opengl_texture.zip_OPENGL 纹理_纹理

// glutEx1.cpp : 定义控制台应用程序的入口点。 // #include <windows.h> #include <stdlib.h> #include <stdio.h> #include "glut.h" #include <gl/GLU.h> #include <gl/glaux.h> #include <gl/glext.h> #define BITMAP_ID 0x4D42 //验证是否为bitmap时使用 PFNGLMULTITEXCOORD2FARBPROC glMultiTexCoord2fARB = NULL; PFNGLACTIVETEXTUREARBPROC glActiveTextureARB = NULL; PFNGLCLIENTACTIVETEXTUREARBPROC glClientActiveTextureARB= NULL; #define ImageWidth 128 //纹理宽 #define ImageHeight 128 //纹理高 GLfloat planeCoefficients[4] = {1, 0, 0, 0}; float fTranslate; float fRotate; float fScale = 1.0f; // set inital scale value to 1.0f //static GLfloat xequalzero[] = {1.0, 0.0, 0.0, 0.0}; //static GLfloat *currentCoeff; static GLuint texName[3]; bool bPersp = false; bool bAnim = false; bool bWire = false; GLfloat lightDirection[]={0,1,1,1}; GLubyte tex[ImageWidth][ImageHeight][3]; int wHeight = 0; int wWidth = 0; AUX_RGBImageRec * LoadBMP(char *Filename) // 根据位图文件的名称进行加载 { FILE *File=NULL; // 文件指针 if (!Filename) // 如果没有指定位图文件名称就返回NULL { return NULL; } File=fopen(Filename,"r"); // 根据指定的位图文件名称，打开该位图文件 if (File) // 如果位图文件存在 { fclose(File); // 因为只是需要判断问题是否存在，而不需要对位图文件进行写操作，所以关闭位图文件 WCHAR wfilename[256]; memset(wfilename,0,sizeof(wfilename)); MultiByteToWideChar(CP_ACP,0,Filename,strlen(Filename)+1,wfilename,sizeof(wfilename)/sizeof(wfilename[0])); return auxDIBImageLoad(wfilename); // 其实，只需要一个真正存在的位图文件的名称，实现加载位图文件，并返回一个指针 } else return NULL; // 位图文件加载失败就返回NULL } //生成自定义纹理 void setUserdefinedTexture(int TEXW,int TEXH,GLubyte tex[ImageWidth][ImageHeight][3]){ glPixelStorei(GL_UNPACK_ALIGNMENT,1); //设置像素存储模式控制所读取的图像数据的行对齐方式. glTexImage2D(GL_TEXTURE_2D,0,3,TEXW,TEXW,0,GL_RGB,GL_UNSIGNED_BYTE,tex); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT); //自动生成纹理坐标 glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR) ; glTexGenfv(GL_S, GL_OBJECT_PLANE, planeCoefficients) ; glEnable(GL_TEXTURE_GEN_S) ; } void init(void) { glClearColor (0.0, 0.0, 0.0, 0.0); // 黑色背景 glShadeModel(GL_SMOOTH); // 启用阴影平滑 glEnable(GL_DEPTH_TEST); // 启用深度测试 glActiveTextureARB=(PFNGLCLIENTACTIVETEXTUREARBPROC)wglGetProcAddress("glActiveTextureARB"); glMultiTexCoord2fARB = (PFNGLMULTITEXCOORD2FARBPROC)wglGetProcAddress("glMultiTexCoord2fARB"); glClientActiveTextureARB=(PFNGLACTIVETEXTUREARBPROC)wglGetProcAddress("glClientActiveTextureARB"); AUX_RGBImageRec *TextureImage[3]; // 创建一个纹理图像数组，这里指定数组大小为6 char *pictures[] = {// 创建一个位图名称数组，对应6幅位图 "picture\\Monet.bmp", "picture\\Crack.bmp", "picture\\Spot.bmp" }; for(int i=0;i<3;i++) { TextureImage[i]=LoadBMP(pictures[i]); glGenTextures(4, &texName[i]); // 为第i个位图创建纹理 glBindTexture(GL_TEXTURE_2D, texName[i]);// 将生成的纹理的名称绑定到指定的纹理上 glPixelStorei(GL_UNPACK_ALIGNMENT, 1); //设置像素存储模式控制所读取的图像数据的行对齐方式 //制定当前纹理的过滤方式 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_RGB, TextureImage[i]->sizeX, TextureImage[i]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[i]->data); //在OpenGL中主要用来指定二维纹理和立方体纹理 //glEnable(GL_TEXTURE_GEN_S); glEnable(GL_TEXTURE_2D);// 启用纹理映射 glEnable(GL_CULL_FACE);//曲面在背面不显示 } glBindTexture(GL_TEXTURE_2D, texName[3]) ; //生成自定义纹理 