void AddMirrors(AOpticalComponent* opt)
{
// dummy hexagonal prism to cut a spherical mirror
TGeoPgon* mirCut = new TGeoPgon("mirCut", 0., 360., 6, 2);
mirCut->DefineSection(0, -100*mm, 0, kMirrorD/2.);
mirCut->DefineSection(1, 100*mm, 0, kMirrorD/2.);
double theta = TMath::ASin(kMirrorD/TMath::Sqrt(3)/kMirrorR)*TMath::RadToDeg();
TGeoSphere* mirSphere = new TGeoSphere("mirSphere", kMirrorR, kMirrorR + kMirrorT, 180. - theta, 180.);
TGeoTranslation* transZ = new TGeoTranslation("transZ", 0, 0, kMirrorR);
transZ->RegisterYourself();
TGeoCompositeShape* mirComposite = new TGeoCompositeShape("mirComposite", "mirSphere:transZ*mirCut");
AMirror* mirror = new AMirror("mirror", mirComposite);
const int kNMirror = 88;
double dx = kMirrorD/TMath::Sqrt(3);
double dy = kMirrorD/2.;
double x[kNMirror] = {0, 0, 0, 0, 0, 0, 0, 0,
1.5*dx, 1.5*dx, 1.5*dx, 1.5*dx, 1.5*dx,
1.5*dx, 1.5*dx, 1.5*dx, 1.5*dx, 1.5*dx,
-1.5*dx, -1.5*dx, -1.5*dx, -1.5*dx, -1.5*dx,
-1.5*dx, -1.5*dx, -1.5*dx, -1.5*dx, -1.5*dx,
3*dx, 3*dx, 3*dx, 3*dx, 3*dx,
3*dx, 3*dx, 3*dx, 3*dx,
-3*dx, -3*dx, -3*dx, -3*dx, -3*dx,
-3*dx, -3*dx, -3*dx, -3*dx,
4.5*dx, 4.5*dx, 4.5*dx, 4.5*dx,
4.5*dx, 4.5*dx, 4.5*dx, 4.5*dx,
-4.5*dx, -4.5*dx, -4.5*dx, -4.5*dx,
-4.5*dx, -4.5*dx, -4.5*dx, -4.5*dx,
6*dx, 6*dx, 6*dx, 6*dx,
6*dx, 6*dx, 6*dx,
-6*dx, -6*dx, -6*dx, -6*dx,
-6*dx, -6*dx, -6*dx,
7.5*dx, 7.5*dx, 7.5*dx,
7.5*dx, 7.5*dx, 7.5*dx,
-7.5*dx, -7.5*dx, -7.5*dx,
-7.5*dx, -7.5*dx, -7.5*dx};
double y[kNMirror] = {2*dy, 4*dy, 6*dy, 8*dy, -2*dy, -4*dy, -6*dy, -8*dy,
1*dy, 3*dy, 5*dy, 7*dy, 9*dy,
-1*dy, -3*dy, -5*dy, -7*dy, -9*dy,
1*dy, 3*dy, 5*dy, 7*dy, 9*dy,
-1*dy, -3*dy, -5*dy, -7*dy, -9*dy,
0*dy, 2*dy, 4*dy, 6*dy, 8*dy,
-2*dy, -4*dy, -6*dy, -8*dy,
0*dy, 2*dy, 4*dy, 6*dy, 8*dy,
-2*dy, -4*dy, -6*dy, -8*dy,
1*dy, 3*dy, 5*dy, 7*dy,
-1*dy, -3*dy, -5*dy, -7*dy,
1*dy, 3*dy, 5*dy, 7*dy,
-1*dy, -3*dy, -5*dy, -7*dy,
0*dy, 2*dy, 4*dy, 6*dy,
-2*dy, -4*dy, -6*dy,
0*dy, 2*dy, 4*dy, 6*dy,
-2*dy, -4*dy, -6*dy,
1*dy, 3*dy, 5*dy,
-1*dy, -3*dy, -5*dy,
1*dy, 3*dy, 5*dy,
-1*dy, -3*dy, -5*dy};
for(int i = 0; i < kNMirror; i++){
double r2d = TMath::RadToDeg();
double r2 = TMath::Power(x[i], 2) + TMath::Power(y[i], 2);
double z = kF - TMath::Sqrt(TMath::Power(kF, 2) - r2);
// each mirror center is relocated from the origin (0, 0, 0) to (x, y, z)
TGeoTranslation* trans = new TGeoTranslation(Form("mirTrans%d", i), x[i], y[i], z);
// and is rotated to compose a DC optics
double phi = TMath::ATan2(y[i], x[i])*r2d;
TGeoRotation* rot = new TGeoRotation(Form("mirRot%d", i), - phi + 90., 0, 0);
theta = TMath::ATan2(TMath::Sqrt(r2), 2*kF - z)*r2d;
TGeoRotation* rot2 = new TGeoRotation("", phi - 90., theta, 0);
rot->MultiplyBy(rot2, 0);
// make a matrix from translation and rotation matrices
TGeoCombiTrans* combi = new TGeoCombiTrans(*trans, *rot);
// finally add this mirror to the world
opt->AddNode(mirror, i + 1, combi);
} // i
}
/**
* 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;
}