DragControls: Add recursive property. (mrdoob#26747)

* add recursive property to DragControls

* Update DragControls.js

Clean up.

---------

Co-authored-by: Michael Herzog <[email protected]>

Author: ssk4988

docs/examples/en/controls/DragControls.html

@@ -100,6 +100,11 @@ <h3>[property:Boolean enabled]</h3>
 			Whether or not the controls are enabled.
 		</p>
 
+		<h3>[property:Boolean recursive]</h3>
+		<p>
+			Whether children of draggable objects can be dragged independently from their parent. Default is `true`.
+		</p>
+
 		<h3>[property:Boolean transformGroup]</h3>
 		<p>
 			This option only works if the [page:DragControls.objects] array contains a single draggable group object.

examples/jsm/controls/DragControls.js

@@ -99,7 +99,7 @@ class DragControls extends EventDispatcher {
 				_intersections.length = 0;
 
 				_raycaster.setFromCamera( _pointer, _camera );
-				_raycaster.intersectObjects( _objects, true, _intersections );
+				_raycaster.intersectObjects( _objects, scope.recursive, _intersections );
 
 				if ( _intersections.length > 0 ) {
 
@@ -151,7 +151,7 @@ class DragControls extends EventDispatcher {
 			_intersections.length = 0;
 
 			_raycaster.setFromCamera( _pointer, _camera );
-			_raycaster.intersectObjects( _objects, true, _intersections );
+			_raycaster.intersectObjects( _objects, scope.recursive, _intersections );
 
 			if ( _intersections.length > 0 ) {
 
@@ -205,6 +205,7 @@ class DragControls extends EventDispatcher {
 		// API
 
 		this.enabled = true;
+		this.recursive = true;
 		this.transformGroup = false;
 
 		this.activate = activate;