* about the suitability of this software for any purpose. It is *
* provided "as is" without express or implied warranty. *
**************************************************************************/
+
+/* $Id$ */
+
///////////////////////////////////////////////////////////////////
// //
// A straight line is coded as a point (3 Double_t) and //
// 3 direction cosines //
// //
///////////////////////////////////////////////////////////////////
+
#include <Riostream.h>
#include <TTree.h>
+#include <TMath.h>
+
#include "AliStrLine.h"
ClassImp(AliStrLine)
//________________________________________________________
-AliStrLine::AliStrLine() {
+AliStrLine::AliStrLine() :
+ TObject(),
+ fTpar(0),
+ fDebug(0)
+ {
// Default constructor
for(Int_t i=0;i<3;i++) {
fP0[i] = 0.;
+ fSigma2P0[i] = 0.;
fCd[i] = 0.;
}
- fTpar = 0.;
- SetDebug();
+ for(Int_t i=0;i<9;i++) fWMatrix[i] = 0.;
+}
+
+//________________________________________________________
+AliStrLine::AliStrLine(Double_t *point, Double_t *cd,Bool_t twopoints) :
+ TObject(),
+ fTpar(0),
+ fDebug(0)
+{
+ // Standard constructor
+ // if twopoints is true: point and cd are the 3D coordinates of
+ // two points defininig the straight line
+ // if twopoint is false: point represents the 3D coordinates of a point
+ // belonging to the straight line and cd is the
+ // direction in space
+ for(Int_t i=0;i<3;i++){
+ fSigma2P0[i] = 0.;
+ }
+ for(Int_t i=0;i<9;i++) fWMatrix[i] = 0.;
+ if(twopoints){
+ InitTwoPoints(point,cd);
+ }
+ else {
+ InitDirection(point,cd);
+ }
}
//________________________________________________________
-AliStrLine::AliStrLine(Double_t *point, Double_t *cd) {
+AliStrLine::AliStrLine(Float_t *pointf, Float_t *cdf,Bool_t twopoints) :
+ TObject(),
+ fTpar(0),
+ fDebug(0)
+{
+ // Standard constructor - with float arguments
+ // if twopoints is true: point and cd are the 3D coordinates of
+ // two points defininig the straight line
+ // if twopoint is false: point represents the 3D coordinates of a point
+ // belonging to the straight line and cd is the
+ // direction in space
+ Double_t point[3];
+ Double_t cd[3];
+ for(Int_t i=0;i<3;i++){
+ point[i] = pointf[i];
+ cd[i] = cdf[i];
+ fSigma2P0[i] = 0.;
+ }
+ for(Int_t i=0;i<9;i++) fWMatrix[i] = 0.;
+ if(twopoints){
+ InitTwoPoints(point,cd);
+ }
+ else {
+ InitDirection(point,cd);
+ }
+}
+
+//________________________________________________________
+AliStrLine::AliStrLine(Double_t *point, Double_t *sig2point, Double_t *cd,Bool_t twopoints) :
+ TObject(),
+ fTpar(0),
+ fDebug(0)
+{
// Standard constructor
+ // if twopoints is true: point and cd are the 3D coordinates of
+ // two points defininig the straight line
+ // if twopoint is false: point represents the 3D coordinates of a point
+ // belonging to the straight line and cd is the
+ // direction in space
+ for(Int_t i=0;i<3;i++){
+ fSigma2P0[i] = sig2point[i];
+ }
+ for(Int_t i=0;i<9;i++) fWMatrix[i] = 0.;
+ if(twopoints){
+ InitTwoPoints(point,cd);
+ }
+ else {
+ InitDirection(point,cd);
+ }
+}
+
+//________________________________________________________
+AliStrLine::AliStrLine(Float_t *pointf, Float_t *sig2point, Float_t *cdf,Bool_t twopoints) :
+ TObject(),
+ fTpar(0),
+ fDebug(0)
+{
+ // Standard constructor - with float arguments
+ // if twopoints is true: point and cd are the 3D coordinates of
+ // two points defininig the straight line
+ // if twopoint is false: point represents the 3D coordinates of a point
