KVFAZIA_2B.cpp

//Created by KVClassFactory on Thu Jan 22 16:02:02 2015
//Author: ,,,
 
#include "KVFAZIA_2B.h"
 
#include "KVUnits.h"
#include "KVFAZIABlock.h"
 
ClassImp(KVFAZIA_2B)
 
 
 
 
KVFAZIA_2B::KVFAZIA_2B()
   : KVFAZIA()
{
   // Default constructor
   SetTitle(ClassName());
}
 
 
 
 
void KVFAZIA_2B::GetGeometryParameters()
{
 
   fNblocks = 2;
   fFGeoType = "";
   fFThetaMin = 6.1;
   fFDist = 100.0;
 
}
 
 
 
 
 
KVFAZIA_2B::~KVFAZIA_2B()
{
   // Destructor
}
 
 
 
 
void KVFAZIA_2B::BuildFAZIA()
{
   Info("BuildFAZIA", "Compact geometry, %f cm from target, theta-min=%f deg.",
        fFDist, fFThetaMin);
 
   TGeoVolume* top = gGeoManager->GetTopVolume();
 
   Double_t distance_block_cible = fFDist * KVUnits::cm;
   Double_t thick_si1 = 300 * KVUnits::um;
   TGeoTranslation trans;
   trans.SetDz(distance_block_cible + thick_si1 / 2.);
 
   KVFAZIABlock* block = new KVFAZIABlock;
 
   Int_t block_starting_number = fStartingBlockNumber;
 
   TGeoRotation rot1, rot2;
   TGeoHMatrix h;
   TGeoHMatrix* ph = 0;
   Double_t theta = 0;
   Double_t phi = 0;
 
   Double_t theta_min = fFThetaMin;//smallest lab polar angle in degrees
   Double_t centre_hole = 2.*tan(theta_min * TMath::DegToRad()) * distance_block_cible;
   Double_t dx = (block->GetTotalSideWithBlindage()) / 2.;
 
   printf("centre_hole=%lf - dx=%lf\n", centre_hole, dx);
 
   Double_t arc = block->GetTotalSideWithBlindage() / (distance_block_cible + thick_si1 / 2.);
   arc /= 2;
   arc *= TMath::RadToDeg();
 
   TVector3 centre;
   for (Int_t bb = 0; bb < fNblocks; bb += 1) {
      /*
      if (bb==0)        centre.SetXYZ(dx - centre_hole / 2, 0, distance_block_cible);
      else if (bb==1)   centre.SetXYZ(dx + centre_hole / 2, 0, distance_block_cible);
      else {
         Warning("BuildFAZIA","Block position definition is done only for %d blocks",fNblocks);
      }
      */
      /*
      theta = centre.Theta() * TMath::RadToDeg();
      phi = centre.Phi() * TMath::RadToDeg();
      */
      theta = theta_min + arc;
      if (bb == 0) phi = 90;
      else if (bb == 1) phi = 360 - 90;
 
      rot2.SetAngles(phi + 90., theta, 0.);
      rot1.SetAngles(-1.*phi, 0., 0.);
      h = rot2 * trans * rot1;
      ph = new TGeoHMatrix(h);
      top->AddNode(block, block_starting_number++, ph);
 
   }
 
}