Grid wip

systems/grid_highlighter.gd

@@ -0,0 +1,29 @@
+extends Node2D
+
+@onready var grid: Grid = get_parent()
+
+const UNIT_COLOR = Color.CHOCOLATE
+const EMPTY_COLOR = Color(Color.CORNFLOWER_BLUE,1.0)
+
+var units: Array[Vector2]
+var empty: Array[Vector2]
+
+func _ready() -> void:
+	GameplaySignalBus.highlight_empty.connect(on_highlight_empty)
+	GameplaySignalBus.highlight_units.connect(on_highlight_units)
+
+func _draw() -> void:
+	for unit in units:
+		draw_rect(Rect2(unit,grid.cell_size),UNIT_COLOR)
+	for empty_cell in empty:
+		draw_rect(Rect2(empty_cell,grid.cell_size),EMPTY_COLOR)
+
+func on_highlight_units(new_units: Array[Unit]):
+	units.clear()
+	units.assign(new_units.map(func(unit : Unit): return grid.snap_position(unit.global_position)))
+	queue_redraw()
+
+func on_highlight_empty(new_empty: Array[int]):
+	empty.clear()
+	empty.assign(new_empty.map(func(cell: int): return grid.from_index(cell)))
+	queue_redraw()