level.c

   1 #include <GL/gl.h>
   2 #include <assimp/cimport.h>
   3 #include <stdlib.h>
   4
   5 #include "level.h"
   6 #include "logger.h"
   7
   8 static Block blockEmpty = { .type = BLOCKTYPE_SPACE,
   9                             .sceneData = NULL,
  10                             .textureIds = NULL };
  11 static Block blockWall01 = { .type = BLOCKTYPE_OBSTACLE,
  12                              .sceneData = NULL,
  13                              .textureIds = NULL };
  14
  15 static Block* testBlocks[9] = { &blockWall01, &blockWall01, &blockWall01,
  16                                 &blockEmpty, &blockEmpty, &blockEmpty,
  17                                 &blockWall01, &blockEmpty, &blockWall01 };
  18
  19 BlockGrid levelGrid = { .width = 3,
  20                         .depth = 3,
  21                         .blocks = testBlocks };
  22
  23 //static TgaImage* levelImage = NULL;
  24
  25 static const char* replaceFileExtension(const AiString path, const char* ext);
  26
  27 void initLevel() {
  28         const AiScene* sceneData = importScene("out/assets/wall01.3ds");
  29         blockWall01.sceneData = sceneData;
  30         if (sceneData != NULL) {
  31                 const unsigned int numTextures = sceneData->mNumMeshes;
  32
  33                 blockWall01.textureIds = malloc(numTextures * sizeof(GLuint));
  34                 glGenTextures(numTextures, blockWall01.textureIds);
  35
  36                 for (unsigned int i = 0; i < numTextures; ++i) {
  37                         glBindTexture(GL_TEXTURE_2D, blockWall01.textureIds[i]);
  38
  39                         AiString originalTexturePath;
  40                         if (aiGetMaterialTexture(sceneData->mMaterials[sceneData->mMeshes[i]->mMaterialIndex],
  41                                                  aiTextureType_DIFFUSE,
  42                                                  0,
  43                                                  &originalTexturePath,
  44                                                  NULL, NULL, NULL, NULL, NULL, NULL) == AI_SUCCESS) {
  45                                 const char* textureFile = replaceFileExtension(originalTexturePath, ".tga");
  46                                 size_t textureFileLength = strlen(textureFile);
  47                                 char* texturePath = malloc(strlen("out/assets/") + textureFileLength + 1);
  48                                 strcpy(texturePath, "out/assets/");
  49                                 strncat(texturePath, textureFile, textureFileLength);
  50                                 TgaImage* textureImage = readTga(texturePath);
  51                                 if (textureImage == NULL) {
  52                                         logError("Asset texture file not found: %s", texturePath);
  53                                 }
  54                                 else {
  55                                         glTexImage2D(GL_TEXTURE_2D,
  56                                                      0,
  57                                                      textureImage->imageComponents,
  58                                                      textureImage->header.imageWidth,
  59                                                      textureImage->header.imageHeight,
  60                                                      0,
  61                                                      textureImage->imageFormat,
  62                                                      GL_UNSIGNED_BYTE,
  63                                                      textureImage->bytes);
  64                                         free(textureImage->bytes);
  65                                 }
  66                         }
  67                 }
  68
  69                 glBindTexture(GL_TEXTURE_2D, 0);
  70         }
  71 }
  72
  73 void buildLevelFromImage(TgaImage* image) {
  74         if (image->header.imageBpp != 32) {
  75                 logError("Invalid level image format (%d bpp)", image->header.imageBpp);
  76                 return;
  77         }
  78 }
  79
  80 const AiScene* importScene(const char* path) {
  81         const AiScene* scene = aiImportFile(path, 0u);
  82         if (scene == NULL) {
  83                 logError("Failed to import asset from %s", path);
  84         }
  85         else if ((scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE) == AI_SCENE_FLAGS_INCOMPLETE) {
  86                 logError("Incomplete scene imported from %s", path);
  87                 aiReleaseImport(scene);
  88                 scene = NULL;
  89         }
  90         return scene;
  91         // TODO aiReleaseImport(scene);
  92 }
  93
  94 /** BUGS
  95  * The following function will not work properly with texture
  96  * file names (excluding directory part) beginning with '.'
  97  */
  98 static const char* replaceFileExtension(const AiString path, const char* ext) {
  99                 size_t lengthToCopy = path.length;
 100
 101                 char* lastDotSubstr = strrchr(path.data, '.');
 102                 if (lastDotSubstr != NULL) {
 103                         if (strpbrk(lastDotSubstr, "\\/") == NULL) {
 104                                 lengthToCopy = lastDotSubstr - path.data;
 105                         }
 106                 }
 107
 108                 size_t extLength = strlen(ext) + 1;
 109                 char* newPath = malloc(lengthToCopy + extLength);
 110                 strncpy(newPath, path.data, lengthToCopy);
 111                 strncpy(newPath + lengthToCopy, ext, extLength);
 112
 113                 return newPath;
 114 }