BinAdjustmentVolume.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2019 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

// BinAdjustment.hpp, Acts project

#pragma once

#include <stdexcept>
#include "Acts/Geometry/CuboidVolumeBounds.hpp"
#include "Acts/Geometry/CylinderVolumeBounds.hpp"
#include "Acts/Geometry/Volume.hpp"

namespace Acts {

BinUtility adjustBinUtility(const BinUtility& bu,
                            const CylinderVolumeBounds& cBounds) {
  // Default constructor
  BinUtility uBinUtil;
  // The parameters from the cylinder bounds
  double minR = cBounds.get(CylinderVolumeBounds::eMinR);
  double maxR = cBounds.get(CylinderVolumeBounds::eMaxR);
  double minPhi = -cBounds.get(CylinderVolumeBounds::eHalfPhiSector);
  double maxPhi = cBounds.get(CylinderVolumeBounds::eHalfPhiSector);
  double minZ = -cBounds.get(CylinderVolumeBounds::eHalfLengthZ);
  double maxZ = cBounds.get(CylinderVolumeBounds::eHalfLengthZ);
  // Retrieve the binning data
  const std::vector<BinningData>& bData = bu.binningData();
  // Loop over the binning data and adjust the dimensions
  for (auto& bd : bData) {
    // The binning value
    BinningValue bval = bd.binvalue;
    // Throw exceptions is stuff doesn't make sense:
    // - not the right binning value
    // - not equidistant
    if (bd.type == arbitrary) {
      throw std::invalid_argument("Arbirary binning can not be adjusted.");
    } else if (bval != binR and bval != binPhi and bval != binZ) {
      throw std::invalid_argument("Cylinder volume binning must be: phi, r, z");
    }
    float min, max = 0.;
    // Perform the value adjustment
    if (bval == binPhi) {
      min = minPhi;
      max = maxPhi;
    } else if (bval == binR) {
      min = minR;
      max = maxR;
    } else if (bval == binZ) {
      min = minZ;
      max = maxZ;
    }
    // Create the updated BinningData
    BinningData uBinData(bd.option, bval, bd.bins(), min, max);
    uBinUtil += BinUtility(uBinData);
  }
  return uBinUtil;
}

BinUtility adjustBinUtility(const BinUtility& bu,
                            const CuboidVolumeBounds& cBounds) {
  // Default constructor
  BinUtility uBinUtil;
  // The parameters from the cylinder bounds
  double minX = -cBounds.get(CuboidVolumeBounds::eHalfLengthX);
  double maxX = cBounds.get(CuboidVolumeBounds::eHalfLengthX);
  double minY = -cBounds.get(CuboidVolumeBounds::eHalfLengthY);
  double maxY = cBounds.get(CuboidVolumeBounds::eHalfLengthY);
  double minZ = -cBounds.get(CuboidVolumeBounds::eHalfLengthZ);
  double maxZ = cBounds.get(CuboidVolumeBounds::eHalfLengthZ);
  // Retrieve the binning data
  const std::vector<BinningData>& bData = bu.binningData();
  // Loop over the binning data and adjust the dimensions
  for (auto& bd : bData) {
    // The binning value
    BinningValue bval = bd.binvalue;
    // Throw exceptions is stuff doesn't make sense:
    // - not the right binning value
    // - not equidistant
    if (bd.type == arbitrary) {
      throw std::invalid_argument("Arbirary binning can not be adjusted.");
    } else if (bval != binX and bval != binY and bval != binZ) {
      throw std::invalid_argument("Cylinder volume binning must be: x, y, z");
    }
    float min, max = 0.;
    // Perform the value adjustment
    if (bval == binX) {
      min = minX;
      max = maxX;
    } else if (bval == binY) {
      min = minY;
      max = maxY;
    } else if (bval == binZ) {
      min = minZ;
      max = maxZ;
    }
    // Create the updated BinningData
    BinningData uBinData(bd.option, bval, bd.bins(), min, max);
    uBinUtil += BinUtility(uBinData);
  }
  return uBinUtil;
}

BinUtility adjustBinUtility(const BinUtility& bu, const Volume& volume) {
  auto cyBounds =
      dynamic_cast<const CylinderVolumeBounds*>(&(volume.volumeBounds()));
  auto cuBounds =
      dynamic_cast<const CuboidVolumeBounds*>(&(volume.volumeBounds()));

  if (cyBounds != nullptr) {
    // Cylinder bounds
    return adjustBinUtility(bu, *cyBounds);

  } else if (cuBounds != nullptr) {
    // Cylinder bounds
    return adjustBinUtility(bu, *cuBounds);
  }

  throw std::invalid_argument(
      "Bin adjustment not implemented for this volume yet!");

  return BinUtility();
}

}  // namespace Acts