RE: TVector3 3D array

From: Philippe Canal <pcanal_at_fnal.gov>
Date: Fri, 22 Apr 2005 13:27:42 -0500

Hi,

The easiest way would be to use

        vector<vector<vector<TVector3> > > CellGridV;

If you can't use this then you have to use TVector3 ***CellGridV and initiliaze it with something like:

   CellGridV = new TVector3**[left_dim]
   for(int i=0; i<left_dim; ++i) {

      CellGridV[i] = new TVector*[middle_dim];
      for(int j=0; j<left_dim; ++j) {
         CellGridV[i][j] = new TVector[rigthdim];
         for(int k=0; k<left_dim; ++k) {
           do something with CellGridV[i][j][k];
         }
      }

   }
or use TVector3 *CellGridV = new TVector3[left_dim*middle_dim*right_dim]; and access CellGridV using an arithmetic expression involve i,j,k,left_dim,middle_dim and right_dim.

Philippe.

-----Original Message-----
From: owner-roottalk_at_pcroot.cern.ch [mailto:owner-roottalk_at_pcroot.cern.ch] On Behalf Of doxaras_at_inp.demokritos.gr
Sent: Thursday, April 21, 2005 4:17 AM
To: brun_at_pcbrun.cern.ch; roottalk_at_pcroot.cern.ch Subject: [ROOT] TVector3 3D array

Hi all,
I am experiencing a problem trying to construct a cubic cellular grid and assign a TVector3 object at every grid point for a MHD simulation. After including <TVector3.h> and loading libphysics.so, I have tried all declarations (dynamic or not) without success TVector3 CellGridV[][][] and
TVector ***CellGridV = new TVector3[][][]. I cannot send the simplest possible solution right now since I am addressing thought a public computer.
best regards,
Giannis.

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\ Doxaras Ioannis                               /

\ University of Athens                          /

\ Division of Nuclear and Particle Physics      /

\ NCSR "Demokritos"                             /

\ Institute of Nuclear Physics                  /

\ phone: +30 210-7798198                        /

\ doxaras_at_gmail.gr                              /

\ doxaras_at_inp.demokritos.gr                     /

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"Institute of Nuclear Physics NCSR Demokritos"  http://www.inp.demokritos.gr/ Received on Fri Apr 22 2005 - 20:27:27 MEST