class Arm

# File lib/limbs/arm.rb, line 68
def calc_fingers_range
  return Config::FINGERS_RANGE / (@args - 1).to_f if @args > 1
  return Config::FINGERS_RANGE / @args.to_f if @args == 1
  return 0
end

# File lib/limbs/arm.rb, line 7
def draw
  super
  @end_x = @x0 + @limb_length

  @condition_colors = process_item_set(@params[:conditions])
  @conditions = @condition_colors.size
  @condition_colors = set_additional_colors(@conditions, @condition_colors)

  if @conditions.positive?
    draw_conditions
  else
    @draw_data << draw_line(@x0, @y0, @x0 + @limb_length, @y0, @color_limb)
  end

  @draw_data << draw_caption(@name, (@end_x - 20).round, (@y0 - 10).round, 10, :lr, @color_limb)

  @color_fingers = process_item_set(@params[:args])
  @args = @color_fingers.size
  @color_fingers = set_additional_colors(@args, @color_fingers)
  draw_fingers
end

# File lib/limbs/arm.rb, line 38
def draw_condition(i)
  @draw_data << draw_line(@x0, @y0, @x1, @y0, @color_limb)

  @draw_data << draw_ellipse(cx = (@x1 + Config::ELLIPSE_LENGTH * orientation / 2), cy = @y0,
                            rx = (Config::ELLIPSE_LENGTH / 2),
                            ry = (Config::ELLIPSE_LENGTH / 4), @condition_colors[i]) if i < @lines_num - 1

  @x0 += (@line_length + Config::ELLIPSE_LENGTH) * orientation
  @x1 = @x0 + @line_length * orientation
end

# File lib/limbs/arm.rb, line 29
def draw_conditions
  @lines_num = @conditions + 1
  @line_length = ((@limb_length.abs - @conditions * Config::ELLIPSE_LENGTH) / @lines_num).round

  @x1 = @x0 + @line_length * orientation

  @lines_num.times { |i| draw_condition(i) }
end

# File lib/limbs/arm.rb, line 49
def draw_fingers
  if @opts[:body_side] == :left
    finger_angle_start = Config::FINGER_ANGLE_START
    finger_angle_end = finger_angle_start + Config::FINGERS_RANGE
    finger_angle_step = calc_fingers_range
  else
    finger_angle_start = - Config::FINGER_ANGLE_START + Math::PI
    finger_angle_end = finger_angle_start - Config::FINGERS_RANGE
    finger_angle_step = - calc_fingers_range
  end

  @args.times do |i|
    finger_end_x, finger_end_y = circle_rotate(end_x, end_y, Config::FINGER_LENGTH,
                                               finger_angle_start + finger_angle_step * i)

    @draw_data << draw_line(end_x, end_y, finger_end_x, finger_end_y, @color_fingers[i])
  end
end