/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/DetectorDescription/Algorithm/src/DDLinear.cc

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#include "DetectorDescription/Algorithm/interface/DDLinear.h"
#include "DetectorDescription/Core/interface/DDCurrentNamespace.h"
#include "DetectorDescription/Core/interface/DDSplit.h"
#include "DetectorDescription/Base/interface/DDutils.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "CLHEP/Units/GlobalSystemOfUnits.h"

DDLinear::DDLinear( void )
  : m_n( 1 ),
    m_startCopyNo( 1 ),
    m_incrCopyNo( 1 ),
    m_theta( 0. ),
    m_phi( 0. ),
    m_delta( 0. )
{
  LogDebug( "DDAlgorithm" ) << "DDLinear: Creating an instance.";
}

DDLinear::~DDLinear( void ) 
{}

void
DDLinear::initialize( const DDNumericArguments & nArgs,
                      const DDVectorArguments & vArgs,
                      const DDMapArguments & ,
                      const DDStringArguments & sArgs,
                      const DDStringVectorArguments &  )
{
  m_n           = int(nArgs["N"]);
  m_startCopyNo = int(nArgs["StartCopyNo"]);
  m_incrCopyNo  = int(nArgs["IncrCopyNo"]);
  m_theta       = nArgs["Theta"];
  m_phi         = nArgs["Phi"];
  // FIXME: m_offset      = nArgs["Offset"];
  m_delta       = nArgs["Delta"];
  m_base        = vArgs["Base"];

  LogDebug( "DDAlgorithm" ) << "DDLinear: Parameters for position"
                            << "ing:: n " << m_n << " Direction Theta, Phi, Offset, Delta " 
                            << m_theta/CLHEP::deg << " " 
                            << m_phi/CLHEP::deg << " "
    // FIXME: << m_offset/CLHEP::deg
                            << " " << m_delta/CLHEP::deg
                            << " Base " << m_base[0] 
                            << ", " << m_base[1] << ", " << m_base[2];
  
  m_childNmNs   = DDSplit( sArgs["ChildName"] );
  if( m_childNmNs.second.empty())
    m_childNmNs.second = DDCurrentNamespace::ns();
  
  DDName parentName = parent().name();
  LogDebug( "DDAlgorithm" ) << "DDLinear: Parent " << parentName 
                            << "\tChild " << m_childNmNs.first << " NameSpace "
                            << m_childNmNs.second;
}

void
DDLinear::execute( DDCompactView& cpv )
{
  DDName mother = parent().name();
  DDName ddname( m_childNmNs.first, m_childNmNs.second );
  int    copy   = m_startCopyNo;

  DDTranslation direction( sin( m_theta ) * cos( m_phi ),
                           sin( m_theta ) * sin( m_phi ),
                           cos( m_theta ));
                 
  DDTranslation basetr( m_base[0],
                        m_base[1],
                        m_base[2] );                      
                            
  DDRotation rotation = DDRotation( "IdentityRotation" );
  if( !rotation )
  {
    LogDebug( "DDAlgorithm" ) << "DDLinear: Creating a new "
                              << "rotation: IdentityRotation for " << ddname;
        
    rotation = DDrot( "IdentityRotation", new DDRotationMatrix());
  }
  
  for( int i = 0; i < m_n; ++i )
  {
    DDTranslation tran = basetr + ( /*m_offset + */ double( copy ) * m_delta ) * direction;           
    cpv.position( ddname, mother, copy, tran, rotation );
    LogDebug( "DDAlgorithm" ) << "DDLinear: " << m_childNmNs.second << ":" << m_childNmNs.first << " number " 
                              << copy << " positioned in " << mother << " at "
                              << tran << " with " << rotation;
    copy += m_incrCopyNo;
  }
}