Add orx-dnk3a

orx-dnk3/src/main/kotlin/Entity.kt

@@ -0,0 +1,37 @@
+package org.openrndr.extra.dnk3
+
+import org.openrndr.color.ColorRGBa
+import org.openrndr.draw.*
+
+
+class Geometry(val vertexBuffers: List<VertexBuffer>,
+               val indexBuffer: IndexBuffer?,
+               val primitive: DrawPrimitive,
+               val offset: Int,
+               val vertexCount: Int)
+
+val DummyGeometry = Geometry(emptyList(), null, DrawPrimitive.TRIANGLES, 0, 0)
+
+sealed class Entity
+
+class MeshPrimitive(var geometry: Geometry, var material: Material)
+
+class MeshPrimitiveInstance(val primitive: MeshPrimitive, val instances: Int, val attributes: List<VertexBuffer>)
+
+abstract class MeshBase(var primitives: List<MeshPrimitive>) : Entity()
+class Mesh(primitives: List<MeshPrimitive>) : MeshBase(primitives)
+
+class InstancedMesh(primitives: List<MeshPrimitive>,
+                    var instances: Int,
+                    var attributes: List<VertexBuffer>) : MeshBase(primitives)
+
+
+class Fog : Entity() {
+    var color: ColorRGBa = ColorRGBa.WHITE
+    var end: Double = 100.0
+}
+
+abstract class Light : Entity() {
+    var color: ColorRGBa = ColorRGBa.WHITE
+}
+