// -*- C++ -*-
// ---------------------------------------------------------------------------
//
// This file is a part of the CLHEP - a Class Library for High Energy Physics.
// 
// This is the definitions of the inline member functions of the
// HepRotationX class
//

#include <cmath>
#include "CLHEP/Units/PhysicalConstants.h"

namespace CLHEP {

inline double HepRotationX::yy() const { return c; }
inline double HepRotationX::yz() const { return -s; }
inline double HepRotationX::zy() const { return s; }
inline double HepRotationX::zz() const { return c; }

inline double HepRotationX::xx() const { return 1.0; }
inline double HepRotationX::xy() const { return 0.0; }
inline double HepRotationX::xz() const { return 0.0; }
inline double HepRotationX::yx() const { return 0.0; }
inline double HepRotationX::zx() const { return 0.0; }

inline HepRep3x3 HepRotationX::rep3x3() const {
  return HepRep3x3 ( 1.0, 0.0, 0.0,
                     0.0,  c,   -s,
                     0.0,  s,   c  );
}

inline HepRotationX::HepRotationX() : d(0.0), s(0.0), c(1.0) {}

inline HepRotationX::HepRotationX(const HepRotationX & orig) : 
	d(orig.d), s(orig.s), c(orig.c)
{}

inline HepRotationX::HepRotationX(double dd, double ss, double cc) :
	d(dd), s(ss), c(cc)
{}

inline HepRotationX & HepRotationX::operator= (const HepRotationX & orig) {
  d = orig.d;
  s = orig.s; 
  c = orig.c;
  return *this;
}

inline HepRotationX::~HepRotationX() {}

inline Hep3Vector HepRotationX::colX() const 
				{ return Hep3Vector ( 1.0, 0.0, 0.0 ); }
inline Hep3Vector HepRotationX::colY() const 
				{ return Hep3Vector ( 0.0,  c,  s ); }
inline Hep3Vector HepRotationX::colZ() const 
				{ return Hep3Vector ( 0.0, -s,  c ); }
 
inline Hep3Vector HepRotationX::rowX() const 
				{ return Hep3Vector ( 1.0, 0.0, 0.0 ); }
inline Hep3Vector HepRotationX::rowY() const 
				{ return Hep3Vector ( 0.0,  c, -s ); }
inline Hep3Vector HepRotationX::rowZ() const 
				{ return Hep3Vector ( 0.0,  s,  c ); }

inline double  HepRotationX::getPhi  () const { return phi();   }
inline double  HepRotationX::getTheta() const { return theta(); }
inline double  HepRotationX::getPsi  () const { return psi();   }
inline double  HepRotationX::getDelta() const { return d; }
inline Hep3Vector HepRotationX::getAxis () const { return axis();  }

inline double  HepRotationX::delta() const { return d; }
inline Hep3Vector HepRotationX::axis() const { return Hep3Vector(1,0,0); }

inline HepAxisAngle HepRotationX::axisAngle() const {
  return HepAxisAngle ( axis(), delta() );
}

inline void HepRotationX::getAngleAxis
			(double & delta, Hep3Vector & axis) const {
  delta = d;
  axis  = getAxis();
}

inline HepLorentzVector HepRotationX::col1() const 
				{ return HepLorentzVector (colX(), 0); }
inline HepLorentzVector HepRotationX::col2() const
				{ return HepLorentzVector (colY(), 0); }
inline HepLorentzVector HepRotationX::col3() const
				{ return HepLorentzVector (colZ(), 0); }
inline HepLorentzVector HepRotationX::col4() const
				{ return HepLorentzVector (0,0,0,1); }
inline HepLorentzVector HepRotationX::row1() const
				{ return HepLorentzVector (rowX(), 0); }
inline HepLorentzVector HepRotationX::row2() const
				{ return HepLorentzVector (rowY(), 0); }
inline HepLorentzVector HepRotationX::row3() const
				{ return HepLorentzVector (rowZ(), 0); }
inline HepLorentzVector HepRotationX::row4() const
				{ return HepLorentzVector (0,0,0,1); }
inline double HepRotationX::xt() const { return 0.0; }
inline double HepRotationX::yt() const { return 0.0; }
inline double HepRotationX::zt() const { return 0.0; }
inline double HepRotationX::tx() const { return 0.0; }
inline double HepRotationX::ty() const { return 0.0; }
inline double HepRotationX::tz() const { return 0.0; }
inline double HepRotationX::tt() const { return 1.0; }

