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@Pigmon 2016-12-01T12:06:27.000000Z 字数 23307 阅读 1386

图形学参考大作业2

上课

如果不知道怎么整合到cgcourse-examples里

老师的Cgcourse-examples环境的配置方法 （pdf）
链接：http://pan.baidu.com/s/1jI2ToUE 密码：yxea

拼凑大作业指南+参考大作业1指南
https://www.zybuluo.com/Pigmon/note/582224

说明

参考大作业2，即整合Nehe Lesson10 场景漫游 + 环境贴图的那个。

修改建议：

  • 改场景贴图，地板，天花板分别是场景模型的前2个，和第3-4个三角形
  • 修改场景地形，在world.txt里面
  • 加几个光源
  • 加天空盒，或者背景贴图
  • 把手动移动环境球，变成自动按顺序走动

后面是程序和 world.txt。world.txt选好存放位置后，不要忘了修改程序里的路径。
如果程序执行闪退看看是不是贴图或world.txt的路径不对。

程序

仔细看中文注释
我也不会，所以很粗糙

  1. /*
  2. -----------------------------------------------------------------------
  3. This source file is part of "cgcourse-examples"
  4. (Examples for Computer Graphics Course of CCCE GUCAS.)
  5. Copyright (C) 2011 Xue Jian (jian.xue.cn@gmail.com)
  7. This program is free software: you can redistribute it and/or modify
  8. it under the terms of the GNU General Public License as published by
  9. the Free Software Foundation, either version 3 of the License, or
  10. (at your option) any later version.
  12. This program is distributed in the hope that it will be useful,
  13. but WITHOUT ANY WARRANTY; without even the implied warranty of
  14. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15. GNU General Public License for more details.
  17. You should have received a copy of the GNU General Public License
  18. along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19. -----------------------------------------------------------------------
  20. */
  21. /*
  22.  NeHe (nehe.gamedev.net) OpenGL tutorial series
  23.  GLUT port.in 2001 by milix (milix_gr@hotmail.com)
  24.  Most comments are from the original tutorials found in NeHe.
  25.  For VC++ users, create a Win32 Console project and link 
  26.  the program with glut32.lib, glu32.lib, opengl32.lib
  27. */
  29. #include <stdlib.h>
  30. #include <stdio.h>           // Standard C/C++ Input-Output
  31. #include <math.h>            // Math Functions (NEW)
  32. #include <windows.h>         // Standard Header For MSWindows Applications
  33. #include <gl/glut.h>         // The GL Utility Toolkit (GLUT) Header
  34. #include <GL/glext.h>
  35. #include <iostream>
  36. #include "glinc.h"
  37. #include "trackball.h"
  38. #include "quaternion.h"
  39. #include "camera.h"
  41. #include "FreeImage.h"
  43. #include "mitkBMPReader.h"
  44. #include "mitkVolume.h"
  45. #include "mitkPLYReader.h"
  46. #include "mitkTriangleMesh.h"
  48. void display();
  50. // -----------------------------------------------------------------------
  51. // Nehe
  52. // -----------------------------------------------------------------------
  53. #define TEXTURES_NUM 3       // We Have 3 Textures 
  54. #define PI_OVER_180  0.0174532925f
  56. typedef struct _VERTEX {
  57.     float x, y, z;
  58.     float u, v;
  59. } VERTEX;
  61. typedef struct _TRIANGLE {
  62.     VERTEX vertex[3];
  63. } TRIANGLE;
  65. typedef struct _SECTOR {
  66.     int numtriangles;
  67.     TRIANGLE* triangle;
  68. } SECTOR;
  70. // Global Variables
  71. bool    g_gamemode;             // GLUT GameMode ON/OFF
  72. bool    g_fullscreen;           // Fullscreen Mode ON/OFF (When g_gamemode Is OFF)
  73. bool    g_blend = false;        // Blending ON/OFF
  74. GLfloat g_xpos = 0.f;          // Position In X-Axis 
  75. GLfloat g_zpos = 0.f;          // Position In Z-Axis 
  76. GLfloat g_yrot = 0.0f;          // Y Rotation 
  77. GLfloat g_xspeed = 0.0f;        // X Rotation Speed
  78. GLfloat g_yspeed = 0.0f;        // Y Rotation Speed
  79. GLfloat g_z = 2.0f;             // Depth Into The Screen 
  80. GLfloat g_heading = 0.0f;
  81. GLfloat g_walkbias = 0.0f;      // Gives The Illusion That We Are Walking (NEW) 
  82. GLfloat g_walkbiasangle = 0.0f; // Gives The Illusion That We Are Walking (NEW) 
  83. GLfloat g_lookupdown = 5.0f;    // Look Position In The Z-Axis (NEW) 
  84. //GLuint    g_filter = 1;           // Which Filter To Use 
  85. GLuint  g_texid[TEXTURES_NUM];  // Our Textures' Id List 
  86. SECTOR  g_sector1;              // Our Model Goes Here:
  87. bool    g_key[255];             // Lookup Table For Key's State (NEW)
  89. float g_step_speed = 0.001f;
  90. float g_rot_speed = 0.05f;
  92. int g_window_size = 500;
  94. // -----------------------------------------------------------------------
  95. // cg course
  96. // -----------------------------------------------------------------------
