Fixes and move to jvmDemo (#286)

orx-jumpflood/src/jvmDemo/kotlin/DemoVoronoi02.kt

@@ -0,0 +1,55 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.draw.*
+import org.openrndr.extra.jumpfill.*
+import kotlin.math.cos
+
+fun main() = application {
+    configure {
+        width = 512
+        height = 512
+    }
+    program {
+        val rt = renderTarget(512, 512, 1.0) {
+            colorBuffer(type = ColorType.FLOAT32)
+        }
+
+        val flowfield = colorBuffer(512, 512, type = ColorType.FLOAT32)
+        val cluster = ClusteredField(decodeMode = DecodeMode.DISTANCE, outputDistanceToContours = true)
+
+
+        cluster.normalizedDistance = true
+
+        extend {
+            fun plot(x: Double, y: Double, id: Double) {
+                drawer.fill = ColorRGBa(id, 0.0, 0.0, 1.0)
+                drawer.point(x, y)
+            }
+
+            drawer.isolatedWithTarget(rt) {
+                drawer.clear(ColorRGBa(-1.0, -1.0, -1.0, 0.0))
+                val o = cos(seconds) * 200.0 + 200.0
+
+                for (i in 0 until 20) {
+                    plot(o + 100.0 + i * 4, 100.0, 0.25)
+                }
+
+                for (i in 0 until 20) {
+                    plot(200.0 + i * 4, 150.0 + i, 0.5)
+                }
+                for (i in 0 until 20) {
+                    plot(300.0 + i * 4, 250.0 + i, 0.7)
+                }
+
+                for (i in 0 until 20) {
+                    plot(400.0 + i * 4, 250.0 + i, 0.75)
+                }
+            }
+            cluster.apply(rt.colorBuffer(0), flowfield)
+            drawer.drawStyle.colorMatrix = tint(ColorRGBa(10.0, 10.0, 1.0))
+            drawer.image(flowfield)
+
+
+        }
+    }
+}