FWRPCDigiProxyBuilder.cc

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// -*- C++ -*-
//
// Package:     Muon
// Class  :     FWRPCDigiProxyBuilder
//
// Implementation:
//     <Notes on implementation>
//
// Original Author: mccauley
//         Created:  Sun Jan  6 23:57:00 EST 2008
//

#include "TEveStraightLineSet.h"
#include "TEveCompound.h"
#include "TEveGeoNode.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/RPCDigi/interface/RPCDigiCollection.h"

class FWRPCDigiProxyBuilder : public FWProxyBuilderBase {
public:
  FWRPCDigiProxyBuilder() {}
  ~FWRPCDigiProxyBuilder() override {}

  REGISTER_PROXYBUILDER_METHODS();

private:
  using FWProxyBuilderBase::build;
  void build(const FWEventItem* iItem, TEveElementList* product, const FWViewContext*) override;
  FWRPCDigiProxyBuilder(const FWRPCDigiProxyBuilder&) = delete;
  const FWRPCDigiProxyBuilder& operator=(const FWRPCDigiProxyBuilder&) = delete;
};

void FWRPCDigiProxyBuilder::build(const FWEventItem* iItem, TEveElementList* product, const FWViewContext*) {
  const RPCDigiCollection* digis = nullptr;

  iItem->get(digis);

  if (!digis) {
    fwLog(fwlog::kWarning) << "Failed to get RPCDigis" << std::endl;
    return;
  }
  const FWGeometry* geom = iItem->getGeom();

  for (RPCDigiCollection::DigiRangeIterator dri = digis->begin(), driEnd = digis->end(); dri != driEnd; ++dri) {
    unsigned int rawid = (*dri).first.rawId();
    const RPCDigiCollection::Range& range = (*dri).second;

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

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

      continue;
    }

    const float* parameters = geom->getParameters(rawid);
    float nStrips = parameters[0];
    float halfStripLength = parameters[1] * 0.5;
    float pitch = parameters[2];
    float offset = -0.5 * nStrips * pitch;

    for (RPCDigiCollection::const_iterator dit = range.first; dit != range.second; ++dit) {
      TEveStraightLineSet* stripDigiSet = new TEveStraightLineSet;
      stripDigiSet->SetLineWidth(3);
      setupAddElement(stripDigiSet, product);

      int strip = (*dit).strip();
      float centreOfStrip = (strip - 0.5) * pitch + offset;

      float localPointTop[3] = {centreOfStrip, halfStripLength, 0.0};

      float localPointBottom[3] = {centreOfStrip, -halfStripLength, 0.0};

      float globalPointTop[3];
      float globalPointBottom[3];

      geom->localToGlobal(rawid, localPointTop, globalPointTop, localPointBottom, globalPointBottom);

      stripDigiSet->AddLine(globalPointTop[0],
                            globalPointTop[1],
                            globalPointTop[2],
                            globalPointBottom[0],
                            globalPointBottom[1],
                            globalPointBottom[2]);
    }
  }
}

REGISTER_FWPROXYBUILDER(FWRPCDigiProxyBuilder,
                        RPCDigiCollection,
                        "RPCDigi",
                        FWViewType::kAll3DBits | FWViewType::kAllRPZBits);