  97. PFNGLGENFRAMEBUFFERSPROC glGenFramebuffers;
  98. PFNGLBINDFRAMEBUFFERPROC glBindFramebuffer;
  99. PFNGLDELETEFRAMEBUFFERSPROC glDeleteFramebuffers;
  100. PFNGLFRAMEBUFFERRENDERBUFFERPROC glFramebufferRenderbuffer;
  101. PFNGLFRAMEBUFFERTEXTURE2DPROC glFramebufferTexture2D;
  102. PFNGLCHECKFRAMEBUFFERSTATUSPROC glCheckFramebufferStatus;
  104. PFNGLGENRENDERBUFFERSPROC glGenRenderbuffers;
  105. PFNGLBINDRENDERBUFFERPROC glBindRenderbuffer;
  106. PFNGLDELETERENDERBUFFERSPROC glDeleteRenderbuffers;
  107. PFNGLRENDERBUFFERSTORAGEPROC glRenderbufferStorage;
  109. PFNGLGENERATEMIPMAPEXTPROC glGenerateMipmap;
  111. GLenum g_face_target[6] = {
  112.     GL_TEXTURE_CUBE_MAP_POSITIVE_X,
  113.     GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
  114.     GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
  115.     GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
  116.     GL_TEXTURE_CUBE_MAP_POSITIVE_Z,
  117.     GL_TEXTURE_CUBE_MAP_NEGATIVE_Z
  118. };
  120. GLuint g_fbo;                   // Our handle to the FBO
  121. GLuint g_depth_buffer;          // Our handle to the depth render buffer
  122. GLsizei g_cm_width;
  123. GLsizei g_cm_height;
  125. GLuint g_cm_texture_id[3];
  126. GLuint g_texture_id[6];
  128. float g_light_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f };
  129. float g_light_diffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f };
  130. float g_light_position[] = { 0.0f, 0.0f, 10.0f, 1.0f };
  131. float g_light_direction[] = { 0.0f, 0.0f, -1.0f, 0.0f };
  133. float g_light_rot = 0.0f;
  134. float g_light_rot_speed = 2.0f;
  136. float g_light_rot2 = 0.0f;
  137. float g_light_rot_speed2 = 6.0f;
  139. float g_material_ambient[] = { 1.0f, 0.57f, 0.04f, 1.0f };
  140. float g_material_diffuse[] = { 1.0f, 0.57f, 0.04f, 1.0f };
  141. float g_material_specular[] = { 0.33f, 0.33f, 0.52f, 1.0f };
  142. float g_material_emission[] = { 0.0f, 0.0f, 0.0f, 0.0f };
  143. float g_material_specular_power = 80.0f;
  145. int g_texgen_mode = GL_REFLECTION_MAP;
  146. int g_tex_wrap = GL_CLAMP_TO_EDGE;
  148. unsigned int g_filter = 2;              // Which Filter To Use
  150. Cameraf g_cam;
  152. Vectorf g_objpos(0.0f, 0.0f, 4.0f);
  153. Vectorf g_campos(0.0f, 0.0f, 5.0f);
  155. // -----------------------------------------------------------------------
  156. // Nehe
  157. // -----------------------------------------------------------------------
  158. FIBITMAP* load_image(char const *filename, int flag = 0)
  159. {
  160.     FREE_IMAGE_FORMAT fif = FreeImage_GetFileType(filename, 0);
  162.     if (fif == FIF_UNKNOWN) fif = FreeImage_GetFIFFromFilename(filename);
  163.     if (fif == FIF_UNKNOWN) return false;
  165.     return FreeImage_Load(fif, filename, flag);
  166. }
  168. void readstr(FILE* f, char* string)
  169. {
  170.     do {
  171.         fgets(string, 255, f);
  172.     } while ((string[0] == '/') || (string[0] == '\n'));
  173. }
  175. /// 通过world.txt的内容来构建场景
  176. void setupWorld()
  177. {
  178.     float x, y, z, u, v;
  179.     int numtriangles;
  180.     FILE *filein;
  181.     char oneline[255];
  182.     filein = fopen("data/test2/world.txt", "rt"); // File To Load World Data From
  184.     readstr(filein, oneline);
  185.     sscanf(oneline, "NUMPOLLIES %d\n", &numtriangles);
  186.     g_sector1.triangle = new TRIANGLE[numtriangles];
  187.     g_sector1.numtriangles = numtriangles;
  188.     for (int loop = 0; loop < numtriangles; loop++) {
  189.         for (int vert = 0; vert < 3; vert++) {
  190.             readstr(filein, oneline);
  191.             sscanf(oneline, "%f %f %f %f %f %f %f", &x, &y, &z, &u, &v);
  192.             g_sector1.triangle[loop].vertex[vert].x = x * 10.0f;
  193.             g_sector1.triangle[loop].vertex[vert].y = y * 10.0f;
  194.             g_sector1.triangle[loop].vertex[vert].z = z * 10.0f;
  195.             g_sector1.triangle[loop].vertex[vert].u = u;
  196.             g_sector1.triangle[loop].vertex[vert].v = v;
  197.         }
  198.     }
  199.     fclose(filein);
  200.     return;
  201. }
  203. bool load_nehe_textures()
  204. {
  205.     FIBITMAP *tdib = load_image("data/test2/rockwall.tga");
  206.     if (!tdib) return false;
  208.     bool status(false);
  209.     unsigned int bpp = FreeImage_GetBPP(tdib);
  211.     FIBITMAP *dib = tdib;
  212.     if (bpp != 24) dib = FreeImage_ConvertTo24Bits(tdib);
  214.     BYTE *bits = FreeImage_GetBits(dib);
  215.     unsigned int width = FreeImage_GetWidth(dib);
