Add orx-view-box, adjust for api changes in OPENRNDR

orx-view-box/src/demo/kotlin/DemoViewBox01.kt

@@ -0,0 +1,58 @@
+
+import org.openrndr.application
+import org.openrndr.draw.DrawPrimitive
+import org.openrndr.extensions.Screenshots
+import org.openrndr.extra.camera.Camera2D
+import org.openrndr.extra.camera.Orbital
+import org.openrndr.extra.fx.Post
+import org.openrndr.extra.fx.blur.ApproximateGaussianBlur
+import org.openrndr.extra.meshgenerators.boxMesh
+import org.openrndr.extra.viewbox.viewBox
+import org.openrndr.shape.Rectangle
+
+fun main() {
+    application {
+        configure {
+            width = 800
+            height = 800
+        }
+        program {
+            val vbx = viewBox(Rectangle(0.0, 0.0, 200.0, 800.0)) {
+                extend(Screenshots())
+                extend(Camera2D())
+                extend {
+                    drawer.rectangle(20.0, 20.0, 100.0, 100.0)
+                }
+            }
+
+            val vbx2 = viewBox(Rectangle(200.0, 0.0, 200.0, 800.0)) {
+                extend(Post()) {
+                    val blur = ApproximateGaussianBlur()
+                    blur.sigma = 10.0
+                    blur.window = 25
+                    post { i, o ->
+                        blur.apply(i, o)
+                    }
+                }
+                extend(Camera2D())
+                extend {
+                    drawer.rectangle(20.0, 20.0, 100.0, 100.0)
+                }
+            }
+
+            val vbx3d = viewBox(Rectangle(400.0, 0.0, 400.0, 800.0)) {
+                extend(Orbital())
+                val cube = boxMesh()
+                extend {
+                    drawer.vertexBuffer(cube, DrawPrimitive.TRIANGLES)
+                }
+            }
+
+            extend {
+                vbx.draw()
+                vbx2.draw()
+                vbx3d.draw()
+            }
+        }
+    }
+}