Method buildTileData

Engine/source/navigation/navMesh.cpp:855–1093

}

unsigned char *NavMesh::buildTileData(const Tile &tile, TileData &data, U32 &dataSize)
{
   // Push out tile boundaries a bit.
   F32 tileBmin[3], tileBmax[3];
   rcVcopy(tileBmin, tile.bmin);
   rcVcopy(tileBmax, tile.bmax);
   tileBmin[0] -= cfg.borderSize * cfg.cs;
   tileBmin[2] -= cfg.borderSize * cfg.cs;
   tileBmax[0] += cfg.borderSize * cfg.cs;
   tileBmax[2] += cfg.borderSize * cfg.cs;

   // Parse objects from level into RC-compatible format.
   Box3F box = RCtoDTS(tileBmin, tileBmax);
   SceneContainer::CallbackInfo info;
   info.context = PLC_Navigation;
   info.boundingBox = box;
   data.geom.clear();
   info.polyList = &data.geom;
   info.key = this;
   getContainer()->findObjects(box, StaticObjectType | DynamicShapeObjectType, buildCallback, &info);

   // Parse water objects into the same list, but remember how much geometry was /not/ water.
   U32 nonWaterVertCount = data.geom.getVertCount();
   U32 nonWaterTriCount = data.geom.getTriCount();
   if(mWaterMethod != Ignore)
   {
      getContainer()->findObjects(box, WaterObjectType, buildCallback, &info);
   }

   // Check for no geometry.
   if (!data.geom.getVertCount())
   {
      data.geom.clear();
      return NULL;
   }

   // Figure out voxel dimensions of this tile.
   U32 width = 0, height = 0;
   width = cfg.tileSize + cfg.borderSize * 2;
   height = cfg.tileSize + cfg.borderSize * 2;

   // Create a heightfield to voxelise our input geometry.
   data.hf = rcAllocHeightfield();
   if(!data.hf)
   {
      Con::errorf("Out of memory (rcHeightField) for NavMesh %s", getIdString());
      return NULL;
   }
   if(!rcCreateHeightfield(ctx, *data.hf, width, height, tileBmin, tileBmax, cfg.cs, cfg.ch))
   {
      Con::errorf("Could not generate rcHeightField for NavMesh %s", getIdString());
      return NULL;
   }

   unsigned char *areas = new unsigned char[data.geom.getTriCount()];

   dMemset(areas, 0, data.geom.getTriCount() * sizeof(unsigned char));