  216.     unsigned int height = FreeImage_GetHeight(dib);
  218.     GLenum format = FREEIMAGE_COLORORDER == FREEIMAGE_COLORORDER_BGR ? GL_BGR : GL_RGB;
  220.     RGBQUAD *pal = FreeImage_GetPalette(dib);
  222.     if (bits != 0 && width>0 && height>0) {
  223.         status = true;                                  // Set The Status To TRUE
  225.         glGenTextures(TEXTURES_NUM, g_texid);                   // Create Three Textures
  227.                                                                 // Create Nearest Filtered Texture
  228.         glBindTexture(GL_TEXTURE_2D, g_texid[0]);
  229.         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  230.         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  231.         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, format, GL_UNSIGNED_BYTE, bits);
  232.         // Create Linear Filtered Texture
  233.         glBindTexture(GL_TEXTURE_2D, g_texid[1]);
  234.         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  235.         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  236.         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, format, GL_UNSIGNED_BYTE, bits);
  237.         // Create MipMapped Texture
  238.         glBindTexture(GL_TEXTURE_2D, g_texid[2]);
  239.         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  240.         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
  241.         gluBuild2DMipmaps(GL_TEXTURE_2D, 3, width, height, GL_RGB, GL_UNSIGNED_BYTE, bits);
  242.     }
  244.     if (bpp != 24) FreeImage_Unload(dib);
  246.     FreeImage_Unload(tdib);
  248.     return status;                                      // Return The Status
  249. }
  251. // Our Keyboard Handler For Special Keys (Like Arrow Keys And Function Keys)
  252. void special_keys(int a_keys, int x, int y)
  253. {
  254.     switch (a_keys) {
  255.     case GLUT_KEY_F1:
  256.         // We Can Switch Between Windowed Mode And Fullscreen Mode Only
  257.         if (!g_gamemode) {
  258.             g_fullscreen = !g_fullscreen;       // Toggle g_fullscreen Flag
  259.             if (g_fullscreen) glutFullScreen(); // We Went In Fullscreen Mode
  260.             else glutReshapeWindow(500, 500);   // We Went In Windowed Mode
  261.         }
  262.         break;
  263.     default:
  264.         g_key[a_keys] = true;
  265.         break;
  266.     }
  267. }
  269. // Our Keyboard Handler For Special Key Releases.
  270. void special_keys_up(int key, int x, int y)
  271. {
  272.     g_key[key] = false;
  273. }
  275. // Our Game Function. Check The User Input And Performs The Rendering
  276. void game_function()
  277. {
  278.     // Process User Input
  279.     if (g_key[GLUT_KEY_PAGE_UP]) {
  280.         g_z -= 0.02f;
  281.         g_lookupdown -= g_rot_speed;
  282.     }
  283.     if (g_key[GLUT_KEY_PAGE_DOWN]) {
  284.         g_z += 0.02f;
  285.         g_lookupdown += g_rot_speed;
  286.     }
  287.     if (g_key[GLUT_KEY_UP]) {
  288.         g_xpos -= (float)sin(g_heading*PI_OVER_180) * g_step_speed;
  289.         g_zpos -= (float)cos(g_heading*PI_OVER_180) * g_step_speed;
  290.         //if (g_walkbiasangle >= 359.0f) g_walkbiasangle = 0.0f;
  291.         //else g_walkbiasangle += 10;
  292.         //g_walkbias = (float)sin(g_walkbiasangle*PI_OVER_180) / 20.0f;
  293.     }
  294.     if (g_key[GLUT_KEY_DOWN]) {
  295.         g_xpos += (float)sin(g_heading*PI_OVER_180) * g_step_speed;
  296.         g_zpos += (float)cos(g_heading*PI_OVER_180) * g_step_speed;
  297.         //if (g_walkbiasangle <= 1.0f) g_walkbiasangle = 359.0f;
  298.         //else g_walkbiasangle -= 10;
  299.         //g_walkbias = (float)sin(g_walkbiasangle*PI_OVER_180) / 20.0f;
  300.     }
  301.     if (g_key[GLUT_KEY_RIGHT]) {
  302.         g_heading -= g_rot_speed;
  303.         g_yrot = g_heading;
  304.     }
  305.     if (g_key[GLUT_KEY_LEFT]) {
  306.         g_heading += g_rot_speed;
  307.         g_yrot = g_heading;
  308.     }
  310.     // Do The Rendering
  311.     display();
  312. }
  314. // -----------------------------------------------------------------------
  315. // cg course
  316. // -----------------------------------------------------------------------
  317. void set_material()
  318. {
  319.     GLenum face = GL_FRONT_AND_BACK;
  320.     //glMaterialfv(face, GL_AMBIENT, g_material_ambient);
  321.     glMaterialfv(face, GL_AMBIENT, g_material_diffuse);
