OpenGL实现三维迷宫游戏 源码下载

/*/ // MD2 Viewer (c) 1999 by Mete Ciragan // // file: md2.c // last modified: Apr 28 1999, Mete Ciragan // copyright: The programs and associated files contained in this // distribution were developed by Mete Ciragan. The programs // are not in the public domain, but they are freely // distributable without licensing fees. These programs are // provided without guarantee or warrantee expressed or // implied. // // version: 1.4 // // email: mete@swissquake.ch // web: http://www.swissquake.ch/chumbalum-soft/ /*/ #include <stdio.h> #include <stdlib.h> #include <string.h> /* memset */ #include <math.h> /* sqrt */ //#include <mx/gl.h> #include <windows.h> #include <gl/gl.h> #include "md2.h" #define NUMVERTEXNORMALS 162 float avertexnormals[NUMVERTEXNORMALS][3] = { #include "anorms.h" }; static int g_glcmds = 1; /* use glcommands */ static int g_interp = 1; /* interpolate frames */ /* * load model */ md2_model_t* md2_readModel (const char *filename) { FILE *file; md2_model_t *model; byte buffer[MD2_MAX_FRAMESIZE]; int i; model = (md2_model_t *) malloc (sizeof (md2_model_t)); if (!model) return 0; file = fopen (filename, "rb"); if (!file) { free (model); return 0; } /* initialize model and read header */ memset (model, 0, sizeof (md2_model_t)); fread (&model->header, sizeof (md2_header_t), 1, file); #if 0 printf ("magic:\t\t%d\n", model->header.magic); printf ("version:\t\t%d\n", model->header.version); printf ("skinWidth:\t\t%d\n", model->header.skinWidth); printf ("skinHeight:\t\t%d\n", model->header.skinHeight); printf ("frameSize:\t\t%d\n", model->header.frameSize); printf ("numSkins:\t\t%d\n", model->header.numSkins); printf ("numVertices:\t\t%d\n", model->header.numVertices); printf ("numTexCoords:\t\t%d\n", model->header.numTexCoords); printf ("numTriangles:\t\t%d\n", model->header.numTriangles); printf ("numGlCommands:\t\t%d\n", model->header.numGlCommands); printf ("numFrames:\t\t%d\n", model->header.numFrames); printf ("offsetSkins:\t\t%d\n", model->header.offsetSkins); printf ("offsetTexCoords:\t%d\n", model->header.offsetTexCoords); printf ("offsetTriangles:\t%d\n", model->header.offsetTriangles); printf ("offsetFrames:\t\t%d\n", model->header.offsetFrames); printf ("offsetGlCommands:\t%d\n", model->header.offsetGlCommands); printf ("offsetEnd:\t\t%d\n", model->header.offsetEnd); #endif if (model->header.magic != (int) (('2' << 24) + ('P' << 16) + ('D' << 8) + 'I')) { fclose (file); free (model); return 0; } /* read skins */ fseek (file, model->header.offsetSkins, SEEK_SET); if (model->header.numSkins > 0) { model->skins = (md2_skin_t *) malloc (sizeof (md2_skin_t) * model->header.numSkins); if (!model->skins) { md2_freeModel (model); return 0; } for (i = 0; i < model->header.numSkins; i++) fread (&model->skins[i], sizeof (md2_skin_t), 1, file); } /* read texture coordinates */ fseek (file, model->header.offsetTexCoords, SEEK_SET); if (model->header.numTexCoords > 0) { model->texCoords = (md2_textureCoordinate_t *) malloc (sizeof (md2_textureCoordinate_t) * model->header.numTexCoords); if (!model->texCoords) { md2_freeModel (model); return 0; } for (i = 0; i < model->header.numTexCoords; i++) fread (&model->texCoords[i], sizeof (md2_textureCoordinate_t), 1, file); } /* read triangles */ fseek (file, model->header.offsetTriangles, SEEK_SET); if (model->header.numTriangles > 0) { model->triangles = (md2_triangle_t *) malloc (sizeof (md2_triangle_t) * model->header.numTriangles); if (!model->triangles) { md2_freeModel (model); return 0; } for (i = 0; i < model->header.numTriangles; i++) fread (&model->triangles[i], sizeof (md2_triangle_t), 1, file); } /* read alias frames */ fseek (file, model->header.offsetFrames, SEEK_SET); if (model->header.numFrames > 0) { model->frames = (md2_frame_t *) malloc (sizeof (md2_frame_t) * model->header.numFrames); if (!model->frames) { md2_freeModel (model); return 0; } for (i = 0; i < model->header.numFrames; i++) { md2_alias_frame_t *frame = (md2_alias_frame_t *) buffer; int j; model->frames[i].vertices = (md2_triangleVertex_t *) malloc (sizeof (md2_triangleVertex_t) * model->header.numVertices); if (!model->frames[i].vertices) { md2_freeModel (model); return 0; } fread (frame, 1, model->header.frameSize, file); strcpy (model->frames[i].name, frame->name); for (j = 0; j < model->header.numVertices; j++) { model->frames[i].vertices[j].vertex[0] = (float) ((int) frame->alias_vertices[j].vertex[0]) * frame->scale[0] + frame->translate[0]; model->frames[i].vertices[j].vertex[2] = -1* ((float) ((int) frame->alias_vertices[j].vertex[1]) * frame->scale[1] + frame->translate[1]); model->frames[i].vertices[j].vertex[1] = (float) ((int) frame->alias_vertices[j].vertex[2]) * frame->scale[2] + frame->translate[2]; model->frames[i].vertices[j].normal[0] = avertexnormals[frame->alias_vertices[j].lightNormalIndex][0]; model->frames[i].vertices[j].normal[1] = avertexnormals[frame->alias_vertices[j].lightNormalIndex][1]; model->frames[i].vertices[j].normal[2] = avertexnormals[frame->alias_vertices[j].lightNormalIndex][2]; //model->frames[i].vertices[j].lightNormalIndex = frame->alias_vertices[j].lightNormalIndex; } } } /* read gl commands */ fseek (file, model->header.offsetGlCommands, SEEK_SET); if (model->header.numGlCommands) { model->glCommandBuffer = (int *) malloc (sizeof (int) * model->header.numGlCommands); if (!model->glCommandBuffer) { md2_freeModel (model); return 0; } fread (model->glCommandBuffer, sizeof (int), model->header.numGlCommands, file); } fclose (file); return model; } /* * free model */ void md2_freeModel (md2_model_t *model) { if (model) { if (model->skins) free (model->skins); if (model->texCoords) free (model->texCoords); if (model->triangles) free (model->triangles); if (model->frames) { int i; for (i = 0; i < model->header.numFrames; i++) { if (model->frames[i].vertices) free (model->frames[i].vertices); } free (model->frames); } if (model->glCommandBuffer) free (model->glCommandBuffer); free (model); } } /* * set draw style, either with glcommands, interpolated */ void md2_setStyle (int glcmds, int interp) { g_glcmds = glcmds; g_interp = interp; } /* * center model * */ void md2_getBoundingBox (md2_model_t *model, float *minmax) { int i; float minx, maxx; float miny, maxy; float minz, maxz; minx = miny = minz = 999999.0f; maxx = maxy = maxz = -999999.0f; /* get bounding box */ for (i = 0; i < model->header.numVertices; i++) { md2_triangleVertex_t *v = &model->frames[0].vertices[i]; if (v->vertex[0] < minx) minx = v->vertex[0]; else if (v->vertex[0] > maxx) maxx = v->vertex[0]; if (v->vertex[1] < miny) miny = v->vertex[1]; else if (v->vertex[1] > maxy) maxy = v->vertex[1]; if (v->vertex[2] < minz) minz = v->vertex[2]; else if (v->vertex[2] > maxz) maxz = v->vertex[2]; } minmax[0] = minx; minmax[1] = maxx; minmax[2] = miny; minmax[3] = maxy; minmax[4] = minz; minmax[5] = maxz; } /* * draw normal * */ void _md2_drawModel (md2_model_t *model, int frame) { int i; md2_frame_t *f = &model->frames[frame]; glBegin (GL_TRIANGLES); for (i = 0; i < model->header.numTriangles; i++) { md2_triangle_t *t = &model->triangles[i]; //int lightNormalIndex; /* lightNormalInde