class TVirtualMCGeometry: public TNamed

 Destructor

 detector composition


 Define a material
 kmat   number assigned to the material
 name   material name
 a      atomic mass in au
 z      atomic number
 dens   density in g/cm3
 absl   absorption length in cm;
               if >=0 it is ignored and the program
               calculates it, if <0. -absl is taken
 radl   radiation length in cm
               if >=0 it is ignored and the program
               calculates it, if <0. -radl is taken
 buf    pointer to an array of user words
 nwbuf  number of user words

 Define mixture or compound
 with a number kmat composed by the basic nlmat materials defined
 by arrays a, z and wmat

 If nlmat > 0 then wmat contains the proportion by
 weights of each basic material in the mixture.

 If nlmat < 0 then wmat contains the number of atoms
 of a given kind into the molecule of the compound.
 In this case, wmat in output is changed to relative
 weights.

 Define a medium.
 kmed      tracking medium number assigned
 name      tracking medium name
 nmat      material number
 isvol     sensitive volume flag
 ifield    magnetic field:
                  - ifield = 0 if no magnetic field;
                  - ifield = -1 if user decision in guswim;
                  - ifield = 1 if tracking performed with g3rkuta;
                  - ifield = 2 if tracking
 fieldm    max. field value (kilogauss)
 tmaxfd    max. angle due to field (deg/step)
 stemax    max. step allowed
 deemax    max. fraction of energy lost in a step
 epsil     tracking precision (cm)
 stmin     min. step due to continuous processes (cm)
 ubuf      pointer to an array of user words
 nbuf      number of user words
  performed with g3helix; ifield = 3 if tracking performed with g3helx3.

 Define a rotation matrix
 krot     rotation matrix number assigned
 thetaX   polar angle for axis X
 phiX     azimuthal angle for axis X
 thetaY   polar angle for axis Y
 phiY     azimuthal angle for axis Y
 thetaZ   polar angle for axis Z
 phiZ     azimuthal angle for axis Z

 The same as previous but in double precision

 Create a new volume by dividing an existing one.
 Divide mother into ndiv divisions called name
 along axis iaxis starting at coordinate value c0i.
 The new volume created will be medium number numed.

 Create a new volume by dividing an existing one
 Divides mother into divisions called name along
 axis iaxis starting at coordinate value c0 with step
 size step.
 The new volume created will have medium number numed.
 If numed is 0, numed of mother is taken.
 ndvmx is the expected maximum number of divisions
 (If 0, no protection tests are performed in Geant3)

 Position a volume into an existing one.
 It positions a previously defined volume in the mother.
   name   Volume name
   nr     Copy number of the volume
   mother Mother volume name
   x      X coord. of the volume in mother ref. sys.
   y      Y coord. of the volume in mother ref. sys.
   z      Z coord. of the volume in mother ref. sys.
   irot   Rotation matrix number w.r.t. mother ref. sys.
   konly  ONLY/MANY flag

 The same as previous but in double precision

 functions for access to geometry


 Return the transformation matrix between the volume specified by
 the path volumePath and the top or master volume.

 Return the material parameters for the volume specified by
 the volumeName.

 functions for drawing
virtual void  DrawOneSpec(const char* name) = 0;
virtual void  Gsatt(const char* name, const char* att, Int_t val) = 0;
virtual void  Gdraw(const char*,Double_t theta = 30, Double_t phi = 30,
                    Double_t psi = 0, Double_t u0 = 10, Double_t v0 = 10,
                    Double_t ul = 0.01, Double_t vl = 0.01) = 0;
 Euclid
 virtual void  WriteEuclid(const char*, const char*, Int_t, Int_t) = 0;

 get methods


 Return the unique numeric identifier for volume name volName

 Return the volume name for a given volume identifier id

 Return the unique numeric identifier for medium name mediumName

 Return total number of volumes in the geometry

 Return number of daughters of the volume specified by volName

 Return the name of i-th daughter of the volume specified by volName

 Return the copyNo of i-th daughter of the volume specified by volName

 Return material number for a given volume id