script/piece.gd

   1 extends Node2D
   2 class_name Piece
   3
   4
   5 @export var piece_name: String = ""
   6
   7 var cells: Array[Cell] = []
   8 var block_size: int = 0
   9
  10 var _cell_grid: Array[Vector2i] = []
  11
  12 var _rotation_angles: Array[float] = [0.0, 90.0, 180.0, 270.0]
  13 var _rotation_index: int = 0
  14
  15
  16 func _ready() -> void:
  17         for c in self.get_children():
  18                 if c is Cell:
  19                         cells.append(c)
  20
  21         # all cells must have same block size
  22         for c in cells:
  23                 if block_size == 0:
  24                         block_size = c.block_size
  25                 else:
  26                         assert(block_size == c.block_size, "All cells must have same block size")
  27
  28         # build cell grid coordinates
  29         for c in cells:
  30                 var pos_x: int = floori(c.position.x / block_size)
  31                 var pos_y: int = floori(c.position.y / block_size)
  32                 _cell_grid.append(Vector2i(pos_x, pos_y))
  33
  34
  35 func _to_string() -> String:
  36         return "%d: %s" % [_rotation_angles[_rotation_index % _rotation_angles.size()], str(get_cell_grid())]
  37
  38
  39 func get_cell_grid() -> Array:
  40         var rot = _rotation_angles[_rotation_index % _rotation_angles.size()]
  41
  42         if rot == 0.0:
  43                 return _cell_grid.duplicate()
  44         elif rot == 90.0:
  45                 return _cell_grid.map(func f(v): return Vector2i(-v.y, v.x))
  46         elif rot == 180.0:
  47                 return _cell_grid.map(func f(v): return Vector2i(-v.x, -v.y))
  48         elif rot == 270.0:
  49                 return _cell_grid.map(func f(v): return Vector2i(v.y, -v.x))
  50         else:
  51                 assert(false, "Invalid rotation: " + str(rot))
  52         return _cell_grid.duplicate()
  53
  54
  55 func rotate_left():
  56         _rotation_index += 1
  57         var new_cell_grid = get_cell_grid()
  58
  59         for c in cells:
  60                 var new_pos: Vector2i = new_cell_grid.pop_front()
  61                 c.position.x = new_pos.x * block_size
  62                 c.position.y = new_pos.y * block_size