Class: RedBird::Animation::BackAndForth

Inherits:
Base
  • Object
show all
Defined in:
lib/red_bird/animation.rb

Overview

This animation starts in the first frame and goes through every frame until the last; then, it moves backward through every frame and starts again.

Author:

  • Frederico Linhares

Instance Attribute Summary

Attributes inherited from Base

#current_sprite

Instance Method Summary collapse

Methods inherited from Base

#initialize, #reset

Constructor Details

This class inherits a constructor from RedBird::Animation::Base

Instance Method Details

#animate ⇒ Object

This method must be called for every tick. It changes the current displayed sprite.



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# File 'lib/red_bird/animation.rb', line 96

def animate
  case @direction
  when :forward
    @current_time += 1
    if @current_time > @frames[@current_frame].duration then
      @current_time -= @frames[@current_frame].duration
      @current_frame += 1
      if @current_frame >= @frames.size then
        @direction = :backward
        @current_frame = @frames.size - 2
      end
      @current_sprite = @frames[@current_frame].sprite
    end
  when :backward
    @current_time += 1
    if @current_time > @frames[@current_frame].duration then
      @current_time -= @frames[@current_frame].duration
      @current_frame -= 1
      if @current_frame < 0 then
        @direction = :forward
        @current_frame = 1
      end
      @current_sprite = @frames[@current_frame].sprite
    end
  end
end