class_name TileMarker
extends Node2D
## Marks the tile under the mouse, drawn by `art`: one way when the figure
## can reach it, another when it is too far away.

var tile := Vector2i(-1, -1)
var in_reach := false
var art: Art


## Moves the mark to `new_tile`. Redraws only when something changed.
func show_tile(new_tile: Vector2i, reachable: bool) -> void:
	if new_tile == tile and reachable == in_reach:
		return
	tile = new_tile
	in_reach = reachable
	queue_redraw()


func _draw() -> void:
	if art == null:
		return
	var size := GridMotion.TILE_SIZE
	art.draw(self, Art.MARKER, Rect2(Vector2(tile) * size, Vector2(size, size)), {"reachable": in_reach})