lighttroupe/luz

class ActorEffectScanLinesHorizontal < ActorEffect
    title                "Scan Lines Horizontal"
    description "Creates horizontal scanlines in images, with optional fading and horizontal translation."

    categories :color

    setting 'size', :float, :range => 0.0..1.0, :default => 0.05..1.0, :shader => true
    setting 'fade_one', :float, :range => 0.0..1.0, :default => 0.0..1.0, :shader => true
    setting 'offset_one', :float, :range => -1.0..1.0, :default => 0.0..1.0, :shader => true
    setting 'fade_two', :float, :range => 0.0..1.0, :default => 0.5..1.0, :shader => true
    setting 'offset_two', :float, :range => -1.0..1.0, :default => 0.0..1.0, :shader => true

    CODE = "
        if (mod(pixel_xyzw.y, size) >= (size / 2.0)) {
            texture_st.s -= (offset_one);
            output_rgba.a *= (1.0-fade_one);
        } else {
            texture_st.s -= (offset_two);
            output_rgba.a *= (1.0-fade_two);
        }
    "

    def render
        with_fragment_shader_snippet(CODE, self) {
            yield
        }
    end
end