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