+ // belonging to the straight line and cd is the
+ // direction in space
+ Double_t point[3];
+ Double_t cd[3];
+ for(Int_t i=0;i<3;i++){
+ point[i] = pointf[i];
+ cd[i] = cdf[i];
+ fSigma2P0[i] = sig2point[i];
+ }
+ for(Int_t i=0;i<9;i++) fWMatrix[i] = 0.;
+ if(twopoints){
+ InitTwoPoints(point,cd);
+ }
+ else {
+ InitDirection(point,cd);
+ }
+}
+//________________________________________________________
+AliStrLine::AliStrLine(Double_t *point, Double_t *sig2point, Double_t *wmat, Double_t *cd,Bool_t twopoints) :
+ TObject(),
+ fTpar(0),
+ fDebug(0)
+{
+ // Standard constructor
+ // if twopoints is true: point and cd are the 3D coordinates of
+ // two points defininig the straight line
+ // if twopoint is false: point represents the 3D coordinates of a point
+ // belonging to the straight line and cd is the
+ // direction in space
+ for(Int_t i=0;i<3;i++){
+ fSigma2P0[i] = sig2point[i];
+ }
+ for(Int_t i=0;i<9;i++) fWMatrix[i] = wmat[i];
+ if(twopoints){
+ InitTwoPoints(point,cd);
+ }
+ else {
+ InitDirection(point,cd);
+ }
+}
+
+//________________________________________________________
+AliStrLine::AliStrLine(Float_t *pointf, Float_t *sig2point, Float_t *wmat, Float_t *cdf,Bool_t twopoints) :
+ TObject(),
+ fTpar(0),
+ fDebug(0)
+{
+ // Standard constructor - with float arguments
+ // if twopoints is true: point and cd are the 3D coordinates of
+ // two points defininig the straight line
+ // if twopoint is false: point represents the 3D coordinates of a point
+ // belonging to the straight line and cd is the
+ // direction in space
+ Double_t point[3];
+ Double_t cd[3];
+ for(Int_t i=0;i<3;i++){
+ point[i] = pointf[i];
+ cd[i] = cdf[i];
+ fSigma2P0[i] = sig2point[i];
+ }
+ for(Int_t i=0;i<9;i++) fWMatrix[i] = wmat[i];
+ if(twopoints){
+ InitTwoPoints(point,cd);
+ }
+ else {
+ InitDirection(point,cd);
+ }
+}
+//________________________________________________________
+void AliStrLine::InitDirection(Double_t *point, Double_t *cd){
+ // Initialization from a point and a direction
Double_t norm = 0.;
for(Int_t i=0;i<3;i++)norm+=cd[i]*cd[i];
if(norm) {
SetDebug();
}
+//________________________________________________________
+void AliStrLine::InitTwoPoints(Double_t *pA, Double_t *pB){
+ // Initialization from the coordinates of two
+ // points in the space
+ Double_t cd[3];
+ for(Int_t i=0;i<3;i++)cd[i] = pB[i]-pA[i];
+ InitDirection(pA,cd);
+}
+
//________________________________________________________
AliStrLine::~AliStrLine() {
// destructor
cout <<"Known point: ";
for(Int_t i=0;i<3;i++)cout <<fP0[i]<<"; ";
cout <<endl;
+ cout <<"Error on known point: ";
+ for(Int_t i=0;i<3;i++)cout <<TMath::Sqrt(fSigma2P0[i])<<"; ";
+ cout <<endl;
cout <<"Current value for the parameter: "<<fTpar<<endl;
cout <<" Debug flag: "<<fDebug<<endl;
}
}
//___________________________________________________________
-Double_t AliStrLine::GetDCA(AliStrLine *line){
+Double_t AliStrLine::GetDCA(AliStrLine *line) const{
//Returns the distance of closest approach between two lines
Double_t p2[3];
Double_t cd2[3];
// Fills the array point with the current value on the line
for(Int_t i=0;i<3;i++)point[i]=fP0[i]+fCd[i]*fTpar;
}
+
+//________________________________________________________
+Double_t AliStrLine::GetDistFromPoint(Double_t *point) const {
+ // computes distance from point
+ AliStrLine tmp(point,(Double_t *)fCd,kFALSE);
+ return this->GetDCA(&tmp);
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff