Function touchend

src/ui/viewer/lightgl.js:1515–1525

(e)

		}

		function touchend(e) {
			// Shrink the event handlers back to the canvas when dragging ends.
			off(document, 'touchmove', touchmove);
			off(document, 'touchend', touchend);
			on(gl.canvas, 'touchmove', touchmove);
			on(gl.canvas, 'touchend', touchend);
			gl = context;
			e = augmentTouchEvent(e);
			if(gl.ontouchend) gl.ontouchend(e);
			e.preventDefault();
		}

		function reset() {
			hasOld = false;