lighttroupe/luz

class ActorEffectImageSpriteSelect < ActorEffect
    title                "Image Sprite Select"
    description "Apply one frame of animation from a 'sprite', selected by forwards and backwards events."

    categories :color

    hint "Supports images containing multiple frames, spaced equally, either horizontally or vertically."

    setting 'image', :image, :summary => true
    setting 'number', :integer, :range => 1..256, :default => 1..2

    setting 'forwards', :event
    setting 'backwards', :event

    def render
        image.using {
            # wide images are animated horizontally, tall ones vertically
            if image.width > image.height
                with_texture_scale_and_translate(1.0 / number, 1, (forwards.count - backwards.count) % number, 0) {
                    yield
                }
            else
                with_texture_scale_and_translate(1, 1.0 / number, 0, (forwards.count - backwards.count) % number) {
                    yield
                }
            end
        }
    end
end