void EUTelGeometryTelescopeGeoDescription::translateSiPlane2TGeo(TGeoVolume* pvolumeWorld, int SensorId ) {
double xc, yc, zc; // volume center position
double alpha, beta, gamma;
double rotRef1, rotRef2, rotRef3, rotRef4;
std::stringstream strId;
strId << SensorId;
// Get sensor center position
xc = siPlaneXPosition( SensorId );
yc = siPlaneYPosition( SensorId );
zc = siPlaneZPosition( SensorId );
// Get sensor orientation
alpha = siPlaneXRotation( SensorId ); // in degrees !
beta = siPlaneYRotation( SensorId ); //
gamma = siPlaneZRotation( SensorId ); //
rotRef1 = siPlaneRotation1( SensorId );
rotRef2 = siPlaneRotation2( SensorId );
rotRef3 = siPlaneRotation3( SensorId );
rotRef4 = siPlaneRotation4( SensorId );
//We must check that the input is correct. Since this is a combination of initial rotations and reflections the determinate must be 1 or -1
float determinant = rotRef1*rotRef4 - rotRef2*rotRef3 ;
if(determinant==1 or determinant==-1) {
streamlog_out(DEBUG5) << "SensorID: " << SensorId << ". Determinant = " <<determinant <<" This is the correct determinate for this transformation." << std::endl;
} else {
streamlog_out(ERROR5) << "SensorID: " << SensorId << ". Determinant = " <<determinant << std::endl;
throw(lcio::Exception("The initial rotation and reflection matrix does not have determinant of 1 or -1. Gear file input must be wrong."));
}
//Create spatial TGeoTranslation object.
std::string stTranslationName = "matrixTranslationSensor";
stTranslationName.append( strId.str() );
TGeoTranslation* pMatrixTrans = new TGeoTranslation( stTranslationName.c_str(), xc, yc, zc );
//ALL clsses deriving from TGeoMatrix are not owned by the ROOT geometry manager, invoking RegisterYourself() transfers
//ownership and thus ROOT will clean up
pMatrixTrans->RegisterYourself();
//Create TGeoRotation object.
//Translations are of course just positional changes in the global frame.
//Note that each subsequent rotation is using the new coordinate system of the last transformation all the way back to the global frame.
//The way to think about this is that each rotation is the multiplication of the last rotation matrix by a new one.
//The order is:
//Integer Z rotation and reflections.
//Z rotations specified by in degrees.
//X rotations
//Y rotations
TGeoRotation* pMatrixRotRefCombined = new TGeoRotation();
//We have to ensure that we retain a right handed coordinate system, i.e. if we only flip the x or y axis, we have to also flip the z-axis. If we flip both we have to flip twice.
double integerRotationsAndReflections[9]={rotRef1,rotRef2,0,rotRef3,rotRef4,0,0,0, determinant};
pMatrixRotRefCombined->SetMatrix(integerRotationsAndReflections);
std::cout << "Rotating plane " << SensorId << " to gamma: " << gamma << std::endl;
pMatrixRotRefCombined->RotateZ(gamma);//Z Rotation (degrees)//This will again rotate a vector around z axis usign the right hand rule.
pMatrixRotRefCombined->RotateX(alpha);//X Rotations (degrees)//This will rotate a vector usign the right hand rule round the x-axis
pMatrixRotRefCombined->RotateY(beta);//Y Rotations (degrees)//Same again for Y axis
pMatrixRotRefCombined->RegisterYourself();//We must allow the matrix to be used by the TGeo manager.
// Combined translation and orientation
TGeoCombiTrans* combi = new TGeoCombiTrans( *pMatrixTrans, *pMatrixRotRefCombined );
//This is to print to screen the rotation and translation matrices used to transform from local to global frame.
