script/board.gd

   1 extends Control
   2 class_name Board
   3
   4
   5 signal added_piece
   6 signal end_round
   7
   8
   9 @export var block_size: int = 20
  10 @export var piece_catalogue: Array[PackedScene] = []
  11
  12 var _grid_filled: Array[bool] = []
  13 var _player_position: Vector2i = Vector2i.ZERO
  14 var _player_piece: Piece = null
  15 var _grid_final_y_row: int = 0
  16 var _grid_final_x_row: int = 0
  17
  18 var num_pieces: int = 0
  19 const start_pos: Vector2i = Vector2i(5, 2)
  20
  21 func _ready() -> void:
  22         assert(piece_catalogue.size() >= 1, "Expected at least one piece in catalogue")
  23
  24         # calculate grid
  25         _grid_final_y_row = size.y / block_size
  26         _grid_final_x_row = size.x / block_size
  27         print("Grid is " + str(_grid_final_x_row) + " by " + str(_grid_final_y_row))
  28
  29         for i in range(0, _grid_final_x_row):
  30                 for j in range(0, _grid_final_y_row):
  31                         _grid_filled.append(false)
  32
  33         _on_turn_timer_timeout()
  34
  35
  36 func _input(event: InputEvent) -> void:
  37         if event.is_action_pressed("player_left"):
  38                 _move(Vector2i(-1, 0))
  39         elif event.is_action_pressed("player_right"):
  40                 _move(Vector2i(1, 0))
  41
  42         if event.is_action_pressed("player_up"):
  43                 if _player_piece:
  44                         _player_piece.rotate_left()
  45                         print(_player_piece.to_string())
  46
  47         if event.is_action_pressed("player_down"):
  48                 # move piece to bottom
  49                 var b := true
  50                 while b:
  51                         b = _move(Vector2i(0, 1))
  52
  53
  54 func _add_player_piece():
  55         var scene: PackedScene = piece_catalogue.pick_random()
  56         var piece: Piece = scene.instantiate()
  57         piece.block_size = block_size
  58
  59         # TODO: start piece at center of board
  60         _player_position = start_pos
  61         piece.position = _player_position * block_size
  62         _player_piece = piece
  63
  64         # add piece to scene tree and emit signal
  65         add_child(piece)
  66         num_pieces += 1
  67         added_piece.emit()
  68
  69
  70 # returns TRUE if piece can move more, FALSE if end state
  71 func _move(v: Vector2i) -> bool:
  72         assert(_player_piece != null, "Player piece must not be null")
  73
  74         var new_player_position: Vector2i = _player_position + v
  75
  76         # for each cell in the block, offset it by new position and check for collision
  77         for pos: Vector2i in _player_piece.get_cell_grid():
  78                 pos += new_player_position
  79                 if pos.x < 0 or pos.x >= _grid_final_x_row:
  80                         # ignore input that moves beyond lateral boundaries
  81                         return false
  82
  83                 if _is_grid_position_taken(pos):
  84                         # if movement is vertical and blocked, then we're done
  85                         if v.y != 0:
  86                                 end_round.emit()
  87                         return false
  88
  89         # update player position
  90         _player_position = new_player_position
  91         if _player_piece:
  92                 _player_piece.position = _player_position * block_size
  93
  94         # if any cell's at the bottom of the grid, we're done
  95         for pos: Vector2i in _player_piece.get_cell_grid():
  96                 pos += _player_position
  97                 if (pos.y >= _grid_final_y_row - 1):
  98                         end_round.emit()
  99                         return false
 100
 101         return true
 102
 103
 104 func _on_end_round():
 105                 # disconnect player controls from current piece
 106                 var piece: Piece = _player_piece
 107                 _player_piece = null
 108
 109                 # fill in collision grid with piece cells
 110                 for pos: Vector2i in piece.get_cell_grid():
 111                         pos += _player_position
 112                         _set_grid_position(pos, true)
 113
 114                 # now start a new round
 115                 _on_turn_timer_timeout()
 116
 117
 118 func _on_turn_timer_timeout() -> void:
 119         if _player_piece == null:
 120                 _add_player_piece()
 121         else:
 122                 _move(Vector2i(0, 1))
 123         %turnTimer.start()
 124
 125
 126 func _set_grid_position(v: Vector2i, b: bool):
 127         _grid_filled[v.x + v.y * _grid_final_x_row] = b
 128
 129
 130 func _is_grid_position_taken(v: Vector2i) -> bool:
 131         return _grid_filled[v.x + v.y * _grid_final_x_row]