tool
extends TileMap

## Dictates whether tileset collision information should be exposed to game context.
export var expose_collisions: bool = true

func _enter_tree() -> void:
    # It's okay to fail here for non-grid contexts.
    if get_parent().connect("cell_size_changed", self, "_update_cell_size"):
        _update_cell_size(get_parent().cell_size, get_parent().cell_size)

func _update_cell_size(_p_old_cell_size: Vector2, p_new_cell_size: Vector2) -> void:
    # We're assuming that all tile textures are of same dimensions.
    # todo: Diagnose mismatch by walking over all textures?
    var tileset_texture_size := tile_set.tile_get_texture(0).get_size()
    scale = p_new_cell_size / tileset_texture_size
    cell_size = p_new_cell_size / scale