streamlog_out(MESSAGE9) << "THESE MATRICES ARE USED TO TAKE A POINT IN THE LOCAL FRAME AND MOVE IT TO THE GLOBAL FRAME." << std::endl;
streamlog_out(MESSAGE9) << "SensorID: " << SensorId << " Rotation/Reflection matrix for this object." << std::endl;
const double* rotationMatrix = combi->GetRotationMatrix();
streamlog_out(MESSAGE9) << std::setw(10) <<rotationMatrix[0]<<" "<<rotationMatrix[1]<<" "<<rotationMatrix[2]<< std::endl;
streamlog_out(MESSAGE9) << std::setw(10) <<rotationMatrix[3]<<" "<<rotationMatrix[4]<<" "<<rotationMatrix[5]<< std::endl;
streamlog_out(MESSAGE9) << std::setw(10) <<rotationMatrix[6]<<" "<<rotationMatrix[7]<<" "<<rotationMatrix[8]<< std::endl;
//streamlog_out(MESSAGE9) << std::setw(10) <<rotationMatrix[0] << std::setw(10) <<rotationMatrix[1]<< std::setw(10) <<rotationMatrix[2]<< std::setw(10)<< std::endl<< std::endl;
//streamlog_out(MESSAGE9) << std::setw(10) <<rotationMatrix[3] << std::setw(10) <<rotationMatrix[4]<< std::setw(10) <<rotationMatrix[5]<< std::setw(10)<< std::endl<< std::endl;
//streamlog_out(MESSAGE9) << std::setw(10) <<rotationMatrix[6] << std::setw(10) <<rotationMatrix[7]<< std::setw(10) <<rotationMatrix[8]<< std::setw(10)<< std::endl<< std::endl;
const double* translationMatrix = combi->GetTranslation();
streamlog_out(MESSAGE9) << "SensorID: " << SensorId << " Translation vector for this object." << std::endl;
streamlog_out(MESSAGE9) << std::setw(10) <<translationMatrix[0] << std::setw(10) <<translationMatrix[1]<< std::setw(10) <<translationMatrix[2]<< std::setw(10)<< std::endl;
combi->RegisterYourself();
// Construct object medium. Required for radiation length determination
// assume SILICON, though all information except of radiation length is ignored
double a = 28.085500;
double z = 14.000000;
double density = 2.330000;
double radl = siPlaneRadLength( SensorId );
double absl = 45.753206;
std::string stMatName = "materialSensor";
stMatName.append( strId.str() );
TGeoMaterial* pMat = new TGeoMaterial( stMatName.c_str(), a, z, density, -radl, absl );
pMat->SetIndex( 1 );
// Medium: medium_Sensor_SILICON
int numed = 0; // medium number
double par[8];
par[0] = 0.000000; // isvol
par[1] = 0.000000; // ifield
par[2] = 0.000000; // fieldm
par[3] = 0.000000; // tmaxfd
par[4] = 0.000000; // stemax
par[5] = 0.000000; // deemax
par[6] = 0.000000; // epsil
par[7] = 0.000000; // stmin
std::string stMedName = "mediumSensor";
stMedName.append( strId.str() );
TGeoMedium* pMed = new TGeoMedium( stMedName.c_str(), numed, pMat, par );
// Construct object shape
// Shape: Box type: TGeoBBox
// TGeo requires half-width of box side
Double_t dx = siPlaneXSize( SensorId ) / 2.;
Double_t dy = siPlaneYSize( SensorId ) / 2.;
Double_t dz = siPlaneZSize( SensorId ) / 2.;
TGeoShape *pBoxSensor = new TGeoBBox( "BoxSensor", dx, dy, dz );
std::cout << "Box for sensor: " << SensorId << " is: " << dx << "|" << dy << "|" << dz << '\n';
// Geometry navigation package requires following names for objects that have an ID name:ID
std::string stVolName = "volume_SensorID:";
stVolName.append( strId.str() );
_planePath.insert( std::make_pair(SensorId, "/volume_World_1/"+stVolName+"_1") );
TGeoVolume* pvolumeSensor = new TGeoVolume( stVolName.c_str(), pBoxSensor, pMed );
pvolumeSensor->SetVisLeaves( kTRUE );
pvolumeWorld->AddNode(pvolumeSensor, 1/*(SensorId)*/, combi);
//this line tells the pixel geometry manager to load the pixel geometry into the plane
streamlog_out(DEBUG1) << " sensorID: " << SensorId << " " << stVolName << std::endl;