  322.     glMaterialfv(face, GL_DIFFUSE, g_material_diffuse);
  323.     glMaterialfv(face, GL_SPECULAR, g_material_specular);
  324.     glMaterialfv(face, GL_EMISSION, g_material_emission);
  325.     glMaterialf(face, GL_SHININESS, g_material_specular_power);
  326. }
  328. bool is_extension_supported(const char *extension)
  329. {
  330.     const GLubyte *extensions = NULL;
  331.     const GLubyte *start;
  332.     GLubyte *where, *terminator;
  334.     /* Extension names should not have spaces. */
  335.     where = (GLubyte *)strchr(extension, ' ');
  336.     if (where || *extension == '\0') return false;
  338.     extensions = glGetString(GL_EXTENSIONS);
  340.     /* It takes a bit of care to be fool-proof about parsing the
  341.     OpenGL extensions string.  Don't be fooled by sub-strings,
  342.     etc. */
  343.     start = extensions;
  344.     for (;;)
  345.     {
  346.         where = (GLubyte *)strstr((const char *)start, extension);
  347.         if (!where)
  348.             break;
  349.         terminator = where + strlen(extension);
  350.         if (where == start || *(where - 1) == ' ')
  351.             if (*terminator == ' ' || *terminator == '\0')
  352.                 return true;
  353.         start = terminator;
  354.     }
  355.     return false;
  356. }
  358. bool init_extfuncs()
  359. {
  360.     if (!is_extension_supported("GL_EXT_framebuffer_object")) return false;
  362.     glGenFramebuffers = (PFNGLGENFRAMEBUFFERSEXTPROC)wglGetProcAddress("glGenFramebuffersEXT");
  363.     glBindFramebuffer = (PFNGLBINDFRAMEBUFFEREXTPROC)wglGetProcAddress("glBindFramebufferEXT");
  364.     glDeleteFramebuffers = (PFNGLDELETEFRAMEBUFFERSPROC)wglGetProcAddress("glDeleteFramebuffersEXT");
  365.     glFramebufferRenderbuffer = (PFNGLFRAMEBUFFERRENDERBUFFERPROC)wglGetProcAddress("glFramebufferRenderbufferEXT");
  366.     glFramebufferTexture2D = (PFNGLFRAMEBUFFERTEXTURE2DPROC)wglGetProcAddress("glFramebufferTexture2DEXT");
  367.     glCheckFramebufferStatus = (PFNGLCHECKFRAMEBUFFERSTATUSPROC)wglGetProcAddress("glCheckFramebufferStatusEXT");
  369.     glGenRenderbuffers = (PFNGLGENRENDERBUFFERSPROC)wglGetProcAddress("glGenRenderbuffersEXT");
  370.     glBindRenderbuffer = (PFNGLBINDRENDERBUFFERPROC)wglGetProcAddress("glBindRenderbufferEXT");
  371.     glDeleteRenderbuffers = (PFNGLDELETERENDERBUFFERSPROC)wglGetProcAddress("glDeleteRenderbuffersEXT");
  372.     glRenderbufferStorage = (PFNGLRENDERBUFFERSTORAGEPROC)wglGetProcAddress("glRenderbufferStorageEXT");
  374.     glGenerateMipmap = (PFNGLGENERATEMIPMAPPROC)wglGetProcAddress("glGenerateMipmapEXT");
  377.     if (glGenFramebuffers == 0
  378.         || glBindFramebuffer == 0
  379.         || glDeleteFramebuffers == 0
  380.         || glFramebufferRenderbuffer == 0
  381.         || glFramebufferTexture2D == 0
  382.         || glCheckFramebufferStatus == 0
  383.         || glGenRenderbuffers == 0
  384.         || glBindRenderbuffer == 0
  385.         || glDeleteRenderbuffers == 0
  386.         || glRenderbufferStorage == 0
  387.         || glGenerateMipmap == 0)
  388.     {
  389.         std::cout << "glGenFramebuffers:        " << glGenFramebuffers << std::endl
  390.             << "glBindFramebuffer:        " << glBindFramebuffer << std::endl
  391.             << "glDeleteFramebuffers      " << glDeleteFramebuffers << std::endl
  392.             << "glFramebufferRenderbuffer " << glFramebufferRenderbuffer << std::endl
  393.             << "glFramebufferTexture2D:   " << glFramebufferTexture2D << std::endl
  394.             << "glCheckFramebufferStatus: " << glCheckFramebufferStatus << std::endl
  395.             << "glGenRenderbuffers:       " << glGenRenderbuffers << std::endl
  396.             << "glBindRenderbuffer:       " << glBindRenderbuffer << std::endl
  397.             << "glDeleteRenderbuffers:    " << glDeleteRenderbuffers << std::endl
  398.             << "glRenderbufferStorage:    " << glRenderbufferStorage << std::endl
  399.             << "glGenerateMipmap:         " << glGenerateMipmap << std::endl;
  400.         return false;
  401.     }
  403.     return true;
  404. }
  406. bool init_fbo()
  407. {
  408.     // Setup our FBO
  409.     glGenFramebuffers(1, &g_fbo);
  410.     glBindFramebuffer(GL_FRAMEBUFFER, g_fbo);
  412.     // Create the render buffer for depth   
  413.     glGenRenderbuffers(1, &g_depth_buffer);
  414.     glBindRenderbuffer(GL_RENDERBUFFER, g_depth_buffer);
