///////////////////////////////////////////////////////////////////////
//
// Intersection of a vector with a sphere. Given two points, ra and rb,
// with ra inside the sphere of radius SphRad, this function finds the
// point at which the vector from ra to rb intersects the sphere.
//
// Author: W. Heintzelman <billh@hep.upenn.edu>
//
// REVISION HISTORY:
//     02/12/2014 : W. Heintzelman - New file
//
////////////////////////////////////////////////////////////////////////
#ifndef __RAT_SphereCrossPoint__
#define __RAT_SphereCrossPoint__
#include <TVector3.h>

namespace RAT
{

TVector3 SphereCrossPoint(double SphRad,TVector3& ra,TVector3& rb) ;

}   // namespace RAT
#endif