X-Git-Url: http://git.purplebirdman.com/catris.git/blobdiff_plain/5b090c35e5d741efe235ce84a2dd124828858863..859af48f3aea3fd3dde07c42a79d795feb905761:/script/piece.gd

diff --git a/script/piece.gd b/script/piece.gd
index aa50f0a..fb82e44 100644
--- a/script/piece.gd
+++ b/script/piece.gd
@@ -7,7 +7,11 @@ class_name Piece
 var cells: Array[Cell] = []
 var block_size: int = 0
 
-var cell_grid: Array[Vector2i] = []
+var _cell_grid: Array[Vector2i] = []
+
+var _rotation_angles: Array[float] = [0.0, 90.0, 180.0, 270.0]
+var _rotation_index: int = 0
+
 
 func _ready() -> void:
 	for c in self.get_children():
@@ -25,4 +29,34 @@ func _ready() -> void:
 	for c in cells:
 		var pos_x: int = floori(c.position.x / block_size)
 		var pos_y: int = floori(c.position.y / block_size)
-		cell_grid.append(Vector2i(pos_x, pos_y))
+		_cell_grid.append(Vector2i(pos_x, pos_y))
+
+
+func _to_string() -> String:
+	return "%d: %s" % [_rotation_angles[_rotation_index % _rotation_angles.size()], str(get_cell_grid())]
+
+
+func get_cell_grid() -> Array:
+	var rot = _rotation_angles[_rotation_index % _rotation_angles.size()]
+	
+	if rot == 0.0:
+		return _cell_grid.duplicate()
+	elif rot == 90.0:
+		return _cell_grid.map(func f(v): return Vector2i(-v.y, v.x))
+	elif rot == 180.0:
+		return _cell_grid.map(func f(v): return Vector2i(-v.x, -v.y))
+	elif rot == 270.0:
+		return _cell_grid.map(func f(v): return Vector2i(v.y, -v.x))
+	else:
+		assert(false, "Invalid rotation: " + str(rot))
+	return _cell_grid.duplicate()
+
+
+func rotate_left():
+	_rotation_index += 1
+	var new_cell_grid = get_cell_grid()
+	
+	for c in cells:
+		var new_pos: Vector2i = new_cell_grid.pop_front()
+		c.position.x = new_pos.x * block_size
+		c.position.y = new_pos.y * block_size