private void renderBound() {
		noFill();
		stroke(210, 10, 30);
		strokeWeight(1);
		box(2 * lmt[0], 2 * lmt[1], 2 * lmt[2]);

		boolean ucs = false;
		if (ucs) {
			int t = 205;
			strokeWeight(1);
			stroke(0, 100, 80, t);
			line(0, 0, 0, height / 18, 0, 0); // x
			stroke(120, 100, 80, t);
			line(0, 0, 0, 0, height / 18, 0); // y
			stroke(240, 100, 80, t);
			line(0, 0, 0, 0, 0, height / 18); // z
		}
	}