orx/orx-fx/src/jvmDemo/kotlin/DemoBlur01.kt

import org.openrndr.application
import org.openrndr.color.ColorRGBa
import org.openrndr.draw.*
import org.openrndr.extra.fx.blur.*
import org.openrndr.math.Polar
import kotlin.math.sin

fun main() = application {
    program {
        // In this buffer we will draw some simple shapes
        val dry = renderTarget(width / 3, height / 3) {
            colorBuffer()
        }

        // The list of effects to demo
        val effects = listOf(
            BoxBlur(),
            ApproximateGaussianBlur(),
            HashBlur(),
            GaussianBlur(),
            GaussianBloom(),
            FrameBlur(),
            ZoomBlur(),
            LaserBlur()
        )

        // On this buffer we will draw the dry buffer with an effect applied
        val wet = colorBuffer(dry.width, dry.height)

        val font = loadFont("demo-data/fonts/IBMPlexMono-Regular.ttf", 16.0)

        extend {
            // Draw two moving circles
            drawer.isolatedWithTarget(dry) {
                clear(ColorRGBa.BLACK)

                fill = null
                stroke = ColorRGBa.PINK
                strokeWeight = 25.0
                circle(
                    bounds.center +
                            Polar(seconds * 50.0, 100.0).cartesian,
                    200.0 + 50.0 * sin(seconds * 2.0)
                )

                fill = ColorRGBa.PINK
                stroke = null
                circle(
                    bounds.center +
                            Polar(seconds * 50.0 + 60, 100.0).cartesian,
                    100.0 + 20.0 * sin(seconds * 2.0 + 1)
                )
            }

            effects.forEachIndexed { i, blur ->
                // Adjust the effect settings.
                // All the values could be animated.
                when (blur) {
                    is BoxBlur -> {
                        blur.window = 30
                    }

                    is ApproximateGaussianBlur -> {
                        blur.window = 25
                        blur.sigma = 15.0
                    }

                    is HashBlur -> {
                        blur.samples = 50
                        blur.radius = 5.0
                        blur.time = seconds
                    }

                    is GaussianBlur -> {
                        blur.window = 25
                        blur.sigma = 15.0
                    }

                    is GaussianBloom -> {
                        blur.window = 5
                        blur.sigma = 3.0
                        blur.gain = 3.0
                        blur.noiseSeed = seconds
                    }

                    is FrameBlur -> {
                        blur.blend = 0.05
                    }

                    is ZoomBlur -> {
                        blur.center = Polar(seconds * 77.0, 0.5)
                            .cartesian
                        blur.strength = 0.8
                    }

                    is LaserBlur -> {
                        blur.center = Polar(seconds * 77.0, 0.5)
                            .cartesian
                        blur.aberration = 0.03
                        blur.radius = 0.5

                    }
                }

                // Apply the effect on `dry` writing the result to `wet`
                blur.apply(dry.colorBuffer(0), wet)

                // Draw `wet` and write the effect name on top
                drawer.isolated {
                    translate(
                        (i % 3) * width / 3.0,
                        (i / 3) * height / 3.0
                    )
                    image(wet)
                    fontMap = font
                    text(blur.javaClass.simpleName, 20.0, 30.0)
                }
            }
        }
    }
}