std::string name = geoLibName(SensorId);
if( name == "CAST" ) {
_pixGeoMgr->addCastedPlane( SensorId, siPlaneXNpixels(SensorId), siPlaneYNpixels(SensorId), siPlaneXSize(SensorId), siPlaneYSize(SensorId), siPlaneZSize(SensorId), siPlaneRadLength(SensorId), stVolName);
} else {
_pixGeoMgr->addPlane( SensorId, name, stVolName);
updatePlaneInfo(SensorId);
}
}
/**
* Initialise ROOT geometry objects from GEAR objects
*
* @param geomName name of ROOT geometry object
* @param dumpRoot dump automatically generated ROOT geometry file for further inspection
*/
void EUTelGeometryTelescopeGeoDescription::initializeTGeoDescription( std::string& geomName, bool dumpRoot = false ) {
// #ifdef USE_TGEO
// get access to ROOT's geometry manager
if( _isGeoInitialized )
{
streamlog_out( WARNING3 ) << "EUTelGeometryTelescopeGeoDescription: Geometry already initialized, using old initialization" << std::endl;
return;
}
else
{
_geoManager = new TGeoManager("Telescope", "v0.1");
}
if( !_geoManager )
{
streamlog_out( ERROR3 ) << "Can't instantiate ROOT TGeoManager " << std::endl;
return;
}
// Create top world volume containing telescope/DUT geometry
// Create air mixture
// see http://pdg.lbl.gov/2013/AtomicNuclearProperties/HTML_PAGES/104.html
double air_density = 1.2e-3; // g/cm^3
double air_radlen = 36.62; // g/cm^2
TGeoMixture* pMatAir = new TGeoMixture("AIR",3,air_density);
pMatAir->DefineElement(0, 14.007, 7., 0.755267 ); //Nitrogen
pMatAir->DefineElement(1, 15.999, 8., 0.231781 ); //Oxygen
pMatAir->DefineElement(2, 39.948, 18., 0.012827 ); //Argon
pMatAir->DefineElement(3, 12.011, 6., 0.000124 ); //Carbon
pMatAir->SetRadLen( air_radlen );
// Medium: medium_World_AIR
TGeoMedium* pMedAir = new TGeoMedium("medium_World_AIR", 3, pMatAir );
// The World is the 10 x 10m x 10m box filled with air mixture
Double_t dx,dy,dz;
dx = 5000.000000; // [mm]
dy = 5000.000000; // [mm]
dz = 5000.000000; // [mm]
TGeoShape *pBoxWorld = new TGeoBBox("Box_World", dx,dy,dz);
// Volume: volume_World
TGeoVolume* pvolumeWorld = new TGeoVolume("volume_World",pBoxWorld, pMedAir);
pvolumeWorld->SetLineColor(4);
pvolumeWorld->SetLineWidth(3);
pvolumeWorld->SetVisLeaves(kTRUE);
// Set top volume of geometry
gGeoManager->SetTopVolume( pvolumeWorld );
// Iterate over registered GEAR objects and construct their TGeo representation
const Double_t PI = 3.141592653589793;
const Double_t DEG = 180./PI;
double xc, yc, zc; // volume center position
double alpha, beta, gamma;
IntVec::const_iterator itrPlaneId;
for ( itrPlaneId = _sensorIDVec.begin(); itrPlaneId != _sensorIDVec.end(); ++itrPlaneId ) {
std::stringstream strId;
strId << *itrPlaneId;
// Get sensor center position
xc = siPlaneXPosition( *itrPlaneId );
yc = siPlaneYPosition( *itrPlaneId );
zc = siPlaneZPosition( *itrPlaneId );
// Get sensor orientation
alpha = siPlaneXRotation( *itrPlaneId ); // [rad]
beta = siPlaneYRotation( *itrPlaneId ); // [rad]
gamma = siPlaneZRotation( *itrPlaneId ); // [rad]
// Spatial translations of the sensor center
string stTranslationName = "matrixTranslationSensor";
stTranslationName.append( strId.str() );
TGeoTranslation* pMatrixTrans = new TGeoTranslation( stTranslationName.c_str(), xc, yc, zc );
//ALL clsses deriving from TGeoMatrix are not owned by the ROOT geometry manager, invoking RegisterYourself() transfers
//ownership and thus ROOT will clean up
pMatrixTrans->RegisterYourself();
// Spatial rotation around sensor center
// TGeoRotation requires Euler angles in degrees
