Add DemoSimplex01.kt

orx-noise/src/demo/kotlin/DemoSimplex01.kt

@@ -0,0 +1,40 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.draw.LineJoin
+import org.openrndr.extensions.SingleScreenshot
+import org.openrndr.extra.noise.simplex
+import org.openrndr.shape.contour
+
+fun main() = application {
+    configure {
+        width = 720
+        height = 720
+    }
+    program {
+        if (System.getProperty("takeScreenshot") == "true") {
+            extend(SingleScreenshot()) {
+                this.outputFile = System.getProperty("screenshotPath")
+            }
+        }
+        extend {
+            drawer.stroke = null
+            drawer.fill = ColorRGBa.PINK
+            drawer.lineJoin = LineJoin.ROUND
+            for (y in 0..height step 20) {
+                val c = contour {
+                    moveTo(0.0, 0.0)
+                    for (x in 0..width step 40) {
+                        val cx = simplex(y, x * 0.1 + seconds) * 10.0 + x
+                        val cy = simplex(y + 3000, x * 0.1 + seconds) * 20.0
+                        val px = simplex(y + 8000, x * 0.1 + seconds) * 10.0 + x
+                        val py = simplex(y + 6000, x * 0.1 + seconds) * 20.0
+                        continueTo(cx, cy, px, py)
+                    }
+                }
+                val points = c.equidistantPositions(50)
+                drawer.circles(points, 10.0)
+                drawer.translate(0.0, 20.0)
+            }
+        }
+    }
+}