import org.openrndr.application
import org.openrndr.draw.createEquivalent
import org.openrndr.draw.loadImage
import org.openrndr.extra.fx.dither.LumaHalftone

/**
 * Demonstrates the [LumaHalftone] effect and moste of its parameters.
 * The `invert` parameter toggles between true and false once per second.
 * The `phase0` and `phase1` parameters depend on `seconds`, which makes
 * the pattern wobble slowly.
 */
fun main() = application {
    program {
        val image = loadImage("demo-data/images/image-001.png")
        val filteredImage = image.createEquivalent()
        val lumaHalftone = LumaHalftone()
        extend {
            lumaHalftone.rotation = -15.0
            lumaHalftone.freq0 = 100.0
            lumaHalftone.gain1 = 1.0
            lumaHalftone.threshold = 0.5
            lumaHalftone.phase0 = seconds * 0.1
            lumaHalftone.phase1 = -seconds * 0.1
            lumaHalftone.apply(image, filteredImage)
            lumaHalftone.invert = seconds.mod(2.0) < 1.0
            drawer.image(filteredImage)
        }
    }
}