/scratch0/jsnuveri/BDSIM/BDSIMgit/bdsim/src/BDSMultiFacetLayer.cc

#include "BDSGlobalConstants.hh" 
#include "BDSMultiFacetLayer.hh"
#include "BDSMaterials.hh"
#include "G4Box.hh"
#include "G4VisAttributes.hh"
#include "G4LogicalVolume.hh"
#include "G4VPhysicalVolume.hh"
#include "G4PVPlacement.hh"               

//============================================================
BDSMultiFacetLayer::BDSMultiFacetLayer (G4String name, BDSLensFacet* facet, G4double gapWidth, G4double nFacets):
  _facet(facet), _gapWidth(gapWidth), _nFacets(nFacets)
{
  _gapWidth=0;
  _name = name+"_MultiFacetLayer";
  computeDimensions();
  build();
}

void BDSMultiFacetLayer::computeDimensions(){
  _size.setZ(_facet->totalHeight());
  _size.setY(_facet->size().y());
  _size.setX(_nFacets*_facet->size().x() + 
             (_nFacets-1)*_gapWidth);
  //Compute positions of the facets relative to the mother volume.
  G4double x=0,y=0,z=0;
  for(double i=0; i<_nFacets; i++){
    x=(i+0.5)*_facet->size().x()-_size.x()/2.0+i*_gapWidth;
    _facetPos.push_back(G4ThreeVector(x,y,z));
  }
}

void BDSMultiFacetLayer::build(){
  buildScreen();
  placeFacets();
}


void BDSMultiFacetLayer::buildScreen(){
  _solid  = new G4Box((_name+"_solid").c_str(),_size.x()/2.0,_size.z()/2.0,_size.y()/2.0);
  _log = new G4LogicalVolume(_solid,BDSMaterials::Instance()->GetMaterial(BDSGlobalConstants::Instance()->GetVacuumMaterial()),(_name+"_log").c_str(),0,0,0);
  G4VisAttributes* visAtt = new G4VisAttributes();
  visAtt->SetColor(G4Colour(0.7,0.2,0.0,0.3));
  visAtt->SetForceSolid(true);
  _log->SetVisAttributes(visAtt);
}

void BDSMultiFacetLayer::placeFacets(){
  //Place the facets in the mother volume at the locations in _facetPos.
  
  for(int i=0; i<_nFacets; i++){
    new G4PVPlacement(_facet->rotation(), //The facet (trapezoid) must be rotated into the correct coordinate system (z normal to base).
                      _facetPos[i],
                      _facet->log(),
                      _facet->name(),
                      _log,
                      true,
                      i,
                      false);
  }
}

BDSMultiFacetLayer::~BDSMultiFacetLayer(){
}

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