question: public ShapeTileSimplex ( ArrayList < PlaLineInt > p_line_arr ) { lines_list = p_line_arr ; Collections . sort ( lines_list ) ; }
target:  Constructs a Simplex from the directed lines in p_line_arr.  The simplex will not be normalized. To get a normalized simplex use TileShape.get_instance Careful, the arraylist is not copyed