Update Object3D.js

src/core/Object3D.js

@@ -6,6 +6,8 @@
 import { Layers } from './Layers.js';
 import { Matrix3 } from '../math/Matrix3.js';
 import { generateUUID } from '../math/MathUtils.js';
+import { BufferAttribute } from './BufferAttribute.js';
+import { BufferGeometry} from './BufferGeometry.js';
 
 let _object3DId = 0;
 
@@ -962,13 +964,44 @@
 
 	}
 
+
 	clone( recursive ) {
 
 		return new this.constructor().copy( this, recursive );
 
 	}
 
 	copy( source, recursive = true ) {
+
+
+		if( recursivie ){
+
+			//  Copy VALUES, not just references to the source Attribute array
+			//  This fixes e.g. 'cumulative rotations' etc, for clones which would
+			//  apply transformations to their predecessors, otherwise
+
+			let originalGeometry = source.geometry;
+			let newGeometry = new BufferGeometry();
+
+			// create new containers for attributes
+			Object.keys(originalGeometry.attributes).forEach((key, idx) => {
+
+				// get, use the correct 'typed array', dimension it
+				var arrayType = (''+originalGeometry.attributes[key].array.constructor).split(' ')[1].split('(')[0];
+				newGeometry.attributes[key] = new BufferAttribute(new window[arrayType](
+					originalGeometry.attributes[key].array.length),
+					originalGeometry.attributes[key].itemSize,
+					originalGeometry.attributes[key].normalized )
+
+				// ...and copy values into them
+				originalGeometry.attributes[key].array.forEach((v, i) => {
+					newGeometry.attributes[key].array[i] = originalGeometry.attributes[key].array[i];
+				});
+			})
+
+			this.source.geometry = newGeometry;
+		}
+
 
 		this.name = source.name;