string stRotationName = "matrixRotationSensorX";
stRotationName.append( strId.str() );
TGeoRotation* pMatrixRotX = new TGeoRotation( stRotationName.c_str(), 0., alpha*DEG, 0.); // around X axis
stRotationName = "matrixRotationSensorY";
stRotationName.append( strId.str() );
TGeoRotation* pMatrixRotY = new TGeoRotation( stRotationName.c_str(), 90., beta*DEG, 0.); // around Y axis (combination of rotation around Z axis and new X axis)
stRotationName = "matrixRotationSensorBackY";
stRotationName.append( strId.str() );
TGeoRotation* pMatrixRotY1 = new TGeoRotation( stRotationName.c_str(), -90., 0., 0.); // restoration of original orientation (valid in small angle approximataion ~< 15 deg)
stRotationName = "matrixRotationSensorZ";
stRotationName.append( strId.str() );
TGeoRotation* pMatrixRotZ = new TGeoRotation( stRotationName.c_str(), 0. , 0., gamma*DEG); // around Z axis
// Combined rotation in several steps
TGeoRotation* pMatrixRot = new TGeoRotation( *pMatrixRotX );
pMatrixRot->MultiplyBy( pMatrixRotY );
pMatrixRot->MultiplyBy( pMatrixRotY1 );
pMatrixRot->MultiplyBy( pMatrixRotZ );
pMatrixRot->RegisterYourself();
pMatrixRotX->RegisterYourself();
pMatrixRotY->RegisterYourself();
pMatrixRotY1->RegisterYourself();
pMatrixRotZ->RegisterYourself();
// Combined translation and orientation
TGeoCombiTrans* combi = new TGeoCombiTrans( *pMatrixTrans, *pMatrixRot );
combi->RegisterYourself();
// Construction of sensor objects
// Construct object medium. Required for radiation length determination
// assume SILICON, though all information except of radiation length is ignored
double a = 28.085500;
double z = 14.000000;
double density = 2.330000;
double radl = siPlaneMediumRadLen( *itrPlaneId );
double absl = 45.753206;
string stMatName = "materialSensor";
stMatName.append( strId.str() );
TGeoMaterial* pMat = new TGeoMaterial( stMatName.c_str(), a, z, density, radl, absl );
pMat->SetIndex( 1 );
// Medium: medium_Sensor_SILICON
int numed = 0; // medium number
double par[8];
par[0] = 0.000000; // isvol
par[1] = 0.000000; // ifield
par[2] = 0.000000; // fieldm
par[3] = 0.000000; // tmaxfd
par[4] = 0.000000; // stemax
par[5] = 0.000000; // deemax
par[6] = 0.000000; // epsil
par[7] = 0.000000; // stmin
string stMedName = "mediumSensor";
stMedName.append( strId.str() );
TGeoMedium* pMed = new TGeoMedium( stMedName.c_str(), numed, pMat, par );
// Construct object shape
// Shape: Box type: TGeoBBox
// TGeo requires half-width of box side
dx = siPlaneXSize( *itrPlaneId ) / 2.;
dy = siPlaneYSize( *itrPlaneId ) / 2.;
dz = siPlaneZSize( *itrPlaneId ) / 2.;
TGeoShape *pBoxSensor = new TGeoBBox( "BoxSensor", dx, dy, dz );
// Volume: volume_Sensor1
// Geometry navigation package requires following names for objects that have an ID
// name:ID
string stVolName = "volume_SensorID:";
stVolName.append( strId.str() );
_planePath.insert( std::make_pair(*itrPlaneId, "/volume_World_1/"+stVolName+"_1") );
TGeoVolume* pvolumeSensor = new TGeoVolume( stVolName.c_str(), pBoxSensor, pMed );
pvolumeSensor->SetVisLeaves( kTRUE );
pvolumeWorld->AddNode(pvolumeSensor, 1/*(*itrPlaneId)*/, combi);
//this line tells the pixel geometry manager to load the pixel geometry into the plane
_pixGeoMgr->addPlane( *itrPlaneId, geoLibName( *itrPlaneId), stVolName);
} // loop over sensorID
_geoManager->CloseGeometry();
_isGeoInitialized = true;
// Dump ROOT TGeo object into file
if ( dumpRoot ) _geoManager->Export( geomName.c_str() );
// #endif //USE_TGEO
return;
}