very simple camera movement.

js/pixl/public/trixl.html

		trixl.start();
		document.addEventListener("keydown", function(ev) {
			if (ev.keyCode == 32) {
			switch (ev.keyCode) {
			case 32:
				if (trixl.step.reqId == null) {
					trixl.start();
				} else {
					trixl.stop();
				}
				break;
			case 37: // left
				trixl.pos.x -= 0.1;
				break;
			case 38: // up
				trixl.pos.z -= 0.1;
				break;
			case 39: // right
				trixl.pos.x += 0.1;
				break;
			case 40: // down
				trixl.pos.z += 0.1;
				break;
			}
		});