const MaterialVec&MaterialManager:: materialsBetween(const DDSurfaces::Vector3D& p0, const DDSurfaces::Vector3D& p1 , double epsilon) {
if( ( p0 != _p0 ) || ( p1 != _p1 ) ) {
//---------------------------------------
_mV.clear() ;
//
// algorithm copied from TGeoGearDistanceProperties.cc (A.Munnich):
//
double startpoint[3], endpoint[3], direction[3];
double L=0;
for(unsigned int i=0; i<3; i++) {
startpoint[i] = p0[i];
endpoint[i] = p1[i];
direction[i] = endpoint[i] - startpoint[i];
L+=direction[i]*direction[i];
}
double totDist = sqrt( L ) ;
//normalize direction
for(unsigned int i=0; i<3; i++)
direction[i]=direction[i]/totDist;
_tgeoMgr->AddTrack(0, 12 ) ; // electron neutrino
TGeoNode *node1 = _tgeoMgr->InitTrack(startpoint, direction);
//check if there is a node at startpoint
if(!node1)
throw std::runtime_error("No geometry node found at given location. Either there is no node placed here or position is outside of top volume.");
while ( !_tgeoMgr->IsOutside() ) {
// TGeoNode *node2;
// TVirtualGeoTrack *track;
// step to (and over) the next Boundary
TGeoNode * node2 = _tgeoMgr->FindNextBoundaryAndStep( 500, 1) ;
if( !node2 || _tgeoMgr->IsOutside() )
break;
const double *position = _tgeoMgr->GetCurrentPoint();
const double *previouspos = _tgeoMgr->GetLastPoint();
double length = _tgeoMgr->GetStep();
TVirtualGeoTrack *track = _tgeoMgr->GetLastTrack();
//protection against infinitive loop in root which should not happen, but well it does...
//work around until solution within root can be found when the step gets very small e.g. 1e-10
//and the next boundary is never reached
#if 1 //fg: is this still needed ?
if( length < MINSTEP ) {
_tgeoMgr->SetCurrentPoint( position[0] + MINSTEP * direction[0],
position[1] + MINSTEP * direction[1],
position[2] + MINSTEP * direction[2] );
length = _tgeoMgr->GetStep();
node2 = _tgeoMgr->FindNextBoundaryAndStep(500, 1) ;
position = _tgeoMgr->GetCurrentPoint();
previouspos = _tgeoMgr->GetLastPoint();
}
#endif
// printf( " -- step length : %1.8e %1.8e %1.8e %1.8e %1.8e %1.8e %1.8e - %s \n" , length ,
// position[0], position[1], position[2], previouspos[0], previouspos[1], previouspos[2] , node1->GetMedium()->GetMaterial()->GetName() ) ;
DDSurfaces::Vector3D posV( position ) ;
double currDistance = ( posV - p0 ).r() ;
// //if the next boundary is further than end point
// if(fabs(position[0])>fabs(endpoint[0]) || fabs(position[1])>fabs(endpoint[1])
// || fabs(position[2])>fabs(endpoint[2]))
//if we travelled too far:
if( currDistance > totDist ) {
length = sqrt( pow(endpoint[0]-previouspos[0],2) +
pow(endpoint[1]-previouspos[1],2) +
pow(endpoint[2]-previouspos[2],2) );
track->AddPoint( endpoint[0], endpoint[1], endpoint[2], 0. );
if( length > epsilon )
_mV.push_back( std::make_pair( Material( node1->GetMedium() ) , length ) ) ;
break;
}
track->AddPoint( position[0], position[1], position[2], 0.);
if( length > epsilon )
_mV.push_back( std::make_pair( Material( node1->GetMedium() ), length ) ) ;
node1 = node2 ;
}
//fg: protect against empty list:
if( _mV.empty() ){
_mV.push_back( std::make_pair( Material( node1->GetMedium() ), totDist ) ) ;
}
_tgeoMgr->ClearTracks();
_tgeoMgr->CleanGarbage();