  415.     glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, g_cm_height, g_cm_height);
  417.     // Attach the depth render buffer to the FBO as it's depth attachment
  418.     glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, g_depth_buffer);
  420.     glBindFramebuffer(GL_FRAMEBUFFER, 0);  // Unbind the FBO for now
  422.     return true;
  423. }
  425. void update_texgen()
  426. {
  427.     glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, g_texgen_mode);
  428.     glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, g_texgen_mode);
  429.     glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, g_texgen_mode);
  430. }
  432. void update_wrap()
  433. {
  434.     glBindTexture(GL_TEXTURE_CUBE_MAP, g_cm_texture_id[g_filter]);
  435.     glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, g_tex_wrap);
  436.     glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, g_tex_wrap);
  437.     glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, g_tex_wrap);
  438. }
  440. // ----------------------------------------------------------------------
  441. /// 袁胜：其实这个函数就是初始化cubemap的6个贴图，我也不知道怎么简化掉，
  442. ///     所以就只留了一个cm_top.bmp
  443. ///     你可以把这个路径改成你项目的路径，只拷贝这个cm_top
  444. ///     如果能把整个这个函数简化掉更好了
  445. bool load_cube_map_textures()
  446. {
  447.     mitkBMPReader *reader = new mitkBMPReader();
  448.     reader->AddFileName("data/dyncubemap/cm_top.bmp");
  449.     reader->AddFileName("data/dyncubemap/cm_top.bmp");
  450.     reader->AddFileName("data/dyncubemap/cm_top.bmp");
  451.     reader->AddFileName("data/dyncubemap/cm_top.bmp");
  452.     reader->AddFileName("data/dyncubemap/cm_top.bmp");
  453.     reader->AddFileName("data/dyncubemap/cm_top.bmp");
  455.     bool success = reader->Run();
  456.     if (success)
  457.     {
  458.         mitkVolume *teximgs = reader->GetOutput();
  460.         g_cm_width = teximgs->GetWidth();
  461.         g_cm_height = teximgs->GetHeight();
  463.         glGenTextures(3, g_cm_texture_id);
  465.         for (int loop = 0; loop<6; loop++)
  466.         {
  467.             // Create Nearest Filtered Texture
  468.             glBindTexture(GL_TEXTURE_CUBE_MAP, g_cm_texture_id[0]);
  469.             glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  470.             glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  471.             glTexImage2D(g_face_target[loop], 0, GL_RGB, g_cm_width, g_cm_height, 0, GL_RGB, GL_UNSIGNED_BYTE, teximgs->GetSliceData(loop));
  473.             // Create Linear Filtered Texture
  474.             glBindTexture(GL_TEXTURE_CUBE_MAP, g_cm_texture_id[1]);
  475.             glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  476.             glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  477.             glTexImage2D(g_face_target[loop], 0, GL_RGB, g_cm_width, g_cm_height, 0, GL_RGB, GL_UNSIGNED_BYTE, teximgs->GetSliceData(loop));
  479.             // Create MipMapped Texture
  480.             glBindTexture(GL_TEXTURE_CUBE_MAP, g_cm_texture_id[2]);
  481.             glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  482.             glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
  483.             gluBuild2DMipmaps(g_face_target[loop], GL_RGB, g_cm_width, g_cm_height, GL_RGB, GL_UNSIGNED_BYTE, teximgs->GetSliceData(loop));
  484.         }
  486.         teximgs->Delete();
  487.     }
  489.     reader->Delete();
  490.     return success;
  491. }
  493. bool init()
  494. {
  495.     if (!load_nehe_textures()) return false;
  497.     if (!load_cube_map_textures()) {
  498.         std::cout << "init: failed to load cube map textures!" << std::endl;
  499.         return false;
  500.     }
  502.     if (!init_extfuncs()) {
  503.         std::cout << "init: failed to initialize ext functions!" << std::endl;
  504.         return false;
  505.     }
  506.     if (!init_fbo()) {
  507.         std::cout << "init: failed to initialize frame buffer object!" << std::endl;
  508.         return false;
  509.     }
  511.     update_texgen();
  512.     update_wrap();
  514.     glEnable(GL_NORMALIZE);
  515.     glPixelStorei(GL_UNPACK_ALIGNMENT, 1);             // Pixel Storage Mode To Byte Alignment
  516.     glEnable(GL_TEXTURE_2D);                           // Enable Texture Mapping 
  517.     glBlendFunc(GL_SRC_ALPHA, GL_ONE);                 // Set The Blending Function (NEW)