inline HepRep4x4 HepRotationX::rep4x4() const {
  return HepRep4x4 ( 1.0, 0.0, 0.0, 0.0,
                     0.0,  c,   -s, 0.0,
                     0.0,  s,    c, 0.0,
                     0.0, 0.0, 0.0, 1.0 );
}

inline bool HepRotationX::isIdentity() const {
  return ( d==0 );
}

inline int HepRotationX::compare ( const HepRotationX & r  ) const {
  if (d > r.d) return 1; else if (d < r.d) return -1; else return 0;
}

inline bool HepRotationX::operator==(const HepRotationX & r)  const
  { return (d==r.d); }
inline bool HepRotationX::operator!=(const HepRotationX & r)  const
  { return (d!=r.d); }
inline bool HepRotationX::operator>=(const HepRotationX & r)  const
  { return (d>=r.d); }
inline bool HepRotationX::operator<=(const HepRotationX & r)  const
  { return (d<=r.d); }
inline bool HepRotationX::operator> (const HepRotationX & r)  const
  { return (d> r.d); }
inline bool HepRotationX::operator< (const HepRotationX & r)  const
  { return (d< r.d); }

inline void HepRotationX::rectify() { 
  d = proper(d);  // Just in case!
  s = std::sin(d);
  c = std::cos(d);
} 

inline Hep3Vector HepRotationX::operator() (const Hep3Vector & p) const {
  double x = p.x();
  double y = p.y();
  double z = p.z();
  return  Hep3Vector(  x,
                       y * c - z * s,
                       z * c + y * s  );
}

inline Hep3Vector HepRotationX::operator * (const Hep3Vector & p) const {
  return operator()(p);
}

inline HepLorentzVector HepRotationX::operator()
			( const HepLorentzVector & w ) const {
  return  HepLorentzVector( operator() (w.vect()) , w.t() );
}

inline HepLorentzVector HepRotationX::operator * 
					(const HepLorentzVector & p) const {
  return operator()(p);
}

inline HepRotationX & HepRotationX::operator *= (const HepRotationX & m) {
  return *this = (*this) * (m);
}

inline HepRotationX & HepRotationX::transform(const HepRotationX & m) {
  return *this = m * (*this);
}

inline double HepRotationX::proper( double delta ) {
  // -PI < d <= PI
  if ( std::fabs(delta) < CLHEP::pi ) {
    return  delta;
  } else {
    register double x = delta / (CLHEP::twopi);
    return  (CLHEP::twopi) * ( x + std::floor(.5-x) );
  }
}  // proper()

inline HepRotationX HepRotationX::operator * ( const HepRotationX & rx ) const {
  return HepRotationX ( HepRotationX::proper(d+rx.d),
                        s*rx.c + c*rx.s,
                        c*rx.c - s*rx.s );
}

inline HepRotationX HepRotationX::inverse() const {
  return HepRotationX( proper(-d), -s, c ); 
}

inline HepRotationX inverseOf(const HepRotationX & r) {
  return r.inverse();
}

inline HepRotationX & HepRotationX::invert() {
  return *this=inverse();
}

inline double HepRotationX::getTolerance() {
  return Hep4RotationInterface::tolerance;
}       
inline double HepRotationX::setTolerance(double tol) {
  return Hep4RotationInterface::setTolerance(tol);
}

}  // namespace CLHEP