[orx-obj-loader] Add support for wireframes and non-planar and concave faces

orx-obj-loader/src/main/kotlin/MeshData.kt

@@ -0,0 +1,18 @@
+package org.openrndr.extra.objloader
+
+@JvmRecord
+data class MeshData(val vertexData: VertexData, val polygonGroups: Map<String, List<IndexedPolygon>>) {
+    fun triangulate(): MeshData {
+        return copy(polygonGroups = polygonGroups.mapValues {
+            it.value.flatMap { polygon -> polygon.triangulate(vertexData) }
+        })
+    }
+
+    fun flattenPolygons(): Map<String, List<Polygon>> {
+        return polygonGroups.mapValues {
+            it.value.map { ip ->
+                ip.toPolygon(vertexData)
+            }
+        }
+    }
+}