rm.java

private double fBoxCheap(Vec3 p, Vec3 b) {
	return Vec3.minus(p.abs(), b).max();
}

private double map(Vec3 p) {

	double theta = elapsedTime * 0.001;

	Vec2 yz = new Vec2(0.0, 0.0);
	yz.x = (p.y * Math.cos(theta)) - (p.z * Math.sin(theta));
	yz.y = (p.z * Math.cos(theta)) + (p.y * Math.sin(theta));
	p.y = yz.x;
	p.z = yz.y;

	Vec2 xy = new Vec2(0.0, 0.0);
	xy.x = (p.x * Math.cos(theta)) - (p.y * Math.sin(theta));
	xy.y = (p.y * Math.cos(theta)) + (p.x * Math.sin(theta));
	p.x = xy.x;
	p.y = xy.y;

	final double sz1 = 0.5;
	final double sz2 = sz1 - 0.1;
	final double sz3 = sz1 * 2.0;

	final double a = fBoxCheap(p, new Vec3(sz1, sz1, sz1));
	final double b = fBoxCheap(p, new Vec3(sz3, sz2, sz2));
	final double c = fBoxCheap(p, new Vec3(sz2, sz3, sz2));
	final double d = fBoxCheap(p, new Vec3(sz2, sz2, sz3));

	return Math.max(Math.max(Math.max(a, -b), -c), -d);
}