Rendered map doesn't match PG_MAP_FILE

[mimi89999]

Hello,

I noticed that the rendered map doesn't match the PG_MAP_FILE map config.

1. Define the map_config as

   def create_map():
   return dict(
   type=MapGenerateMethod.PG_MAP_FILE,
   lane_num=2,
   lane_width=3.5,
   config=[
     {
       "id": "S",
       "pre_block_socket_index": 0,
       "length": 60,
     },
     {
       "id": "C",
       "pre_block_socket_index": 0,
       "length": 60,
       "radius": 600,
       "angle": 45,
       "dir": 0,
     },
     {
       "id": "C",
       "pre_block_socket_index": 0,
       "length": 60,
       "radius": 600,
       "angle": 45,
       "dir": 1,
     },
   ]
   )

2. draw_top_down_map. Notice that it does match the defined config
3. Run MetaDrive. There, the map will end after the first left curve.

[fredyshox]

This road map exceeds the default map region size of 1024. Try increasing it (max is 2048). Also by default pg map starts at point [0, 0], which is the center of the map. You can change it using map_config.start_position if you need more space.

[mimi89999]

I think that would be good if MetaDrive showed a warning in such a case.

[QuanyiLi]

Yeah. We should at least have a warning printed. Or we can have some visualization hints to remind users about this. For example, we can print the boundary of the map_region with red color on the terrain.