Function GetDYVector

Descent3/TerrainSearch.cpp:296–310

}

static inline vector *GetDYVector(int h) {
  vector *dyp;

  dyp = &Terrain_y_cache[h];

  if (!Terrain_y_flags[h]) {
    vector up_vector = {0, h * TERRAIN_HEIGHT_INCREMENT, 0};

    *dyp = up_vector * *TS_View_matrix;

    Terrain_y_flags[h] = 1;
  }

  return dyp;
}

static inline void GetPreRotatedPointFast(vector *dest, int x, int z, int yvalue) {
  ASSERT(yvalue >= 0 && yvalue <= 255);