AxialBox EncloseABox ( Cylinder const & C )
{
Vector center = C.getCenter();
Vector extent( C.getExtentX(), C.getExtentY(), C.getExtentZ() );
return AxialBox(center-extent,center+extent);
}
Sphere EncloseSphere ( Cylinder const & shape )
{
float x = shape.getExtentX();
float y = shape.getExtentY();
float radius = sqrt( x*x + y*y );
return Sphere( shape.getCenter(), radius );
}