile/Hust.bmp", "BmpFile/Lamborghini.bmp","BmpFile/NeHe.bmp","BmpFile/Porsche.bmp"}; for (int i = 0;i < 6;++i) { texture[i] = SOIL_load_OGL_texture( bmpFile[i], SOIL_LOAD_AUTO, SOIL_CREATE_NEW_ID, SOIL_FLAG_INVERT_Y); printf("texture[%d]: %d\n",i,texture[i]); if(texture[i] == 0) Status = 0; glBindTexture(GL_TEXTURE_2D,texture[i]); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); } return Status;}int init(){ glEnable(GL_TEXTURE_2D); if(!LoadGLTextures()) return 0; glShadeModel(GL_SMOOTH); glClearColor(0.0f,0.0f,0.0f,0.5f); glClearDepth(1.0f); glEnable(GL_DEPTH_TEST); glDepthFunc(GL_LEQUAL); glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST); return 1;}void display(){ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); glTranslatef(0.0f,0.0f,-5.0f); glRotatef(xRot,1.0f,0.0f,0.0f); glRotatef(yRot,0.0f,1.0f,0.0f); glRotatef(zRot,0.0f,0.0f,1.0f); //glRotatef(45,1.0f,0.0f,0.0f); //glRotatef(45,0.0f,1.0f,0.0f); glBindTexture(GL_TEXTURE_2D,texture[0]); glBegin(GL_QUADS); // Front Face // Bottom Left Of The Texture and Quad glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // Bottom Right Of The Texture and Quad glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f); // Top Right Of The Texture and Quad glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f); // Top Left Of The Texture and Quad glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); glEnd(); glBindTexture(GL_TEXTURE_2D,texture[1]); glBegin(GL_QUADS); // Back Face // Bottom Right Of The Texture and Quad glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // Top Right Of The Texture and Quad glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // Top Left Of The Texture and Quad glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f); // Bottom Left Of The Texture and Quad glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f); glEnd(); glBindTexture(GL_TEXTURE_2D,texture[2]); glBegin(GL_QUADS); // Top Face // Top Left Of The Texture and Quad glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // Bottom Left Of The Texture and Quad glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // Bottom Right Of The Texture and Quad glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f); // Top Right Of The Texture and Quad glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f); glEnd(); glBindTexture(GL_TEXTURE_2D,texture[3]); glBegin(GL_QUADS); // Bottom Face // Top Right Of The Texture and Quad glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // Top Left Of The Texture and Quad glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, -1.0f); // Bottom Left Of The Texture and Quad glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f); // Bottom Right Of The Texture and Quad glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); glEnd(); glBindTexture(GL_TEXTURE_2D,texture[4]); glBegin(GL_QUADS); // Right face // Bottom Right Of The Texture and Quad glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f); // Top Right Of The Texture and Quad glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f); // Top Left Of The Texture and Quad glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f); // Bottom Left Of The Texture and Quad glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f); glEnd(); glBindTexture(GL_TEXTURE_2D,texture[5]); glBegin(GL_QUADS); // Left Face // Bottom Left Of The Texture and Quad glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // Bottom Right Of The Texture and Quad glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // Top Right Of The Texture and Quad glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // Top Left Of The Texture and Quad glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); glEnd(); /*xRot += 0.3f; yRot += 0.4f; zRot += 0.5f;*/ glutSwapBuffers();}void reshape(int w,int h){ if (0 == h) h = 1; glViewport(0,0,(GLsizei)w,(GLsizei)h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(60.0f,(GLfloat)w / (GLfloat)h,1,100); glMatrixMode(GL_MODELVIEW); glLoadIdentity();}void keyboard(unsigned char key,int x,int y){ switch(key){ case 'x': xRot += 1.0f; glutPostRedisplay(); break; case 'y': yRot += 1.0f; glutPostRedisplay(); break; case 'z': zRot += 1.0f; glutPostRedisplay(); break; default: break; }}int main(int argc,char** argv){ glutInit(&argc,argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB); glutInitWindowSize(400,400); glutInitWindowPosition(100,100); glutCreateWindow("Texture Map"); init(); glutDisplayFunc(display); glutReshapeFunc(reshape); glutKeyboardFunc(keyboard); glutMainLoop(); return 0;}