lighttroupe/luz-next

class ActorEffectThemeScrubChildren < ActorEffect
    title                "Theme Scrub Children"
    description "Smoothly blends chosen theme onto children with chosen offset."

    categories :color, :child_consumer

    setting 'theme', :theme
    setting 'amount', :float, :range => 0.0..1.0, :default => 1.0..1.0
    setting 'offset', :float, :range => -1000..1000, :default => 0..1

    def render
        return yield if (theme.nil? or theme.empty? or amount == 0.0)

        index, scrub = (child_index + offset).divmod(1.0)
        style_a, style_b = theme.style(index), theme.style(index+1)
        style_a.using_amount(amount) {
            style_b.using_amount(scrub * amount) {
                yield
            }
        }
    end
end