class Block

Constants

PATTERN

Attributes

pattern[RW]

rotation[RW]

upper_left[RW]

Public Class Methods

new(pattern, upper_left) click to toggle source

# File lib/block.rb, line 20
def initialize(pattern, upper_left)
  @pattern, @upper_left, @rotation = pattern, upper_left, 0
end

random(upper_left) click to toggle source

# File lib/block.rb, line 24
def self.random(upper_left)
  Block.new(PATTERN.sample, upper_left)
end

Public Instance Methods

get_vectors(rotation) click to toggle source

# File lib/block.rb, line 36
def get_vectors(rotation)
  vectors = @pattern.pattern
  
  (rotation.abs % 4 ).times do
    vectors.map! do |coord|
      rotation > 0 ? rotate_coord_right(coord) : rotate_coord_left(coord)
    end
  end
  
  vectors
end

rotate_coord_left(coord) click to toggle source

# File lib/block.rb, line 54
def rotate_coord_left(coord)
  i, j = coord
  size = @pattern.size
  [(size - 1) - j, i]
end

rotate_coord_right(coord) click to toggle source

# File lib/block.rb, line 48
def rotate_coord_right(coord)
  i, j = coord
  size = @pattern.size
  [j , (size - 1) - i]
end

spaces_occupied(options = {}) click to toggle source

# File lib/block.rb, line 28
def spaces_occupied(options = {})
  rotation = options[:rotation] || @rotation
  pos = options[:pos] || @upper_left
  get_vectors(rotation).map do |vector|
    [vector.first + pos.first, vector.last + pos.last]
  end
end