Added orx-compositor

orx-compositor/README.md

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+# orx-compositor
+
+A simple toolkit to make composite images.
+
+##### Usage
+
+```kotlin
+import org.openrndr.Configuration
+import org.openrndr.Program
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.extra.compositor.*
+import org.openrndr.filter.blend.add
+import org.openrndr.filter.blur.ApproximateGaussianBlur
+
+class Compositor001 : Program() {
+
+    override fun setup() {
+        val drawing = compose {
+            draw {
+                drawer.fill = ColorRGBa.PINK
+                drawer.circle(width / 2.0, height / 2.0, 10.0)
+            }
+
+            layer {
+                draw {
+                    drawer.circle(width / 2.0, height / 2.0, 100.0)
+                }
+                post(ApproximateGaussianBlur()) {
+                    window = 10
+                    sigma = Math.cos(seconds * 10.0) * 10.0 + 10.0
+                }
+                blend(add)
+            }
+        }
+
+        extend {
+            drawing.draw(drawer)
+        }
+    }
+}
+
+fun main(args: Array<String>) = application(Compositor001(), Configuration())
+```