level.c

   1 #include <GL/gl.h>
   2 #include <assimp/cimport.h>
   3 #include <assimp/postprocess.h>
   4 #include <stdlib.h>
   5
   6 #include "level.h"
   7 #include "logger.h"
   8
   9 static Block blockEmpty = { .type = BLOCKTYPE_SPACE,
  10                             .sceneData = NULL,
  11                             .textureIds = NULL };
  12 static Block blockWall01 = { .type = BLOCKTYPE_OBSTACLE,
  13                              .sceneData = NULL,
  14                              .textureIds = NULL };
  15
  16 static Block* testBlocks[9] = { &blockWall01, &blockWall01, &blockWall01,
  17                                 &blockEmpty, &blockEmpty, &blockEmpty,
  18                                 &blockWall01, &blockEmpty, &blockWall01 };
  19
  20 BlockGrid levelGrid = { .width = 3,
  21                         .depth = 3,
  22                         .blocks = testBlocks };
  23
  24 //static TgaImage* levelImage = NULL;
  25
  26 static const char* replaceFileExtension(const AiString path, const char* ext);
  27
  28 void initLevel() {
  29         const AiScene* sceneData = importScene("out/assets/wall01.3ds");
  30         blockWall01.sceneData = sceneData;
  31         if (sceneData != NULL) {
  32                 const unsigned int numTextures = sceneData->mNumMeshes;
  33
  34                 blockWall01.textureIds = malloc(numTextures * sizeof(GLuint));
  35                 glGenTextures(numTextures, blockWall01.textureIds);
  36
  37                 for (unsigned int i = 0; i < numTextures; ++i) {
  38                         glBindTexture(GL_TEXTURE_2D, blockWall01.textureIds[i]);
  39
  40                         AiString originalTexturePath;
  41                         if (aiGetMaterialTexture(sceneData->mMaterials[sceneData->mMeshes[i]->mMaterialIndex],
  42                                                  aiTextureType_DIFFUSE,
  43                                                  0,
  44                                                  &originalTexturePath,
  45                                                  NULL, NULL, NULL, NULL, NULL, NULL) == AI_SUCCESS) {
  46                                 const char* textureFile = replaceFileExtension(originalTexturePath, ".tga");
  47                                 size_t textureFileLength = strlen(textureFile);
  48                                 char* texturePath = malloc(strlen("out/assets/") + textureFileLength + 1);
  49                                 strcpy(texturePath, "out/assets/");
  50                                 strncat(texturePath, textureFile, textureFileLength);
  51                                 TgaImage* textureImage = readTga(texturePath);
  52                                 if (textureImage == NULL) {
  53                                         logError("Asset texture file not found: %s", texturePath);
  54                                 }
  55                                 else {
  56                                         glTexImage2D(GL_TEXTURE_2D,
  57                                                      0,
  58                                                      textureImage->imageComponents,
  59                                                      textureImage->header.imageWidth,
  60                                                      textureImage->header.imageHeight,
  61                                                      0,
  62                                                      textureImage->imageFormat,
  63                                                      GL_UNSIGNED_BYTE,
  64                                                      textureImage->bytes);
  65                                         free(textureImage->bytes);
  66                                 }
  67                         }
  68                 }
  69
  70                 glBindTexture(GL_TEXTURE_2D, 0);
  71         }
  72 }
  73
  74 void buildLevelFromImage(TgaImage* image) {
  75         if (image->header.imageBpp != 32) {
  76                 logError("Invalid level image format (%d bpp)", image->header.imageBpp);
  77                 return;
  78         }
  79 }
  80
  81 const AiScene* importScene(const char* path) {
  82         const AiScene* scene = aiImportFile(path, aiProcess_PreTransformVertices);
  83         if (scene == NULL) {
  84                 logError("Failed to import asset from %s", path);
  85         }
  86         else if ((scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE) == AI_SCENE_FLAGS_INCOMPLETE) {
  87                 logError("Incomplete scene imported from %s", path);
  88                 aiReleaseImport(scene);
  89                 scene = NULL;
  90         }
  91         return scene;
  92         // TODO aiReleaseImport(scene);
  93 }
  94
  95 /** BUGS
  96  * The following function will not work properly with texture
  97  * file names (excluding directory part) beginning with '.'
  98  */
  99 static const char* replaceFileExtension(const AiString path, const char* ext) {
 100                 size_t lengthToCopy = path.length;
 101
 102                 char* lastDotSubstr = strrchr(path.data, '.');
 103                 if (lastDotSubstr != NULL) {
 104                         if (strpbrk(lastDotSubstr, "\\/") == NULL) {
 105                                 lengthToCopy = lastDotSubstr - path.data;
 106                         }
 107                 }
 108
 109                 size_t extLength = strlen(ext) + 1;
 110                 char* newPath = malloc(lengthToCopy + extLength);
 111                 strncpy(newPath, path.data, lengthToCopy);
 112                 strncpy(newPath + lengthToCopy, ext, extLength);
 113
 114                 return newPath;
 115 }