Hi Christian, No, TNode/TGeometry do not provide the equivalent of the Geant3 geometry package. I am well aware that we have many requests to provide a coherent geometry system. We are currently exploring several directions. In the framework of the ALICE experiment, we have developed the AliRoot system that includes a set of classes such as TGeant3 and TGeant4 that provide a full interface to the Geant3 and Geant4 simuation systems. Rene Brun On Tue, 16 Jan 2001, Christian Holm Christensen wrote: > Hi ROOT'ers, > > Given a TGeometry and three spatial cordinates (x,y,z), is > there anyway to determind in which TNode that point is inside? > (a la GEANT's GMEDIA) > > And given a TNode and spatial coordinates, is it possible to find the > distance to the closest edge of that TNode? > > Also given a TNode, spatial coordinates and a direction (vx, vy, vz) > is it possible to find the distance to the next node boundary? > (a la GEANT's GNEXT) > > Have I just overlooked something? Or isn't there? If it isn't I'd like > to suggest having something like: > > TNode* TGeometry::FindNode(Double_t x, Double_t y, Double_t z); > Double_t TNode::DistanceToEdge(Double_t x, Double_t y, Double_t z); > Double_t TNode::DistanceToEdge(Double_t x, Double_t y, Double_t z, > Double_t vx, Double_t vy, Double_t vz); > > > Am I rigth in believing that g2root doens't support devisions of > volumes? And will the TNodeDiv class be implemented? > > Also, has any one tried to have a GEANT geometry in a MySQL database > and use the same database for offline analysis in ROOT? If so, I'd > like to see how you did it. > > Thanks. > > Yours, > > Christian ----------------------------------------------------------- > Holm Christensen Phone: (+45) 35 35 96 91 > Sankt Hansgade 23, 1. th. Office: (+45) 353 25 305 > DK-2200 Copenhagen N Web: www.nbi.dk/~cholm > Denmark Email: cholm@nbi.dk >
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