package noise

import org.openrndr.application
import org.openrndr.draw.loadImage
import org.openrndr.extra.camera.Camera2D
import org.openrndr.extra.imageFit.imageFit
import org.openrndr.extra.shaderphrases.noise.simplex13
import org.openrndr.extra.shadestyles.fills.noise.noise

/**
 * Demonstrates the use of the `blueNois` variant of the `noise` shade style
 * to render an image as black and white with a pointillist luma-based effect.
 *
 * More computationally heavy than other shade styles.
 */
fun main() {
    application {
        configure {
            width = 720
            height = 720
        }
        program {
            val image = loadImage("demo-data/images/image-001.png")
            extend(Camera2D())
            extend {
                drawer.shadeStyle = noise {
                    phase = seconds * 10.0

                    filterWindow = 5
                    domainWarpFunction = """$simplex13
                        vec3 domainWarp(vec3 p) { 
                            float px = simplex13(p * 0.01); 
                            float py = simplex13(p.yxz * -0.01); 
                            return p + 10.25 * vec3(px, py, 0.0); 
                        }
                    """.trimIndent()

                    blueNoise {
                        bits = 17
                        bilinear()
                    }

                    blendFunction = """
                        |vec4 blend(vec4 o, float n) { 
                        |    float luma = dot(o.rgb, vec3(1.0 / 3.0));
                        |    return vec4(vec3(smoothstep(luma + 0.01, luma - 0.01, n)), 1.0);
                        |}""".trimMargin()

                }
                drawer.imageFit(image, drawer.bounds)
            }
        }
    }
}