1 //--------------------------------------------------------------------------
4 // This software is part of the EvtGen package developed jointly
5 // for the BaBar and CLEO collaborations. If you use all or part
6 // of it, please give an appropriate acknowledgement.
8 // Copyright Information: See EvtGen/COPYRIGHT
9 // Copyright (C) 1998 Caltech, UCSB
11 // Module: EvtVector3R.cc
13 // Description: Real implementation of 3-vectors
15 // Modification history:
17 // RYD September 5, 1997 Module created
19 //------------------------------------------------------------------------
21 #include "EvtGenBase/EvtPatches.hh"
24 #include "EvtGenBase/EvtVector3R.hh"
29 EvtVector3R::~EvtVector3R(){}
31 EvtVector3R::EvtVector3R(){
37 EvtVector3R::EvtVector3R(double x,double y, double z){
39 v[0]=x; v[1]=y; v[2]=z;
42 EvtVector3R rotateEuler(const EvtVector3R& v,
43 double alpha,double beta,double gamma){
46 tmp.applyRotateEuler(alpha,beta,gamma);
52 void EvtVector3R::applyRotateEuler(double phi,double theta,double ksi){
55 double sp,st,sk,cp,ct,ck;
64 temp[0]=( ck*ct*cp-sk*sp)*v[0]+( -sk*ct*cp-ck*sp)*v[1]+st*cp*v[2];
65 temp[1]=( ck*ct*sp+sk*cp)*v[0]+(-sk*ct*sp+ck*cp)*v[1]+st*sp*v[2];
66 temp[2]=-ck*st*v[0]+sk*st*v[1]+ct*v[2];
74 ostream& operator<<(ostream& s,const EvtVector3R& v){
76 s<<"("<<v.v[0]<<","<<v.v[1]<<","<<v.v[2]<<")";
83 EvtVector3R cross( const EvtVector3R& p1,const EvtVector3R& p2 ){
85 //Calcs the cross product. Added by djl on July 27, 1995.
86 //Modified for real vectros by ryd Aug 28-96
88 return EvtVector3R(p1.v[1]*p2.v[2] - p1.v[2]*p2.v[1],
89 p1.v[2]*p2.v[0] - p1.v[0]*p2.v[2],
90 p1.v[0]*p2.v[1] - p1.v[1]*p2.v[0]);
94 double EvtVector3R::d3mag() const
96 // returns the 3 momentum mag.
100 temp = v[0]*v[0]+v[1]*v[1]+v[2]*v[2];
106 double EvtVector3R::dot ( const EvtVector3R& p2 ){
111 temp += v[0]*p2.v[0];
112 temp += v[0]*p2.v[0];