AF Manager class for dynamic animation frame request/cancel

src/core/renderer/utilities/AFManager.js

@@ -0,0 +1,43 @@
+class AFManager {
+
+	constructor() {
+
+		// XR session
+		this.xrsession = null;
+
+	}
+
+	// Set active XR session
+	setXRSession( xrsession ) {
+
+		this.xrsession = xrsession;
+
+	}
+
+	removeXRSession() {
+
+		this.xrsession = null;
+
+	}
+
+	// Request animation frame (defer to XR session if present)
+	requestAnimationFrame( cb ) {
+
+		if ( ! this.xrsession ) return window.requestAnimationFrame( cb );
+
+		return this.xrsession.requestAnimationFrame( cb );
+
+	};
+
+	// Cancel animation frame via handle (defer to XR session if present)
+	cancelAnimationFrame( handle ) {
+
+		if ( ! this.xrsession ) window.cancelAnimationFrame( handle );
+
+		else this.xrsession.cancelAnimationFrame( handle );
+
+	}
+
+}
+
+export { AFManager };