Function InitTerrain

Descent3/terrain.cpp:943–1025

}

void InitTerrain(void) {
  int i, w, h, t;

  // set sky texture to unused
  Terrain_sky.textured = 0;

  // Setup stuff for rendering
  if (!Dedicated_server) {
    Terrain_rotate_list = (uint16_t *)mem_malloc(TERRAIN_WIDTH * TERRAIN_DEPTH * sizeof(uint16_t));
    ASSERT(Terrain_rotate_list);

    World_point_buffer = (g3Point *)mem_malloc(TERRAIN_WIDTH * TERRAIN_DEPTH * sizeof(g3Point));
    ASSERT(World_point_buffer);

    // Allocate space for lod delta tree and unique texture IDs
    for (i = 0; i < MAX_TERRAIN_LOD - 1; i++) {
      w = TERRAIN_WIDTH >> ((MAX_TERRAIN_LOD - 1) - i);
      h = TERRAIN_DEPTH >> ((MAX_TERRAIN_LOD - 1) - i);

      TerrainDeltaBlocks[i] = (float *)mem_malloc(w * h * sizeof(float));
    }
  }

  // Allocate space for lod normals

  for (i = MAX_TERRAIN_LOD - 1; i < MAX_TERRAIN_LOD; i++) {
    w = TERRAIN_WIDTH >> ((MAX_TERRAIN_LOD - 1) - i);
    h = TERRAIN_DEPTH >> ((MAX_TERRAIN_LOD - 1) - i);

    TerrainNormals[i] = (terrain_normals *)mem_malloc(w * h * sizeof(terrain_normals));
    memset(TerrainNormals[i], 0, w * h * sizeof(terrain_normals));
  }

  // Allocate space for our min/max tables
  for (i = 0; i < 7; i++) {
    w = 1 << i;
    h = 1 << i;

    // Index 1 cuts the whole thing into 4ths, index 2 into 8ths, etc
    Terrain_min_height_int[i] = (uint8_t *)mem_malloc(w * h * sizeof(uint8_t));
    Terrain_max_height_int[i] = (uint8_t *)mem_malloc(w * h * sizeof(uint8_t));

    ASSERT(Terrain_min_height_int[i] != NULL);
    ASSERT(Terrain_max_height_int[i] != NULL);
  }

  Terrain_sky.lightangle = 0;
  Terrain_sky.num_satellites = 1;
  Terrain_sky.damage_per_second = 0;

  SetupSky(SKY_RADIUS, TF_STARS | TF_SATELLITES, 1);
  GenerateLightSource();

  for (i = 0; i < 4; i++) {
    TerrainLightmaps[i] = lm_AllocLightmap(128, 128);
    ASSERT(TerrainLightmaps[i] != BAD_LM_INDEX);
    GameLightmaps[TerrainLightmaps[i]].flags |= LF_WRAP;
  }