//---------------------------------------
_p0 = p0 ;
_p1 = p1 ;
}
return _mV ; ;
}
void MyTrack3D(const Ntuple& nt,Int_t PdgCode ,const double zmin,const double zmax,const unsigned int color,const double Scale_xy,unsigned int verbose) // fname like /Users/hbu/mad/lhc/twiss_track_ref/002_px_0b1.tfs event display in canvas, did not manage to get this in OpenGl with Geometry --- better got to Eve, see below
{
bool goto_CM_units=true;
if(verbose) cout << __FILE__ << " " << __PRETTY_FUNCTION__ << " line " << __LINE__ << " start verbose=" << verbose << " nt.Noent()=" << nt.Noent() << " Scale_xy=" << Scale_xy << '\n';
if(gGeoManager==NULL)
{
cout << "No geometry defined to attach tracking" << '\n';
return;
}
unsigned int n=nt.Noent();
double xt[n],yt[n],zt[n],st[n];
valarray<double> xvec=nt.GetVar("X");
valarray<double> yvec=nt.GetVar("Y");
// valarray<double> zvec=nt.GetVar("Z");
valarray<double> svec=nt.GetVar("S");
for(unsigned int i=0; i<n; ++i) st[i]=svec[i];
for(unsigned int i=0; i<n; ++i) xt[i]=xvec[i];
for(unsigned int i=0; i<n; ++i) yt[i]=yvec[i];
for(unsigned int i=0; i<n; ++i) zt[i]=st[i]; // zvec[i]; // for the moment use s instead of z
if(goto_CM_units)
{
for(unsigned int i=0; i<n; ++i) xt[i]*=100;
for(unsigned int i=0; i<n; ++i) yt[i]*=100;
for(unsigned int i=0; i<n; ++i) zt[i]*=100;
}
if(verbose) cout << __FILE__ << " " << __PRETTY_FUNCTION__ << " line " << __LINE__ << '\n';
Int_t itrk=0;
TObject *particle=NULL;
Int_t iPrimary = gGeoManager->AddTrack(itrk,PdgCode,particle);
TVirtualGeoTrack *myTrack = gGeoManager->GetTrack(iPrimary); // keep link in class
for(unsigned int i=0; i<n; ++i)
{
if(zt[i]>zmax) break;
double tt=MyConstPhys::CLight*st[i];
if(verbose&&i<1000) cout << " i=" << setw(3) << i << " x=" << setw(12) << xt[i] << " y=" << setw(12) << yt[i] << " z=" << setw(10) << zt[i] << " tt=" << setw(10) << tt << '\n';
if(zt[i]>zmin) myTrack->AddPoint(xt[i],yt[i],zt[i],tt);
}
if(verbose) cout << __FILE__ << " " << __PRETTY_FUNCTION__ << " line " << __LINE__ << '\n';
myTrack->Print();
// myTrack->Draw(); // Draw("ogl")
gGeoManager->GetTopVolume()->SetVisRaytrace(true); // switches to more solid view --- more similar to OpenGL
if(verbose) cout << __FILE__ << " " << __PRETTY_FUNCTION__ << " line " << __LINE__ << '\n';
// gGeoManager->GetTopVolume()->Draw(); // shows geometry, but track not visible Draw("ogl")
cout << " gGeoManager->GetNtracks()=" << gGeoManager->GetNtracks() << '\n'; // fNtracks
// cout << " myTrack->GetNtracks()=" << myTrack->GetNtracks() << '\n'; // fNtracks
// gGeoManager->DrawTracks(); // shows track in c1 after click in window, also tried with "ogl" which has not effect here
if(verbose) cout << __FILE__ << " " << __PRETTY_FUNCTION__ << " line " << __LINE__ << '\n';
if (gROOT->GetListOfCanvases()->FindObject("c1")) cout << " UseGL()=" << ((TCanvas*)gROOT->GetListOfCanvases()->FindObject("c1"))->UseGL() << '\n'; // check if ogl on, still off
// shows track after click in canvas window -- track immediately visible when not calling gGeoManager->GetTopVolume()->Draw(); after myTrack->Draw();
// gGeoManager->DrawTracks(); // shows track in c1
// myTrack->Clear();
// myTrack->Draw(); // track visible in 2 dim only
}