lighttroupe/luz

class ActorEffectColorScrubChildren < ActorEffect
    title                "Color Scrub Children"
    description ""

    categories :color, :child_consumer

    setting 'color', :color
    setting 'progress', :float, :range => -1.0..2.0, :default => 0.0..1.0
    setting 'amount', :float,  :range => 0.0..1.0, :default => 1.0..1.0
    setting 'spread', :float, :range => 0.0..1.0, :default => 0.5..1.0

    def render
        child_progress = ((child_number-1).to_f / (total_children-1).to_f)
        delta = (child_progress - progress).abs
        # the bigger the delta, the less color application will occur
        # delta is 0.0..1.0
        delta /= (spread * 2.0)
        fade_amount = (amount - delta).clamp(0.0, 1.0)
        with_color(current_color.fade_to(fade_amount, color)) {
            yield
        }
    end
end