  518.     glClearColor(0.0f, 0.0f, 0.0f, 0.0f);              // Black Background (CHANGED)
  519.     glClearDepth(1.0f);                                // Depth Buffer Setup
  520.     glDepthFunc(GL_LEQUAL);                            // The Type Of Depth Testing To Do
  521.     glEnable(GL_DEPTH_TEST);                           // Enables Depth Testing
  522.     glShadeModel(GL_SMOOTH);                           // Enable Smooth Shading
  523.     ShowCursor(FALSE);                                 // WiN API - Hides The Mouse Pointer (NEW)
  524.     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
  526.     glLightfv(GL_LIGHT0, GL_AMBIENT, g_light_ambient);      // Setup The Ambient Light
  527.     glLightfv(GL_LIGHT0, GL_DIFFUSE, g_light_diffuse);      // Setup The Diffuse Light
  528.     glLightf(GL_LIGHT1, GL_SPOT_EXPONENT, 1.0f);
  529.     glLightf(GL_LIGHT1, GL_SPOT_CUTOFF, 60.0f);
  530.     glEnable(GL_LIGHT0);                                // Enable Light One
  532.     setupWorld();
  533.     memset(g_key, 0, sizeof(g_key));
  535.     return true;
  536. }
  538. // -----------------------------------------------------------------------
  539. /// 绘制整个场景的地方。
  540. /// 整个大作业最核心的部分就是把dyncubemap例子中
  541. /// 动态创建cubemap的函数（create_dynamic_cube_map）
  542. /// 中绘制盒子的函数替换成这个
  543. void draw_scene()
  544. {
  545.     GLfloat x_m, y_m, z_m, u_m, v_m;
  546.     int numtriangles;
  548.     GLfloat xtrans = -g_xpos;
  549.     GLfloat ztrans = -g_zpos;
  550.     GLfloat ytrans = -g_walkbias - 0.25f;
  551.     GLfloat sceneroty = 360.0f - g_yrot;
  553.     glRotatef(g_lookupdown, 1.0f, 0, 0);
  554.     glRotatef(sceneroty, 0, 1.0f, 0);
  555.     glTranslatef(xtrans, ytrans, ztrans);
  557.     glBindTexture(GL_TEXTURE_2D, g_texid[g_filter]);
  558.     glEnable(GL_TEXTURE_2D);
  559.     numtriangles = g_sector1.numtriangles;
  561.     // Process Each Triangle
  562.     for (int loop_m = 0; loop_m < numtriangles; loop_m++)
  563.     {
  564.         glBegin(GL_TRIANGLES);
  565.         glNormal3f(0.0f, 0.0f, 1.0f);
  566.         x_m = g_sector1.triangle[loop_m].vertex[0].x;
  567.         y_m = g_sector1.triangle[loop_m].vertex[0].y;
  568.         z_m = g_sector1.triangle[loop_m].vertex[0].z;
  569.         u_m = g_sector1.triangle[loop_m].vertex[0].u;
  570.         v_m = g_sector1.triangle[loop_m].vertex[0].v;
  571.         glTexCoord2f(u_m, v_m); glVertex3f(x_m, y_m, z_m);
  573.         x_m = g_sector1.triangle[loop_m].vertex[1].x;
  574.         y_m = g_sector1.triangle[loop_m].vertex[1].y;
  575.         z_m = g_sector1.triangle[loop_m].vertex[1].z;
  576.         u_m = g_sector1.triangle[loop_m].vertex[1].u;
  577.         v_m = g_sector1.triangle[loop_m].vertex[1].v;
  578.         glTexCoord2f(u_m, v_m); glVertex3f(x_m, y_m, z_m);
  580.         x_m = g_sector1.triangle[loop_m].vertex[2].x;
  581.         y_m = g_sector1.triangle[loop_m].vertex[2].y;
  582.         z_m = g_sector1.triangle[loop_m].vertex[2].z;
  583.         u_m = g_sector1.triangle[loop_m].vertex[2].u;
  584.         v_m = g_sector1.triangle[loop_m].vertex[2].v;
  585.         glTexCoord2f(u_m, v_m); glVertex3f(x_m, y_m, z_m);
  586.         glEnd();
  587.     }
  588. }
  590. /// 动态创建cubemap
  591. void create_dynamic_cube_map()
  592. {
  593.     // First we bind the FBO so we can render to it
  594.     glBindFramebuffer(GL_FRAMEBUFFER, g_fbo);
  595.     glDrawBuffer(GL_COLOR_ATTACHMENT0);
  597.     // Save the view port and set it to the size of the texture
  598.     glPushAttrib(GL_VIEWPORT_BIT);
  599.     glViewport(0, 0, g_cm_width, g_cm_height);
  601.     glMatrixMode(GL_PROJECTION);
  602.     glPushMatrix();
  603.     glLoadIdentity();
  605.     //MUST USE 90 degree FOV!
  606.     g_cam.Perspective(90.0f, 1.0f, 0.1f, 5000.0f);
  608.     glMatrixMode(GL_MODELVIEW);
  610.     float facepos[6][6] = {
  611.         { 5.0f,  0.0f,  0.0f,  0.0f, -1.0f,  0.0f },
  612.         { -5.0f,  0.0f,  0.0f,  0.0f, -1.0f,  0.0f },
  613.         { 0.0f,  5.0f,  0.0f,  0.0f,  0.0f,  1.0f },
  614.         { 0.0f, -5.0f,  0.0f,  0.0f,  0.0f, -1.0f },
  615.         { 0.0f,  0.0f,  5.0f,  0.0f, -1.0f,  0.0f },
  616.         { 0.0f,  0.0f, -5.0f,  0.0f, -1.0f,  0.0f }
  617.     };
  619.     glBindTexture(GL_TEXTURE_CUBE_MAP, g_cm_texture_id[g_filter]);
  621.     for (int face = 0; face<6; ++face) {
  622.         glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, g_face_target[face], g_cm_texture_id[g_filter], 0);
