FairGeoTorus.cxx

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//*-- AUTHOR : M. Al-Turany  06/11/2006

//
// FairGeoTorus
//
// class for the shape Torus
// A torus has 5 parameters :
//            R    - axial radius
//            Rmin - inner radius
//            Rmax - outer radius
//            Phi1 - starting phi
//            Dphi - phi extent

#include "FairGeoTorus.h"

#include "FairGeoVolume.h"
#include "FairGeoVector.h"

#include "TArrayD.h"

ClassImp(FairGeoTorus)

FairGeoTorus::FairGeoTorus()
  :FairGeoBasicShape()
{
  // constructor
  fName="TORUS";
  nPoints=5;
  nParam=5;
  param=new TArrayD(nParam);
}


FairGeoTorus::~FairGeoTorus()
{
  // destructor
  if (param) {
    delete param;
    param=0;
  }
  if (center) {
    delete center;
    center=0;
  }
  if (position) {
    delete position;
    position=0;
  }
}

Int_t FairGeoTorus::readPoints(std::fstream* pFile,FairGeoVolume* volu)
{
  // reads nPoints with 3 components from Ascii file
  // if the array of points is not existing in the volume it is created and
  // the values are stored inside
  // returns the number of points
  if (!pFile) { return 0; }
  if (volu->getNumPoints()!=nPoints) { volu->createPoints(nPoints); }
  Double_t x;
  const Int_t maxbuf=155;
  Text_t buf[maxbuf];
  for(Int_t i=0; i<nPoints; i++) {
    pFile->getline(buf,maxbuf);
    sscanf(buf,"%lf",&x);
    volu->setPoint(i,x,0,0);
  }
  return nPoints;
}


TArrayD* FairGeoTorus::calcVoluParam(FairGeoVolume* volu)
{
  // calculates the parameters needed to create the shape

  for(Int_t i=0; i<3; i++) {
    FairGeoVector v=*(volu->getPoint(i));
    v*=(1/10.);
    param->AddAt(v(0),i);
  }
  FairGeoVector v=*(volu->getPoint(3));
  param->AddAt(v(0),3);

  v=*(volu->getPoint(4));
  param->AddAt(v(0),4);


  return param;
}

Bool_t FairGeoTorus::writePoints(std::fstream* pFile,FairGeoVolume* volu)
{
  // writes the 4 'points' decribed above to ascii file
  if (!pFile) { return kFALSE; }
  Text_t buf[155];
  for(Int_t i=0; i<nPoints; i++) {
    FairGeoVector& v=*(volu->getPoint(i));
    sprintf(buf,"%9.3f\n",v(0));
    pFile->write(buf,strlen(buf));
  }
  return kTRUE;
}


void FairGeoTorus::printPoints(FairGeoVolume* volu)
{
  // prints volume points to screen
  for(Int_t i=0; i<nPoints; i++) {
    FairGeoVector& v=*(volu->getPoint(i));
    printf("%9.3f\n",v(0));
  }
}



void FairGeoTorus::calcVoluPosition(FairGeoVolume* volu,
                                    const FairGeoTransform& dTC,const FairGeoTransform& mTR)
{
  // calls the function posInMother(...) to calculate the position of the
  // volume in its mother
  Double_t t[3]= {0.,0.,0.};
  center->setTransVector(t);
  posInMother(dTC,mTR);
}