[openrndr-demos] Add DemoCompositionDrawer01

openrndr-demos/src/demo/kotlin/DemoCompositionDrawer01.kt

@@ -0,0 +1,37 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.math.Vector2
+import org.openrndr.shape.CompositionDrawer
+import org.openrndr.svg.writeSVG
+
+fun main() {
+    application {
+        program {
+
+            extend {
+
+                drawer.clear(ColorRGBa.WHITE)
+
+                val cd = CompositionDrawer()
+                val layer = cd.group {
+                    fill = ColorRGBa.PINK
+                    stroke = ColorRGBa.BLACK
+                    strokeWeight = 10.0
+                    circle(Vector2(width/2.0, height/2.0), 100.0)
+                    circle(Vector2(200.0, 200.0), 50.0)
+                }
+                // demonstrating how to set custom attributes on the CompositionNode
+                // these are stored in SVG
+                layer.id = "Layer_2"
+                layer.attributes["openrndr:custom"] = "5"
+
+                // draw the composition to the screen
+                drawer.composition(cd.composition)
+
+                // print the svg to the console
+                println(writeSVG(cd.composition))
+
+            }
+        }
+    }
+}