Grid - atom description

General description

• Grid atoms represent type of terrain on a vertex of any tiles.
• They do not hold graphical representation.
  • Surface atoms hold the graphical representation, but used Surface atom is determined by Grid atoms in its four vertices.
• In the image above they are the red rects.
  • Left and bottom Grit atom are of type soil and top and right are of type desert, so the result Surface atom is transition from soil to desert.