  624.         Vectorf up(facepos[face][3], facepos[face][4], facepos[face][5]);
  626.         g_campos.ele[0] = facepos[face][0];
  627.         g_campos.ele[1] = facepos[face][1];
  628.         g_campos.ele[2] = facepos[face][2];
  629.         g_campos.ele[3] = 1.0f;
  631.         g_campos += g_objpos;
  632.         g_campos.ele[3] = 1.0f;
  634.         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  636.         glPushMatrix();
  638.         g_cam.LookAt(g_objpos.ele[0], g_objpos.ele[1], g_objpos.ele[2], g_campos.ele[0], g_campos.ele[1], g_campos.ele[2], up.ele[0], up.ele[1], up.ele[2]);
  639.         glLightfv(GL_LIGHT0, GL_POSITION, g_light_position);    // Position The Light
  640.         glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, g_light_direction);
  642.         glPushMatrix();
  643.         draw_scene();       /// 这里是关键
  644.         glPopMatrix();
  646.         glPopMatrix();
  648.         glFlush();
  649.     }
  651.     if (g_filter == 2) glGenerateMipmap(GL_TEXTURE_CUBE_MAP);
  653.     // Restore old view port and set rendering back to default frame buffer
  654.     glPopAttrib();
  655.     glBindFramebuffer(GL_FRAMEBUFFER, 0);
  657.     glMatrixMode(GL_PROJECTION);
  658.     glPopMatrix();
  660.     glMatrixMode(GL_MODELVIEW);
  661. }
  663. void display()
  664. {
  665.     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  667.     create_dynamic_cube_map();
  669.     g_campos.ele[0] = 0.0f;
  670.     g_campos.ele[1] = 0.0f;
  671.     g_campos.ele[2] = 5.0f;
  672.     g_campos.ele[3] = 1.0f;
  674.     Vectorf up(0.0f, 1.0f, 0.0f);
  676.     g_campos += g_objpos;
  677.     g_campos.ele[3] = 1.0f;
  678.     g_cam.LookAt(g_campos.ele[0], g_campos.ele[1], g_campos.ele[2], g_objpos.ele[0], g_objpos.ele[1], g_objpos.ele[2], up.ele[0], up.ele[1], up.ele[2]);
  679.     glLightfv(GL_LIGHT0, GL_POSITION, g_light_position);    // Position The Light
  680.     glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, g_light_direction);
  682.     glPushMatrix();
  684.     glDisable(GL_LIGHTING);
  686.     g_material_diffuse[0] = 0.9f;
  687.     g_material_diffuse[1] = 0.9f;
  688.     g_material_diffuse[2] = 0.9f;
  689.     set_material();
  690.     glEnable(GL_TEXTURE_GEN_S);                         // Enable Texture Coord Generation For S (NEW)
  691.     glEnable(GL_TEXTURE_GEN_T);                         // Enable Texture Coord Generation For T (NEW)
  692.     glEnable(GL_TEXTURE_GEN_R);
  693.     glEnable(GL_TEXTURE_CUBE_MAP);
  695.     glTranslatef(0.0f, 1.0f, 0.0f);
  696.     glutSolidSphere(1, 50, 50);
  698.     glPopMatrix();
  700.     glDisable(GL_TEXTURE_GEN_S);
  701.     glDisable(GL_TEXTURE_GEN_T);
  702.     glDisable(GL_TEXTURE_GEN_R);
  703.     glDisable(GL_TEXTURE_CUBE_MAP);
  705.     glEnable(GL_LIGHTING);
  706.     glPushMatrix();
  707.     draw_scene();
  708.     glPopMatrix();
  710.     glutSwapBuffers();
  712.     g_light_rot += g_light_rot_speed;
  713.     if (g_light_rot > 360.0f) g_light_rot = 0.0f;
  715.     g_light_rot2 += g_light_rot_speed2;
  716.     if (g_light_rot2 > 360.0f) g_light_rot2 = 0.0f;
  717. }
  719. void reshape(int w, int h)
  720. {
  721.     glViewport(0, 0, w, h);
  722.     glMatrixMode(GL_PROJECTION);     // Select The Projection Matrix
  723.     glLoadIdentity();                // Reset The Projection Matrix
  724.                                      // Calculate The Aspect Ratio And Set The Clipping Volume
  725.     if (h == 0) h = 1;
  726.     gluPerspective(45.0f, (float)w / (float)h, 0.1, 100.0);
  727.     glMatrixMode(GL_MODELVIEW);      // Select The Modelview Matrix
  728.     glLoadIdentity(); // Reset The Modelview Matrix
  729. }
  731. void keyboard(unsigned char key, int x, int y)
  732. {
  733.     switch (key)
  734.     {
  735.     case 27:
  736.         exit(0);
  737.         break;
  738.     }
  739. }
  741. int main(int argc, char *argv[])
  742. {
  743.     glutInit(&argc, argv);
  744.     glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
  745.     glutInitWindowSize(500, 500);
  746.     glutCreateWindow("参考大作业2");
  747.     if (!init()) return 1;
  749.     glutKeyboardFunc(keyboard);
  750.     glutSpecialFunc(special_keys);                   
  751.     glutSpecialUpFunc(special_keys_up);             
  752.     glutReshapeFunc(reshape);
  753.     glutDisplayFunc(display);
  754.     glutIdleFunc(game_function);
  755.     glutMainLoop();
  757.     return 0;
  758. }

