/data/refman/pasoursint/CMSSW_5_2_7_hltpatch1/src/Fireworks/Muons/plugins/FWDTDigiProxyBuilder.cc

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/*
 *  FWDTDigiProxyBuilder.cc
 *  FWorks
 *
 *  Created by Ianna Osborne on 6/7/10.
 *
 */

#include "TEveGeoNode.h"
#include "TEvePointSet.h"
#include "TEveCompound.h"
#include "TGeoArb8.h"
#include "TEveBox.h"

#include "Fireworks/Core/interface/FWProxyBuilderBase.h"
#include "Fireworks/Core/interface/FWEventItem.h"
#include "Fireworks/Core/interface/FWGeometry.h"
#include "Fireworks/Core/interface/fwLog.h"

#include "DataFormats/DTDigi/interface/DTDigiCollection.h"

namespace 
{
  void
  addTube( TEveBox* shape, const FWGeometry::GeomDetInfo& info, float localPos[3],  const float* pars )
  {
    const Float_t width = pars[0] / 2.;
    const Float_t thickness = pars[1] / 2.;
    const Float_t length = pars[2] / 2.;
    
    const Float_t vtx[24] = { localPos[0] - width, -length, -thickness,
                              localPos[0] - width,  length, -thickness,
                              localPos[0] + width,  length, -thickness,
                              localPos[0] + width, -length, -thickness,
                              localPos[0] - width, -length,  thickness,
                              localPos[0] - width,  length,  thickness,
                              localPos[0] + width,  length,  thickness,
                              localPos[0] + width, -length,  thickness };
    
    double array[16] = { info.matrix[0], info.matrix[3], info.matrix[6], 0.,
                         info.matrix[1], info.matrix[4], info.matrix[7], 0.,
                         info.matrix[2], info.matrix[5], info.matrix[8], 0.,
                         info.translation[0], info.translation[1], info.translation[2], 1.
    };
    
    shape->SetVertices( vtx );
    shape->SetTransMatrix( array );
    shape->SetDrawFrame(false);
    shape->SetMainTransparency( 75 );
  }
}

class FWDTDigiProxyBuilder : public FWProxyBuilderBase
{
public:
  FWDTDigiProxyBuilder( void ) {}
  virtual ~FWDTDigiProxyBuilder( void ) {}

  virtual bool haveSingleProduct( void ) const { return false; }
           
  REGISTER_PROXYBUILDER_METHODS();
        
private:
  // Disable default copy constructor
  FWDTDigiProxyBuilder( const FWDTDigiProxyBuilder& );
  // Disable default assignment operator
  const FWDTDigiProxyBuilder& operator=( const FWDTDigiProxyBuilder& );
        
  virtual void buildViewType( const FWEventItem* iItem, TEveElementList* product, FWViewType::EType, const FWViewContext* );
};

void
FWDTDigiProxyBuilder::buildViewType( const FWEventItem* iItem, TEveElementList* product, FWViewType::EType type, const FWViewContext* )
{
   const DTDigiCollection* digis = 0;
   iItem->get( digis );
        
   if( ! digis )
   {
      return;
   }
   const FWGeometry *geom = iItem->getGeom();
        
   for( DTDigiCollection::DigiRangeIterator dri = digis->begin(), dre = digis->end(); dri != dre; ++dri )
   {
      const DTLayerId& layerId = (*dri).first;
      unsigned int rawid = layerId.rawId();
      const DTDigiCollection::Range &range = (*dri).second;

      if( ! geom->contains( rawid ))
      {
         fwLog( fwlog::kWarning ) << "failed to get geometry of DT with detid: "
                                  << rawid << std::endl;

         TEveCompound* compound = createCompound();
         setupAddElement( compound, product );

         continue;
      }

      const float* pars = geom->getParameters( rawid );
      FWGeometry::IdToInfoItr det = geom->find( rawid );

      int superLayer = layerId.superlayerId().superLayer();

      float localPos[3] = { 0.0, 0.0, 0.0 };
                
      // Loop over the digis of this DetUnit
      for( DTDigiCollection::const_iterator it = range.first;
           it != range.second; ++it )
      {
         // The x wire position in the layer, starting from its wire number.
         float firstChannel = pars[3];
         float nChannels = pars[5];
         localPos[0] = ((*it).wire() - ( firstChannel - 1 ) - 0.5 ) * pars[0] - nChannels / 2.0 * pars[0];

         if( type == FWViewType::k3D || type == FWViewType::kISpy )
         {
            TEveBox* box = new TEveBox;
            setupAddElement( box, product );
            ::addTube( box, *det, localPos, pars );
         }
         else if(( ( type == FWViewType::kRhoPhi ||  type == FWViewType::kRhoPhiPF ) && superLayer != 2 ) ||
                 ( type == FWViewType::kRhoZ && superLayer == 2 ))
         {
            TEvePointSet* pointSet = new TEvePointSet;
            pointSet->SetMarkerStyle( 24 );
            setupAddElement( pointSet, product);        

            float globalPos[3];                 
            geom->localToGlobal( *det, localPos, globalPos );
            pointSet->SetNextPoint( globalPos[0],  globalPos[1],  globalPos[2] );

            TEveBox* box = new TEveBox;
            setupAddElement( box, product );
            ::addTube( box, *det, localPos, pars );
         }
         else
         {
            TEveCompound* compound = createCompound();
            setupAddElement( compound, product );

         }
      }         
   }
}

REGISTER_FWPROXYBUILDER( FWDTDigiProxyBuilder, DTDigiCollection, "DT Digis", FWViewType::kAll3DBits | FWViewType::kAllRPZBits );