1.基于openGL的3D教室场景.rar_3d场景漫游_OpenGL 3d_OpenGL的3D场景_opengl_场景 ope

#include<gl/glut.h> #include<windows.h> #include<math.h> #include <stdio.h> #include <stdlib.h> GLfloat light_position1[]={0,28,-20,1.0}; GLfloat model_ambient[]={0.05f,0.05f,0.05f,1.0f}; GLfloat mat_specular[]={0.8,1.0,1.0,1.0}; GLfloat mat_shininess[]={5.0}; GLfloat mat_ambient[]={0.1,0.1,0.1,1}; GLfloat white_light[]={1.0,1.0,1.0,1.0}; GLfloat light[]={1.0,1.0,1.0,1}; GLfloat light_position0[]={0,28,20,1.0}; GLint WinWidth; GLint WinHeight; //define the eyepoint typedef struct EyePoint { GLfloat x; GLfloat y; GLfloat z; }EyePoint; EyePoint myEye; EyePoint vPoint; GLfloat vAngle=0; //the function about the texture #define BMP_Header_Length 54 void grab(void) { FILE* pDummyFile; FILE* pWritingFile; GLubyte* pPixelData; GLubyte BMP_Header[BMP_Header_Length]; GLint i, j; GLint PixelDataLength; i = WinWidth * 3; while( i%4 != 0 ) ++i; PixelDataLength = i * WinHeight; pPixelData = (GLubyte*)malloc(PixelDataLength); if( pPixelData == 0 ) exit(0); pDummyFile = fopen("dummy.bmp", "rb"); if( pDummyFile == 0 ) exit(0); pWritingFile = fopen("grab.bmp", "wb"); if( pWritingFile == 0 ) exit(0); glPixelStorei(GL_UNPACK_ALIGNMENT, 4); glReadPixels(0, 0, WinWidth, WinHeight,GL_BGR_EXT, GL_UNSIGNED_BYTE, pPixelData); fread(BMP_Header, sizeof(BMP_Header), 1, pDummyFile); fwrite(BMP_Header, sizeof(BMP_Header), 1, pWritingFile); fseek(pWritingFile, 0x0012, SEEK_SET); i = WinWidth; j = WinHeight; fwrite(&i, sizeof(i), 1, pWritingFile); fwrite(&j, sizeof(j), 1, pWritingFile); fseek(pWritingFile, 0, SEEK_END); fwrite(pPixelData, PixelDataLength, 1, pWritingFile); fclose(pDummyFile); fclose(pWritingFile); free(pPixelData); } //power of two int power_of_two(int n) { if( n <= 0 ) return 0; return (n & (n-1)) == 0; } /* 函数load_texture * 读取一个BMP文件作为纹理 * 如果失败，返回0，如果成功，返回纹理编号 */ //load texture function GLuint load_texture(const char* file_name) { GLint width, height, total_bytes; GLubyte* pixels = 0; GLint last_texture_ID=0; GLuint texture_ID = 0; //打开文件，如果失败，返回 FILE* pFile = fopen(file_name, "rb"); if( pFile == 0 ) return 0; //读取文件中图像的宽度和高度 fseek(pFile, 0x0012, SEEK_SET); fread(&width, 4, 1, pFile); fread(&height, 4, 1, pFile); fseek(pFile, BMP_Header_Length, SEEK_SET); //计算每行像素所占字节数，并根据此数据计算总像素字节数 { GLint line_bytes = width * 3; while( line_bytes % 4 != 0 ) ++line_bytes; total_bytes = line_bytes * height; } //{ //根据总像素字节数分配内存 pixels = (GLubyte*)malloc(total_bytes); if( pixels == 0 ){ fclose(pFile); return 0; } //if //读取像素数据 if( fread(pixels, total_bytes, 1, pFile) <= 0 ){ free(pixels); fclose(pFile); return 0; } //if /* 在旧版本的OpenGL中 * 如果图像的宽度和高度不是整数次方，则需要进行缩放 * 这里并没有检查OpenGL版本，出于对版本兼容性的考虑，按旧版本处理 * 另外，无论旧版本还是新版本 * 当图像的宽度和高度超过当前OpenGL实现所支持的最大值时，也要进行缩放 */ { GLint max; glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max); if( !power_of_two(width)|| !power_of_two(height)|| width > max|| height > max ){ //规定缩放后新的大小为边长的正方形 const GLint new_width = 256; const GLint new_height = 256; GLint new_line_bytes, new_total_bytes; GLubyte* new_pixels = 0; //计算每行需要的字节数和总字节数 new_line_bytes = new_width * 3; while( new_line_bytes % 4 != 0 ) ++new_line_bytes; new_total_bytes = new_line_bytes * new_height; //分配内存 new_pixels = (GLubyte*)malloc(new_total_bytes); if( new_pixels == 0 ){ free(pixels); fclose(pFile); return 0; }//if //进行像素缩放 gluScaleImage(GL_RGB,width, height, GL_UNSIGNED_BYTE, pixels,new_width, new_height, GL_UNSIGNED_BYTE, new_pixels); //释放原来的像素数据，把pixels指向新的像素数据，并重新设置width和height free(pixels); pixels = new_pixels; width = new_width; height = new_height; }//if }//{ //分配一个新的纹理编号 glGenTextures(1, &texture_ID); if( texture_ID == 0 ) { free(pixels); fclose(pFile); return 0; } //if //绑定新的纹理，载入纹理并设置纹理参数 //在绑定前，先获得原来绑定的纹理编号，以便在最后进程恢复 glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture_ID); //在分配了纹理对象编号后，使用glBingTexture函数来指定“当前所使用的纹理对象” glBindTexture(GL_TEXTURE_2D, texture_ID); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_BGR_EXT, GL_UNSIGNED_BYTE, pixels); glBindTexture(GL_TEXTURE_2D, last_texture_ID); //之前为pixels分配的内存可在使用glTexImage2D以后释放 //因为此时像素数据已经被OpenGL另行保存了一份（可能被保存到专门的图形硬件中） free(pixels); return texture_ID; } //set the names of the texture objects 定义纹理对象的名称 GLuint texblackboard,texwindow,texwindow1,texceiling, texdoor,texbackwall,texgaodi,textdesk,textwall,textfloor,textdesk1; //draw the scene of the classroom void drawscence() { //draw the ceiling glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, texceiling); glColor3f(0.3,0.3,0.3); glBegin(GL_QUADS); glNormal3f(0.0f, -1.0f, 0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-40.0f,30.0f, 30.0f); glTexCoord2f(0.0f, 3.0f); glVertex3f(-40.0f, 30.0f, -30.0f); glTexCoord2f(6.0f, 3.0f); glVertex3f(40.0f, 30.0f, -30.0f); glTexCoord2f(6.0f, 0.0f); glVertex3f(40.0f, 30.0f, 30.0f); glEnd(); glDisable(GL_TEXTURE_2D); //draw the floor glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, textfloor); glColor3f(1.0f, 1.0f, 1.0f); glBegin(GL_QUADS); glNormal3f(0.0f, 1.0f, 0.0f); glVertex3f(-40.0f,0.0f, 30.0f); glVertex3f(-40.0f, 0.0f, -30.0f); glVertex3f(40.0f, 0.0f, -30.0f); glVertex3f(40.0f, 0.0f, 30.0f); glEnd(); glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, textwall); //the wall and the windows in left glColor3f(0.8f,0.8f, 0.8f); glBegin(GL_QUADS); glNormal3f(1.0f, 0.0f, 0.0f); glVertex3f(-40.0f,0.0f, 30.0f); glVertex3f(-40.0f, 30.0f, 30.0f); glVertex3f(-40.0f, 30.0f, -30.0f); glVertex3f(-40.0f, 0.0f, -30.0f); glEnd(); glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, texwindow); for(int n=0;n<=1;n++) { glBegin(GL_QUADS); glNormal3f(1.0, 0.0f, 0.0f); glTexCoord2f(1.0f, 0.0f);glVertex3f(-39.9, 10, -8+n*18); glTexCoord2f(1.0f, 1.0f);glVertex3f(-39.9, 20, -8+n*18); glTexCoord2f(0.0f, 1.0f);glVertex3f(-39.9, 20, -18+n*18); glTexCoord2f(0.0f, 0.0f);glVertex3f(-39.9, 10, -18+n*18); glEnd(); } glDisable(GL_TEXTURE_2D); glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, textwall); //the wall and the window in right glColor3f(0.8f,0.8f, 0.8f); glBegin(GL_QUADS); glNormal3f(-1.0f, 0.0f, 0.0f); glVertex3f(40.0f,0.0f, 30.0f); glVertex3f(40.0f, 30.0f, 30.0f); glVertex3f(40.0f, 30.0f, -30.0f); glVertex3f(40.0f, 0.0f, -30.0f); glEnd(); glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, texwindow1); glBegin(GL_QUADS); glNormal3f(-1.0, 0.0f, 0.0f); glTexCoord2f(1.0f, 0.0f);glVertex3f(39.5, 10, 10); glTexCoord2f(1.0f, 1.0f);glVertex3f(39.5, 20, 10); glTexCoord2f(0.0f, 1.0f);glVertex3f(39.5, 20, 0); glTexCoord2f(0.0f, 0.0f);glVertex3f(39.5, 10, 0); glEnd(); glDisable(GL_TEXTURE_2D); //backwall gl