Combining Polygons

[hlalljie]

Godot Version

4.3

Question

Hey, anyone know how to combine collision polygons. I have some collision polygons being created by tiles and I want to combine them into one polygon using merge_polygons, but the combined polygon is not correct.

In the image the larger teal polygon is a few tile collision boxes next to each other. The smaller rectangle on the top right is my attempt at combining them with merge_polygons.

Here is the code:

# create new collision polygon
var new_collision_polygon: PackedVector2Array = PackedVector2Array()
  for cell in get_used_cells():
    var parent_tile_data: TileData = parent_layer.get_cell_tile_data(cell)
    # merge parent's collision polygon with new collision polygon
    var parent_poly: PackedVector2Array = parent_tile_data.get_collision_polygon_points(0, 0)
    new_collision_polygon = Geometry2D.merge_polygons(new_collision_polygon, parent_poly)[0]
    # remove parent tile data's collision polygon
    # parent_tile_data.remove_collision_polygon(0, 0)
    
#set hurt collision polygon to our new combined collision polygon
print(new_collision_polygon)
var hurt_collision_polygon: ConvexPolygonShape2D = ConvexPolygonShape2D.new()
hurt_collision_polygon.set_points(new_collision_polygon)
hurt_collision_shape.set_shape(hurt_collision_polygon)

Any help appreciated!