wrold.txt

  2. NUMPOLLIES 36
  4. // Floor 1
  5. -3.0  0.0 -3.0 0.0 6.0
  6. -3.0  0.0  3.0 0.0 0.0
  7.  3.0  0.0  3.0 6.0 0.0
  9. -3.0  0.0 -3.0 0.0 6.0
  10.  3.0  0.0 -3.0 6.0 6.0
  11.  3.0  0.0  3.0 6.0 0.0
  13. // Ceiling 1
  14. -3.0  1.0 -3.0 0.0 6.0
  15. -3.0  1.0  3.0 0.0 0.0
  16.  3.0  1.0  3.0 6.0 0.0
  17. -3.0  1.0 -3.0 0.0 6.0
  18.  3.0  1.0 -3.0 6.0 6.0
  19.  3.0  1.0  3.0 6.0 0.0
  21. // A1
  23. -2.0  1.0  -2.0 0.0 1.0
  24. -2.0  0.0  -2.0 0.0 0.0
  25. -0.5  0.0  -2.0 1.5 0.0
  26. -2.0  1.0  -2.0 0.0 1.0
  27. -0.5  1.0  -2.0 1.5 1.0
  28. -0.5  0.0  -2.0 1.5 0.0
  30. // A2
  32.  2.0  1.0  -2.0 2.0 1.0
  33.  2.0  0.0  -2.0 2.0 0.0
  34.  0.5  0.0  -2.0 0.5 0.0
  35.  2.0  1.0  -2.0 2.0 1.0
  36.  0.5  1.0  -2.0 0.5 1.0
  37.  0.5  0.0  -2.0 0.5 0.0
  39. // B1
  41. -2.0  1.0  2.0 2.0  1.0
  42. -2.0  0.0   2.0 2.0 0.0
  43. -0.5  0.0   2.0 0.5 0.0
  44. -2.0  1.0  2.0 2.0  1.0
  45. -0.5  1.0  2.0 0.5  1.0
  46. -0.5  0.0   2.0 0.5 0.0
  48. // B2
  50.  2.0  1.0  2.0 2.0  1.0
  51.  2.0  0.0   2.0 2.0 0.0
  52.  0.5  0.0   2.0 0.5 0.0
  53.  2.0  1.0  2.0 2.0  1.0
  54.  0.5  1.0  2.0 0.5  1.0
  55.  0.5  0.0   2.0 0.5 0.0
  57. // C1
  59. -2.0  1.0  -2.0 0.0  1.0
  60. -2.0  0.0   -2.0 0.0 0.0
  61. -2.0  0.0   -0.5 1.5 0.0
  62. -2.0  1.0  -2.0 0.0  1.0
  63. -2.0  1.0  -0.5 1.5  1.0
  64. -2.0  0.0   -0.5 1.5 0.0
  66. // C2
  68. -2.0  1.0   2.0 2.0 1.0
  69. -2.0  0.0   2.0 2.0 0.0
  70. -2.0  0.0   0.5 0.5 0.0
  71. -2.0  1.0  2.0 2.0 1.0
  72. -2.0  1.0  0.5 0.5 1.0
  73. -2.0  0.0   0.5 0.5 0.0
  75. // D1
  77. 2.0  1.0  -2.0 0.0 1.0
  78. 2.0  0.0   -2.0 0.0 0.0
  79. 2.0  0.0   -0.5 1.5 0.0
  80. 2.0  1.0  -2.0 0.0 1.0
  81. 2.0  1.0  -0.5 1.5 1.0
  82. 2.0  0.0   -0.5 1.5 0.0
  84. // D2
  86. 2.0  1.0  2.0 2.0 1.0
  87. 2.0  0.0   2.0 2.0 0.0
  88. 2.0  0.0   0.5 0.5 0.0
  89. 2.0  1.0  2.0 2.0 1.0
  90. 2.0  1.0  0.5 0.5 1.0
  91. 2.0  0.0   0.5 0.5 0.0
  93. // Upper hallway - L
  94. -0.5  1.0  -3.0 0.0 1.0
  95. -0.5  0.0   -3.0 0.0 0.0
  96. -0.5  0.0   -2.0 1.0 0.0
  97. -0.5  1.0  -3.0 0.0 1.0
  98. -0.5  1.0  -2.0 1.0 1.0
  99. -0.5  0.0   -2.0 1.0 0.0
  101. // Upper hallway - R
  102. 0.5  1.0  -3.0 0.0 1.0
  103. 0.5  0.0   -3.0 0.0 0.0
  104. 0.5  0.0   -2.0 1.0 0.0
  105. 0.5  1.0  -3.0 0.0 1.0
  106. 0.5  1.0  -2.0 1.0 1.0
  107. 0.5  0.0   -2.0 1.0 0.0
  109. // Lower hallway - L
  110. -0.5  1.0  3.0 0.0 1.0
  111. -0.5  0.0   3.0 0.0 0.0
  112. -0.5  0.0   2.0 1.0 0.0
  113. -0.5  1.0  3.0 0.0 1.0
  114. -0.5  1.0  2.0 1.0 1.0
  115. -0.5  0.0   2.0 1.0 0.0
  117. // Lower hallway - R
  118. 0.5  1.0  3.0 0.0 1.0
  119. 0.5  0.0   3.0 0.0 0.0
  120. 0.5  0.0   2.0 1.0 0.0
  121. 0.5  1.0  3.0 0.0 1.0
  122. 0.5  1.0  2.0 1.0 1.0
  123. 0.5  0.0   2.0 1.0 0.0
  126. // Left hallway - Lw
  128. -3.0  1.0  0.5 1.0 1.0
  129. -3.0  0.0   0.5 1.0 0.0
  130. -2.0  0.0   0.5 0.0 0.0
  131. -3.0  1.0  0.5 1.0 1.0
  132. -2.0  1.0  0.5 0.0 1.0
  133. -2.0  0.0   0.5 0.0 0.0
  135. // Left hallway - Hi
  137. -3.0  1.0  -0.5 1.0 1.0
  138. -3.0  0.0   -0.5 1.0 0.0
  139. -2.0  0.0   -0.5 0.0 0.0
  140. -3.0  1.0  -0.5 1.0 1.0
  141. -2.0  1.0  -0.5 0.0 1.0
  142. -2.0  0.0   -0.5 0.0 0.0
  144. // Right hallway - Lw
  146. 3.0  1.0  0.5 1.0 1.0
  147. 3.0  0.0   0.5 1.0 0.0
  148. 2.0  0.0   0.5 0.0 0.0
  149. 3.0  1.0  0.5 1.0 1.0
  150. 2.0  1.0  0.5 0.0 1.0
  151. 2.0  0.0   0.5 0.0 0.0
  153. // Right hallway - Hi
  155. 3.0  1.0  -0.5 1.0 1.0
  156. 3.0  0.0   -0.5 1.0 0.0
  157. 2.0  0.0   -0.5 0.0 0.0
  158. 3.0  1.0  -0.5 1.0 1.0
  159. 2.0  1.0 -0.5 0.0 1.0
  160. 2.0  0.0   -0.5 0.0 0.0
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