From 8914853ba04d252c1763f0207c529d0c9a26c43a Mon Sep 17 00:00:00 2001
From: "Mr.doob" <info@mrdoob.com>
Date: Fri, 25 May 2018 17:18:58 -0400
Subject: [PATCH] WebXRManager: Expose frameOfReferenceType.

---
 examples/js/vr/WebVR.js             | 7 +++++--
 src/renderers/webvr/WebXRManager.js | 4 ++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/examples/js/vr/WebVR.js b/examples/js/vr/WebVR.js
index db6fc9fe6b..95d020cb0f 100644
--- a/examples/js/vr/WebVR.js
+++ b/examples/js/vr/WebVR.js
@@ -7,7 +7,7 @@
 
 var WEBVR = {
 
-	createButton: function ( renderer ) {
+	createButton: function ( renderer, options ) {
 
 		function showEnterVR( device ) {
 
@@ -38,9 +38,12 @@ var WEBVR = {
 
 			function onSessionStarted( session ) {
 
+				if ( options === undefined ) options = {};
+				if ( options.frameOfReferenceType === undefined ) options.frameOfReferenceType = 'stage';
+
 				session.addEventListener( 'end', onSessionEnded );
 
-				renderer.vr.setSession( session );
+				renderer.vr.setSession( session, options );
 				button.textContent = 'EXIT XR';
 
 				currentSession = session;
diff --git a/src/renderers/webvr/WebXRManager.js b/src/renderers/webvr/WebXRManager.js
index aaf971bebe..048495d6b6 100644
--- a/src/renderers/webvr/WebXRManager.js
+++ b/src/renderers/webvr/WebXRManager.js
@@ -58,7 +58,7 @@ function WebXRManager( renderer ) {
 
 	//
 
-	this.setSession = function ( value ) {
+	this.setSession = function ( value, options ) {
 
 		session = value;
 
@@ -72,7 +72,7 @@ function WebXRManager( renderer ) {
 			} );
 
 			session.baseLayer = new XRWebGLLayer( session, gl );
-			session.requestFrameOfReference( 'stage' ).then( function ( value ) {
+			session.requestFrameOfReference( options.frameOfReferenceType ).then( function ( value ) {
 
 				frameOfRef = value;
 
-- 
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