findPath from a border adjacent to a swamp returns an empty path
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Game.rooms.E27S3.findPath((new RoomPosition(28,0,'E27S3')),(new RoomPosition(24,15,'E27S3')),{maxRooms:2,maxOps:500000}) == []
Game.rooms.E27S3.findPath((new RoomPosition(28,0,'E27S3')),(new RoomPosition(24,15,'E27S3')),{maxRooms:1}) == a valid but inefficient path through the swampWhen there is a border adjacent to a swamp, something is going wrong in findPath, causing it to return an empty path rather than a path through the swamp or along the border. I have raised maxOps to a ridiculous number just to be sure that every tile in both rooms can be checked. Game.cpu.getUsed tells me that these attempts take about 0.5CPU, which the docs say is about 5000 ops, which is the right amount to consider every possible space in two rooms. The first example above should return a one-step path with a westward move, I think.
This is probably the same problem reported in these previous threads:
http://screeps.com/forum/topic/751/ERR-NO-PATH-when-changing-rooms
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confirmative.
Unbelievable it's still not fixed
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The
Room.findPathmethod only returns the path segment which corresponds to the current room. If it has an intention to change the room, then it will end on the room border. If you are already on the border, it will return an empty path. It is why you see an empty path withmaxRooms:2or a valid path withmaxRooms:1.If you want to see the full path spanning all rooms, use
PathFinder.searchinstead.
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@Artem in the given example, the creep should move along the border, not stand still, even in the destination room. Also, in the other room, the creep should find a path west or northwest. It does neither, getting an empty path there, too.
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If more thorough examples and test cases would help get this bug fixed, I would be willing to put them together.
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If more thorough examples and test cases would help get this bug fixed, I would be willing to put them together.
Sure, this always helps.
