Add method to set camera pose target on WebXRManager

Author: dmarcos

src/renderers/webxr/WebXRManager.js

@@ -26,12 +26,15 @@ class WebXRManager extends EventDispatcher {
 
 		let session = null;
 		let framebufferScaleFactor = 1.0;
+		var poseTarget = null;
 
 		let referenceSpace = null;
 		let referenceSpaceType = 'local-floor';
 		let customReferenceSpace = null;
 
 		let pose = null;
+		var layers = [];
+
 		let glBinding = null;
 		let glProjLayer = null;
 		let glBaseLayer = null;
@@ -72,6 +75,12 @@ class WebXRManager extends EventDispatcher {
 
 		this.isPresenting = false;
 
+		this.getCameraPose = function ( ) {
+
+			return pose;
+
+		};
+
 		this.getController = function ( index ) {
 
 			let controller = controllers[ index ];
@@ -497,6 +506,12 @@ class WebXRManager extends EventDispatcher {
 
 		}
 
+		this.setPoseTarget = function ( object ) {
+
+			if ( object !== undefined ) poseTarget = object;
+
+		};
+
 		this.updateCamera = function ( camera ) {
 
 			if ( session === null ) return;
@@ -518,8 +533,9 @@ class WebXRManager extends EventDispatcher {
 
 			}
 
-			const parent = camera.parent;
 			const cameras = cameraVR.cameras;
+			var object = poseTarget || camera;
+			const parent = object.parent;
 
 			updateCamera( cameraVR, parent );
 
@@ -532,11 +548,11 @@ class WebXRManager extends EventDispatcher {
 			cameraVR.matrixWorld.decompose( cameraVR.position, cameraVR.quaternion, cameraVR.scale );
 
 			// update user camera and its children
+			object.matrixWorld.copy( cameraVR.matrixWorld );
+			object.matrix.copy( cameraVR.matrix );
+			object.matrix.decompose( object.position, object.quaternion, object.scale );
 
-			camera.matrix.copy( cameraVR.matrix );
-			camera.matrix.decompose( camera.position, camera.quaternion, camera.scale );
-
-			const children = camera.children;
+			const children = object.children;
 
 			for ( let i = 0, l = children.length; i < l; i ++ ) {