1 files changed, 40 insertions, 0 deletions
diff --git a/game.gd b/game.gd
new file mode 100644
index 0000000..4e6074f
--- /dev/null
+++ b/game.gd
@@ -0,0 +1,40 @@
+extends Node
+
+
+signal speed_changed
+var speed := 1.0 :
+	set(value):
+		speed = value
+		speed_changed.emit()
+
+signal score_changed
+var score := 0 :
+	set(value):
+		score = value
+		score_changed.emit()
+
+
+func erase_map(points: PackedVector2Array, collision_container: StaticBody2D, visibility_container: Node2D):
+	var collision_polygons = collision_container.get_children()
+	var visibility_polygons = visibility_container.get_children()
+	
+	for idx in range(collision_polygons.size()):
+		var collision_node: CollisionPolygon2D = collision_polygons[idx]
+		var visibility_node: Polygon2D = visibility_polygons[idx]
+		
+		var clipped = Geometry2D.clip_polygons(collision_node.polygon, points)
+		
+		if clipped.size() > 0 and not Geometry2D.is_polygon_clockwise(clipped[0]):
+			collision_node.polygon = clipped[0]
+			visibility_node.polygon = clipped[0]
+			
+			if clipped.size() > 1 and not Geometry2D.is_polygon_clockwise(clipped[1]):
+				var collision_polygon = CollisionPolygon2D.new()
+				collision_polygon.polygon = clipped[1]
+				collision_container.add_child(collision_polygon)
+				
+				var visibility_polygon = Polygon2D.new()
+				visibility_polygon.polygon = clipped[1]
+				visibility_polygon.clip_children = CanvasItem.CLIP_CHILDREN_ONLY
+				visibility_polygon.add_child(visibility_node.get_node("TileMapLayer").duplicate())
+				visibility_container.add_child(visibility_polygon)