int i, j; for (i = 0; i < ImageWidth; i++) { for (j = 0; j < ImageHeight; j++) { if ((i/8) % 2 == 0 && (j/8) % 2 == 0) tex[i][j][0] = (GLubyte)255; else if ((i/8) % 2 == 1 && (j/8) % 2 == 1) tex[i][j][0] = (GLubyte)255; else tex[i][j][0] = (GLubyte)0; tex[i][j][1] = (GLubyte)0; //g为0 tex[i][j][2] = (GLubyte)0; //b为0 } } setUserdefinedTexture(ImageWidth,ImageHeight,tex); glEnable(GL_LIGHTING); GLfloat ambient[] = { 1, 1, 1, 1.0 }; glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); GLfloat white[] = { 1.0, 1.0, 1.0, 1.0 }; GLfloat light_pos[] = {-2,2,2,1}; glLightfv(GL_LIGHT0, GL_POSITION, light_pos); glLightfv(GL_LIGHT0, GL_AMBIENT, white); glEnable(GL_LIGHT0); //glDisable(GL_LIGHT0); glEnable(GL_AUTO_NORMAL); glEnable(GL_NORMALIZE); glFrontFace(GL_CW); glCullFace(GL_BACK); glMaterialf (GL_FRONT, GL_SHININESS, 64.0); //材料属性 } void Draw_cuboid(GLfloat x1, GLfloat x2, GLfloat y1, GLfloat y2, GLfloat z1, GLfloat z2) // 绘制长方体 { glBegin(GL_QUADS); //// 前面 //glTexCoord2f(0.0f, 0.0f); glVertex3f(x1, y2, z1); // 纹理和四边形的左下 //glTexCoord2f(1.0f, 0.0f); glVertex3f(x2, y2, z1); // 纹理和四边形的右下 //glTexCoord2f(1.0f, 1.0f); glVertex3f(x2, y2, z2); // 纹理和四边形的右上 //glTexCoord2f(0.0f, 1.0f); glVertex3f(x1, y2, z2); // 纹理和四边形的左上 //// 后面 //glTexCoord2f(1.0f, 0.0f); glVertex3f(x1, y1, z1); // 纹理和四边形的右下 //glTexCoord2f(1.0f, 1.0f); glVertex3f(x1, y1, z2); // 纹理和四边形的右上 //glTexCoord2f(0.0f, 1.0f); glVertex3f(x2, y1, z2); // 纹理和四边形的左上 //glTexCoord2f(0.0f, 0.0f); glVertex3f(x2, y1, z1); // 纹理和四边形的左下 //// 顶面 //glTexCoord2f(0.0f, 1.0f); glVertex3f(x1, y1, z2); // 纹理和四边形的左上 //glTexCoord2f(0.0f, 0.0f); glVertex3f(x1, y2, z2); // 纹理和四边形的左下 //glTexCoord2f(1.0f, 0.0f); glVertex3f(x2, y2, z2); // 纹理和四边形的右下 //glTexCoord2f(1.0f, 1.0f); glVertex3f(x2, y1, z2); // 纹理和四边形的右上 //// 底面 //glTexCoord2f(1.0f, 1.0f); glVertex3f(x2, y2, z1); // 纹理和四边形的右上 //glTexCoord2f(0.0f, 1.0f); glVertex3f(x1, y2, z1); // 纹理和四边形的左上 //glTexCoord2f(0.0f, 0.0f); glVertex3f(x1, y1, z1); // 纹理和四边形的左下 //glTexCoord2f(1.0f, 0.0f); glVertex3f(x2, y1, z1); // 纹理和四边形的右下 //// 右面 //glTexCoord2f(1.0f, 0.0f); glVertex3f(x2, y1, z1); // 纹理和四边形的右下 //glTexCoord2f(1.0f, 1.0f); glVertex3f(x2, y1, z2); // 纹理和四边形的右上 //glTexCoord2f(0.0f, 1.0f); glVertex3f(x2, y2, z2); // 纹理和四边形的左上 //glTexCoord2f(0.0f, 0.0f); glVertex3f(x2, y2, z1); // 纹理和四边形的左下 //// 左面 //glTexCoord2f(0.0f, 0.0f); glVertex3f(x1, y1, z1); // 纹理和四边形的左下 //glTexCoord2f(1.0f, 0.0f); glVertex3f(x1, y2, z1); // 纹理和四边形的右下 //glTexCoord2f(1.0f, 1.0f); glVertex3f(x1, y2,z2); // 纹理和四边形的右上 //glTexCoord2f(0.0f, 1.0f); glVertex3f(x1, y1, z2); // 纹理和四边形的左上 //前面 glMultiTexCoord2fARB(GL_TEXTURE0_ARB,0.0f, 0.0f); glMultiTexCoord2fARB(GL_TEXTURE1_ARB,0.0f, 0.0f);glVertex3f(x1, y2, z1); // 纹理和四边形的左下 glMultiTexCoord2fARB(GL_TEXTURE0_ARB,1.0f, 0.0f);glMultiTexCoord2fARB(GL_TEXTURE1_ARB,1.0f, 0.0f); glVertex3f(x2, y2, z1); // 纹理和四边形的右下 glMultiTexCoord2fARB(GL_TEXTURE0_ARB,1.0f, 1.0f);glMultiTexCoord2fARB(GL_TEXTURE1_ARB,1.0f, 1.0f); glVertex3f(x2, y2, z2); // 纹理和四边形的右上 glMultiTexCoord2fARB(GL_TEXTURE0_ARB,0.0f, 1.0f); glMultiTexCoord2fARB(GL_TEXTURE1_ARB,0.0f, 1.0f); glV