PHG4BlockGeomv1.cc

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#include "PHG4BlockGeomv1.h"

#include <algorithm>
#include <cmath>

using namespace std;

PHG4BlockGeomv1::PHG4BlockGeomv1() :
  PHG4BlockGeom(),
  _layer(-1),
  _rotation_z(NAN)
{
  const double filldval = 1.;
  fill( _size, _size + sizeof(_size)/sizeof(double),NAN);
  fill( _center, _center + sizeof(_center)/sizeof(double),NAN);
  fill( &_rot_matrix[0][0], &_rot_matrix[0][0] + sizeof(_rot_matrix)/sizeof(double),filldval);
}

PHG4BlockGeomv1::PHG4BlockGeomv1( const int layer,
                                  const double sizex, const double sizey, const double sizez, 
                                  const double centerx, const double centery, const double centerz, 
                                  const double zrot) :
  PHG4BlockGeom(),
  _layer(layer),
  _rotation_z(zrot)
{
  _size[0] = sizex;
  _size[1] = sizey;
  _size[2] = sizez;
  _center[0] = centerx;
  _center[1] = centery;
  _center[2] = centerz;

  _build_rot_matrix();
}

void
PHG4BlockGeomv1::identify(std::ostream& os) const
{
  os << "PHG4BlockGeomv1: layer: " << _layer 
     << ", rotation in z: " << _rotation_z 
     << ", size: (" << _size[0] << ", " << _size[1] << ", " << _size[2] << ")" 
     << ", center: (" << _center[0] << ", " << _center[1] << ", " << _center[2] << ")" 
     << endl;
  return;
}

void 
PHG4BlockGeomv1::set_size(const double sizex, const double sizey, const double sizez)
{
  _size[0] = sizex;
  _size[1] = sizey;
  _size[2] = sizez;
  return;
}

void 
PHG4BlockGeomv1::set_center(const double centerx, const double centery, const double centerz)
{
  _center[0] = centerx;
  _center[1] = centery;
  _center[2] = centerz;
  return;
}

void PHG4BlockGeomv1::convert_local_to_global(double lx, double ly, double lz,
                                              double &gx, double &gy, double &gz) const
{
  // gvec = R^T lvec + offset
  gx = _rot_matrix[0][0]*lx + _rot_matrix[1][0]*ly + _rot_matrix[2][0]*lz;
  gy = _rot_matrix[0][1]*lx + _rot_matrix[1][1]*ly + _rot_matrix[2][1]*lz;
  gz = _rot_matrix[0][2]*lx + _rot_matrix[1][2]*ly + _rot_matrix[2][2]*lz;
  gx += _center[0];
  gy += _center[1];
  gz += _center[2];
  return;
}

void PHG4BlockGeomv1::convert_global_x_to_local(double gx, double gy, double gz, 
                                                double &lx, double &ly, double &lz) const
{
  // lvec = R (gvec - offset)
  gx -= _center[0];
  gy -= _center[1];
  gz -= _center[2];
  lx = _rot_matrix[0][0]*gx + _rot_matrix[0][1]*gy + _rot_matrix[0][2]*gz;
  ly = _rot_matrix[1][0]*gx + _rot_matrix[1][1]*gy + _rot_matrix[1][2]*gz;
  lz = _rot_matrix[2][0]*gx + _rot_matrix[2][1]*gy + _rot_matrix[2][2]*gz;
  return;
}

void PHG4BlockGeomv1::_build_rot_matrix()
{
  _rot_matrix[0][0] = cos(_rotation_z);
  _rot_matrix[0][1] = sin(_rotation_z);
  _rot_matrix[1][0] = -sin(_rotation_z);
  _rot_matrix[1][1] = cos(_rotation_z);
  _rot_matrix[2][2] = 1.;
}