diff --git a/threejs/three-orthographictrackballcontrols.d.ts b/threejs/three-orthographictrackballcontrols.d.ts
new file mode 100644
index 000000000..ff40a132a
--- /dev/null
+++ b/threejs/three-orthographictrackballcontrols.d.ts
@@ -0,0 +1,49 @@
+// Type definitions for three.js (OrthographicTrackballControls.js)
+// Project: https://github.com/mrdoob/three.js/blob/master/examples/js/controls/OrthographicTrackballControls.js
+// Definitions by: Stefan Profanter <https://github.com/pro>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="./three.d.ts" />
+
+declare module THREE {
+	class OrthographicTrackballControls extends EventDispatcher {
+		constructor(object:Camera, domElement?:HTMLElement);
+
+		object:Camera;
+		domElement:HTMLElement;
+
+		// API
+		enabled:boolean;
+		screen:{ left: number; top: number; width: number; height: number };
+		radius:number;
+		rotateSpeed:number;
+		zoomSpeed:number;
+		panSpeed:number;
+		noRotate:boolean;
+		noZoom:boolean;
+		noPan:boolean;
+		noRoll:boolean;
+		staticMoving:boolean;
+		dynamicDampingFactor:number;
+		keys:number[];
+
+		position0: THREE.Vector3;
+		target0: THREE.Vector3;
+		up0: THREE.Vector3;
+
+		left0: number;
+		right0: number;
+		top0: number;
+		bottom0: number;
+
+		update():void;
+		reset():void;
+		checkDistances():void;
+		zoomCamera():void;
+		panCamera():void;
+		rotateCamera():void;
+
+		handleResize():void;
+		handleEvent(event: any):void;
+	}
+}