Add skinning support to orx-dnk3a

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

@@ -2,24 +2,47 @@ package org.openrndr.extra.dnk3
 
 import org.openrndr.color.ColorRGBa
 import org.openrndr.draw.*
+import org.openrndr.math.Matrix44
 
 
 class Geometry(val vertexBuffers: List<VertexBuffer>,
                val indexBuffer: IndexBuffer?,
                val primitive: DrawPrimitive,
                val offset: Int,
-               val vertexCount: Int)
+               val vertexCount: Int) {
+
+    override fun toString(): String {
+        return "Geometry(vertexBuffers: $vertexBuffers, indexBuffers: $indexBuffer, primitive: $primitive, offset: $offset, vertexCount: $vertexCount)"
+    }
+
+}
 
 val DummyGeometry = Geometry(emptyList(), null, DrawPrimitive.TRIANGLES, 0, 0)
 
 sealed class Entity
 
-class MeshPrimitive(var geometry: Geometry, var material: Material)
+class MeshPrimitive(var geometry: Geometry, var material: Material) {
+
+    override fun toString(): String {
+        return "MeshPrimitive(geometry: $geometry, 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 Mesh(primitives: List<MeshPrimitive>) : MeshBase(primitives) {
+    override fun toString(): String {
+        return "Mesh(primitives: $primitives)"
+    }
+}
+
+class SkinnedMesh(primitives: List<MeshPrimitive>,
+                  val joints: List<SceneNode>,
+                  val skeleton: SceneNode,
+                  val inverseBindMatrices: List<Matrix44>
+) : MeshBase(primitives)
 
 class InstancedMesh(primitives: List<MeshPrimitive>,
                     var instances: Int,