ruby-processingでProcessing->Examples->Basic->TransFormの写経

　写経してみたｗ；

case :TriangleFlower
when :TriangleFlower
  class Point
    attr_accessor :x,:y
    
    def initialize x,y
      @x,@y = x,y
    end
  end
  
  def setup
    @shift = 1.0
    @fade = 0
    @fill_col = 0
    @rot = 0
    @spin = 0
    
    size 200,200
    background 0
    smooth
    
    @p = Array.new
    
    @fade = 255.0/(width/2.0/@shift)
    @spin = 360.0/(width/2.0/@shift)

    @p << Point.new(-width/2, height/2)
    @p << Point.new(width/2, height/2)
    @p << Point.new(0, -height/2)
    
    no_stroke
    translate width/2,height/2
    tri_blur
    
    no_loop
  end
  
  def draw
  end
  
  def tri_blur
    fill @fill_col
    @fill_col += @fade
    rotate @spin
    
    triangle @p[0].x+=@shift,@p[0].y-=@shift/2,
    @p[1].x-=@shift,@p[1].y-=@shift/2,
    @p[2].x,@p[2].y+=@shift
    
    tri_blur if @p[0].x <0
  end
  
when :Translate
  def setup
    @x = 0
    @size = 40.0
    
    size 200,200
    no_stroke
    frame_rate 30
  end
  
  def draw
    background 102
    
    @x += 0.8
    
    @x = -@size if @x > (width+@size)
    
    translate @x,height/2-@size/2
    fill 255
    rect -@size/2,-@size/2,@size,@size
    
    translate @x,@size
    fill 0
    rect -@size/2,-@size/2,@size,@size
  end
when :Scale
  def setup
    size 200,200
    no_stroke
    rect_mode CENTER
    frame_rate 30
    
    @a = @s = 0.0
  end
  
  def draw
    background 102
    
    @a += 0.04
    @s = cos(@a) * 2
    
    translate width/2, height/2
    scale @s#width/2,height/2を中心にスケール、0で中心に潰れて、マイナスの時反転
    fill 51
    rect 0,0,50,50
    
    translate 75,0
    fill 255
    scale @s
    rect 0,0,50,50
  end
when :Rotate
  def setup
    size 200,200
    no_stroke
    fill 255
    frame_rate 30
    
    @angle = 0
    @jitter = 0
  end
  
  def draw
    background 102
    @jitter = random(-0.1,0.1) if (second % 2) == 0

    @angle += @jitter

    translate width/2, height/2
    rotate(cos(@angle))
    rect_mode CENTER
    rect 0,0,115,115
    
  end
when :Arm
  def setup
    @x,@y = 50,100
    @angle1 = @angle2 = 0.0
    @seg_length = 50
    
    size 200,200
    smooth
    stroke_weight 20.0
    stroke 0,100
  end
  
  def draw
    background 226
    @angle1 = (mouse_x/width.to_f - 0.5) * -PI
    @angle2 = (mouse_y/height.to_f - 0.5) * PI
    
    push_matrix
    segment @x,@y,@angle1
    segment @seg_length,0,@angle2
    pop_matrix
  end
  
  def segment x,y,a
    translate x,y
    rotate a
    line 0,0, @seg_length,0
  end
end

　TriangleFlowerがruby-processingとProcessingで一寸形が違っているｗ；