GeometryEditor: Implemented @jbaicoianu's array creation at access time approach.

src/core/GeometryEditor.js

@@ -2,21 +2,74 @@
  * @author mrdoob / http://mrdoob.com/
  */
 
-THREE.GeometryEditor = function ( bufferGeometry ) {
+THREE.GeometryEditor = function ( geometry ) {
 
-	this.vertices = [];
-	this.normals = [];
-	this.uvs = [];
+	this.geometry = geometry;
 
-	var attributes = bufferGeometry.attributes;
+};
+
+Object.defineProperties( THREE.GeometryEditor.prototype, {
+	vertices: { 
+		enumerable: true,
+		get: function() { return this.createVertexProxies(); }
+	},
+	normals: {
+		enumerable: true,
+		get: function() { return this.createNormalProxies(); } 
+	},
+	uvs: {
+		enumerable: true,
+		get: function() { return this.createUVProxies(); } 
+	}
+} );
+
+THREE.GeometryEditor.prototype.createVertexProxies = function () {
+
+	Object.defineProperty( this, 'vertices', { value: [], writable: true } );
+
+	var attributes = this.geometry.attributes;
 	var length = attributes.position.array.length / 3;
 
 	for ( var i = 0; i < length; i ++ ) {
 
 		this.vertices.push( new THREE.ProxyVector3( attributes.position.array, i * 3 ) );
+
+	}
+
+	return this.vertices;
+
+};
+
+THREE.GeometryEditor.prototype.createNormalProxies = function () {
+
+	Object.defineProperty( this, 'normals', { value: [], writable: true } );
+
+	var attributes = this.geometry.attributes;
+	var length = attributes.position.array.length / 3;
+
+	for ( var i = 0; i < length; i ++ ) {
+
 		this.normals.push( new THREE.ProxyVector3( attributes.normal.array, i * 3 ) );
+
+	}
+
+	return this.normals;
+
+};
+
+THREE.GeometryEditor.prototype.createUVProxies = function () {
+
+	Object.defineProperty( this, 'uvs', { value: [], writable: true } );
+
+	var attributes = this.geometry.attributes;
+	var length = attributes.position.array.length / 3;
+
+	for ( var i = 0; i < length; i ++ ) {
+
 		this.uvs.push( new THREE.ProxyVector2( attributes.uv.array, i * 2 ) );
 
 	}
 
+	return this.uvs;
+
 };