@@ -85,4 +85,9 @@ def get_unity8_binary_path():
87def get_grid_size():
87def get_grid_size():
88− os.getenv('GRID_UNIT_PX')
88+ grid_size = os.getenv('GRID_UNIT_PX')
89+ if grid_size is None:
91+ "Environment variable GRID_UNIT_PX has not been set."
93+ return int(grid_size)