// Ifdef this out because it isn't used, and it makes it hard
// to maintain aab without allowing the aab to grow out of bounds.
#if setbounds
//-----------------------------------------------------------------------
protected void SetBounds(AxisAlignedBox aabb)
{
aab = (AxisAlignedBox)aabb.Clone();
float sqDist = (float)Math.Max(aab.Minimum.LengthSquared,
aab.Maximum.LengthSquared);
boundingRadius = (float)Math.Sqrt(sqDist);
}