Class: Piece

Inherits:
Object
  • Object
show all
Defined in:
lib/tetris/piece.rb

Constant Summary collapse

@@type_width = 
4

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Piece

Returns a new instance of Piece.



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# File 'lib/tetris/piece.rb', line 4

def initialize
  @@types ||= load_pieces($Pieces)

  @type = @@types.rand_item
  @rotation = 0
  @x = 0
  @y = 0
  @colour = $Colours.rand_item
end

Instance Method Details

#drop(map) ⇒ Object 



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# File 'lib/tetris/piece.rb', line 30

def drop(map)
  @y += 1 while not collision?(map, 0, 1)
end

#move(x, y, map) ⇒ Object 



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# File 'lib/tetris/piece.rb', line 23

def move(x, y, map)
  unless collision?(map, x, y)
    @x += x
    @y += y
  end
end

#rotate(map) ⇒ Object 



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# File 'lib/tetris/piece.rb', line 34

def rotate(map)
  @rotation = next_rotation unless collision?(map, 0, 0, @type[next_rotation])
end

#squares(piece = current) ⇒ Object 



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# File 'lib/tetris/piece.rb', line 14

def squares(piece=current)
  Enumerator.new do |yielder|
    piece.each_with_index do |tile, i|
      x, y = coords(i)
      yielder.yield(@x+x, @y+y, @colour) if tile
    end
  end
end

#update(map) ⇒ Object 



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# File 'lib/tetris/piece.rb', line 38

def update(map)
  if collision?(map, 0, 1)
    squares.each {|x, y, colour| map.set(x, y, colour)}
    initialize
  end
end