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DDLRotationByAxis.cc

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/***************************************************************************
                          DDLRotationByAxis.cc  -  description
                             -------------------
    begin                : Wed Nov 19, 2003
    email                : case@ucdhep.ucdavis.edu
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *           DDDParser sub-component of DDD                                *
 *                                                                         *
 ***************************************************************************/



// -------------------------------------------------------------------------
// Includes
// -------------------------------------------------------------------------
#include "DDLRotationByAxis.h"
#include "DDLElementRegistry.h"

// DDCore dependencies
#include "DetectorDescription/Core/interface/DDTransform.h"
#include "DetectorDescription/Base/interface/DDdebug.h"
#include "DetectorDescription/Base/interface/DDException.h"
#include "DetectorDescription/Base/interface/DDTranslation.h"
#include "DetectorDescription/ExprAlgo/interface/ExprEvalSingleton.h"

// Root Math dependencies
#include <Math/RotationX.h>
#include <Math/RotationY.h>
#include <Math/RotationZ.h>

#include <string>

// Default constructor
DDLRotationByAxis::DDLRotationByAxis() 
{
}

// Default destructor
DDLRotationByAxis::~DDLRotationByAxis()
{
}

void DDLRotationByAxis::preProcessElement (const std::string& name
                                           , const std::string& nmspace)
{
  pNameSpace = nmspace;
  pName = name;
}

void DDLRotationByAxis::processElement (const std::string& name
                                        , const std::string& nmspace)
{
  DCOUT_V('P', "DDLRotationByAxis::processElement started " << name);

  //  std::cout << "my parent is : " << parent() << std::endl;
  DDXMLAttribute atts = getAttributeSet();
  if (parent() != "RotationSequence")
    {
      std::string axis = atts.find("axis")->second;
      std::string angle = atts.find("angle")->second;
      
      DDRotationMatrix R;
      R = processOne(R, axis, angle);

      DDRotationMatrix* ddr = new DDRotationMatrix(R);
      if (atts.find("name") == atts.end())
        {
          //how do we make up a ddname! damn_it!
          DDXMLElement * myRealParent = DDLElementRegistry::instance()->getElement(parent());
          DDName pName = myRealParent->getDDName(nmspace);
          std::string tn = pName.name() + std::string("Rotation");
          std::vector<std::string> names;
          names.push_back("name");
          //no need, used already names.push_back("axis");
          //no need, used already names.push_back("angle");

          std::vector<std::string> values;
          values.push_back(tn);
          //no need, used already values.push_back(atts.find("axis")->second);
          //no need, used already values.push_back(atts.find("angle")->second);
          clear();
          loadAttributes(name, names, values, nmspace);
        }
      DDRotation rot = DDrot(getDDName(nmspace), ddr);
      
      clear();
    }
  else { } //let the parent handle the clearing, etc.

  DCOUT_V('P', "DDLRotationByAxis::processElement completed");
}

DDRotationMatrix DDLRotationByAxis::processOne (DDRotationMatrix R, std::string& axis, std::string& angle)
{
  ExprEvalInterface & ev = ExprEvalSingleton::instance();
  double dAngle = ev.eval(pNameSpace, angle);
  //  HepRotation R;

  if ( axis == "x") {
    R = ROOT::Math::RotationX(dAngle);
  }
  else if ( axis == "y" ) {
    R = ROOT::Math::RotationY(dAngle);      
  }
  else if ( axis =="z" ) {
    R = ROOT::Math::RotationZ(dAngle);
  }
  else {
    std::string msg = "\nDDLRotationByAxis invalid axis... you must not have validated XML sources!  Element is ";
    msg += pName;
    throwError(msg);
  }
  
  return R;
}

//}

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