How can I consolidate individual Tile collision shapes into large collision polygons from a TileMap?

system · August 19, 2020, 2:00am


	Attention	Topic was automatically imported from the old Question2Answer platform.
	Asked By	Meowsolini

I have a TileMap node named CollisionTileMap. Each of the 21 Tiles in the TileMap’s TileSet has a different shape (1 is square, some are triangular, and some are a mix of both).

Instead of having a different collision shape at each cell where I place a Tile, I want to merge each of these individual shapes with each other to form consolidated collision polygons.

that would be amazing and would solve collision problems at the tile edges.

collisionshaped | 2022-04-23 18:01

system · February 7, 2023, 3:17pm


	Reply From:	afk_mario

Ended up implementing it using the Geometry class to support multiple polygons and I think even holes are generated correctly.

gist.github.com

https://gist.github.com/afk-mario/15b5855ccce145516d1b458acfe29a28

level-post-import-bake-wall-collision-polygon.gd

# https://stackoverflow.com/questions/67412060/godot-engine-merging-more-than-two-polygons-using-geometrys-merge-polygons-2d
# https://github.com/a327ex/a327ex-template/blob/dd0a63aefbc3cae268d165deef8fdf931f776f55/engine/map/tilemap.lua
# https://github.com/a327ex/blog/issues/5
# https://godotengine.org/qa/30006/build-a-collision-polygon-from-tilemap-outline
tool
extends Node

var walls_layer := 2

func post_import(level: Node2D) -> Node2D:

This file has been truncated. show original

Polygons generated from tilemap

This post goes into more detail on how it works.

Another post that helped me:

https://forum.godotengine.org/30006/build-a-collision-polygon-from-tilemap-outline
answered 2 minutes ago by afk_mario (22 points)