FWPSimHitProxyBuilder.cc

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/*
 *  FWPSimHitProxyBuilder.cc
 *  FWorks
 *
 *  Created by Ianna Osborne on 9/9/10.
 *
 */

#include "Fireworks/Core/interface/FWSimpleProxyBuilderTemplate.h"
#include "Fireworks/Core/interface/FWEventItem.h"
#include "Fireworks/Core/interface/FWGeometry.h"
#include "Fireworks/Core/interface/fwLog.h"
#include "SimDataFormats/TrackingHit/interface/PSimHit.h"
#include <DataFormats/MuonDetId/interface/DTWireId.h>

#include "TEvePointSet.h"

class FWPSimHitProxyBuilder : public FWSimpleProxyBuilderTemplate<PSimHit> {
public:
  FWPSimHitProxyBuilder(void) {}
  ~FWPSimHitProxyBuilder(void) override {}

  bool haveSingleProduct() const override { return false; }

  REGISTER_PROXYBUILDER_METHODS();

  // Disable default copy constructor
  FWPSimHitProxyBuilder(const FWPSimHitProxyBuilder&) = delete;
  // Disable default assignment operator
  const FWPSimHitProxyBuilder& operator=(const FWPSimHitProxyBuilder&) = delete;

private:
  using FWSimpleProxyBuilderTemplate<PSimHit>::buildViewType;
  void buildViewType(const PSimHit& iData,
                     unsigned int iIndex,
                     TEveElement& oItemHolder,
                     FWViewType::EType type,
                     const FWViewContext*) override;
};

void FWPSimHitProxyBuilder::buildViewType(
    const PSimHit& iData, unsigned int iIndex, TEveElement& oItemHolder, FWViewType::EType type, const FWViewContext*) {
  TEvePointSet* pointSet = new TEvePointSet;
  setupAddElement(pointSet, &oItemHolder);
  const FWGeometry* geom = item()->getGeom();
  unsigned int rawid = iData.detUnitId();
  if (!geom->contains(rawid)) {
    fwLog(fwlog::kError) << "failed to get geometry of detid: " << rawid << std::endl;
    return;
  }

  float local[3] = {iData.localPosition().x(), iData.localPosition().y(), iData.localPosition().z()};
  float global[3];

  // Specialized for DT simhits
  DetId id(rawid);
  if (id.det() == DetId::Muon && id.subdetId() == 1) {
    DTWireId wId(rawid);
    rawid = wId.layerId().rawId();  // DT simhits are in the RF of the DTLayer, but their ID is the id of the wire!
    if (abs(iData.particleType()) != 13) {
      pointSet->SetMarkerStyle(26);  // Draw non-muon simhits (e.g. delta rays) with a different marker
    }
    if (type == FWViewType::kRhoZ) {  //
      // In RhoZ view, draw hits at the middle of the layer in the global Z coordinate,
      // otherwise they won't align with 1D rechits, for which only one coordinate is known.
      if (wId.superLayer() == 2) {
        local[1] = 0;
      } else {
        local[0] = 0;
      }
    }
  }

  geom->localToGlobal(rawid, local, global);
  pointSet->SetNextPoint(global[0], global[1], global[2]);
}

REGISTER_FWPROXYBUILDER(FWPSimHitProxyBuilder, PSimHit, "PSimHits", FWViewType::kAll3DBits | FWViewType::kAllRPZBits);