Adds new logic to restore camera fov and zoom in WebXRManager

WebGLRender has been restored, now it is not involved at all.

src/renderers/WebGLRenderer.js

@@ -1151,16 +1151,6 @@ class WebGLRenderer {
 
 			if ( scene.matrixWorldAutoUpdate === true ) scene.updateMatrixWorld();
 
-			// Restore original camera fov
-
-			if ( xr.enabled === true && xr.isPresenting === false && camera.userData.previousFov !== undefined ) {
-
-				camera.fov = camera.userData.previousFov;
-				delete camera.userData.previousFov;
-				camera.updateProjectionMatrix();
-
-			}
-
 			// update camera matrices and frustum
 
 			if ( camera.parent === null && camera.matrixWorldAutoUpdate === true ) camera.updateMatrixWorld();

src/renderers/webxr/WebXRManager.js

@@ -65,6 +65,8 @@ class WebXRManager extends EventDispatcher {
 
 		//
 
+		let updatedCameraProperties = null;
+
 		this.cameraAutoUpdate = true;
 		this.enabled = false;
 
@@ -182,6 +184,17 @@ class WebXRManager extends EventDispatcher {
 
 			scope.isPresenting = false;
 
+			if ( updatedCameraProperties !== null ) {
+
+				const camera = updatedCameraProperties.camera;
+				camera.fov = updatedCameraProperties.fov;
+				camera.zoom = updatedCameraProperties.zoom;
+				camera.updateProjectionMatrix();
+
+				updatedCameraProperties = null;
+
+			}
+
 			renderer.setPixelRatio( currentPixelRatio );
 			renderer.setSize( currentSize.width, currentSize.height, false );
 
@@ -363,6 +376,8 @@ class WebXRManager extends EventDispatcher {
 
 				scope.isPresenting = true;
 
+				updatedCameraProperties = null;
+
 				scope.dispatchEvent( { type: 'sessionstart' } );
 
 			}
@@ -633,9 +648,13 @@ class WebXRManager extends EventDispatcher {
 
 			if ( camera.isPerspectiveCamera ) {
 
-				if ( camera.userData.previousFov === undefined ) {
+				if ( updatedCameraProperties === null ) {
 
-					camera.userData.previousFov = camera.fov;
+					updatedCameraProperties = {
+						camera: camera,
+						fov: camera.fov,
+						zoom: camera.zoom,
+					};
 
 				}