Function ReadTerrainChunks

Descent3/LoadLevel.cpp:3437–3476

// MUST BE SAVED BEFORE OBJECTS because of ResetTerrain

void ReadTerrainChunks(CFILE *fp, int version) {
  char chunk_name[4];
  int terr_chunk_start, terr_chunk_size;
  int done = 0;

  ResetTerrain();

  while (!done) {
    cf_ReadBytes((uint8_t *)chunk_name, 4, fp);
    terr_chunk_start = cftell(fp);
    terr_chunk_size = cf_ReadInt(fp);

    LoadLevelProgress(LOAD_PROGRESS_LOADING_LEVEL,
                      (filelen) ? (float)(terr_chunk_start + terr_chunk_size) / (float)filelen : 0.0f, NULL);

    if (ISCHUNK(CHUNK_TERRAIN_HEIGHT)) {
      ReadTerrainHeightChunk(fp, version);
    } else if (ISCHUNK(CHUNK_TERRAIN_TMAPS_FLAGS)) {
      ReadTerrainTmapFlagChunk(fp, version);
    } else if (ISCHUNK(CHUNK_TERRAIN_SKY)) {
      ReadTerrainSkyAndLightChunk(fp, version);
    } else if (ISCHUNK(CHUNK_TERRAIN_END)) {
      done = 1;
      cfseek(fp, terr_chunk_start + terr_chunk_size, SEEK_SET);
      continue;
    }
    // else unknown chunk
    cfseek(fp, terr_chunk_start + terr_chunk_size, SEEK_SET);
  }

  // Generate needed info
  BuildMinMaxTerrain();
  BuildTerrainNormals();
  UpdateTerrainLightmaps();

#if (defined(EDITOR) || defined(NEWEDITOR))
  memset(TerrainSelected, 0, TERRAIN_WIDTH * TERRAIN_DEPTH);
  Num_terrain_selected = 0;
#endif
}

// Read the texture names & build the xlate table
void ReadTextureList(CFILE *ifile) { BuildXlateTable(ifile, FindTextureName, texture_xlate, MAX_TEXTURES, -1); }