Contents

module FeedBo
  module Transformable

    attr_accessor :direction
  
    def initialize
      super
      @direction = 2
    end

    def move_frame
      x_movement = case @direction
        when 0,4 then 0
        when 1,2,3 then 1
        when 5,6,7 then -1
      end
      y_movement = case @direction
        when 2,6 then 0
        when 3,4,5 then 1
        when 7,0,1 then -1
      end
      unless @level.position_blocked? @position[0]+0.25*x_movement, @position[1]+0.25*y_movement
        @position[0] += 0.25 * x_movement
        @position[1] += 0.25 * y_movement
      end
    end
  
    def turn_left_frame(speed=1)
      @direction -= 0.25 * speed
      @direction += 8 if @direction < 0
      rotate(-11.25 * speed)
    end
  
    def turn_right_frame(speed=1)
      @direction += 0.25 * speed
      @direction -= 8 if @direction >= 8
      rotate(11.25 * speed)
    end
  
    protected
  
    def rotate(degrees)
      radians = degrees * Math::PI / 180
      s = Level::FIELD_SIZE / 2
      @points.map! { |p| [p[0]-s, p[1]-s] }
      @points.map! do |p|
        [ Math.cos(radians) * p[0] - Math.sin(radians) * p[1],
          Math.sin(radians) * p[0] + Math.cos(radians) * p[1] ]
      end
      @points.map! { |p| [p[0]+s, p[1]+s] }
    end
  
  end
end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
feed_bo-0.0.4	lib/feed_bo/transformable.rb
feed_bo-0.0.3	lib/feed_bo/transformable.rb
feed_bo-0.0.2	lib/feed_bo/transformable.rb
feed_bo-0.0.1	lib/feed_bo/transformable.rb