Gabriele Cosmo
83 lines
2.8 KiB
Plaintext
83 lines
2.8 KiB
Plaintext
G3toG4
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G3toG4 is the Geant4 facility to convert Geant3 geometries into Geant4.
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This is done in two stages.
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First, the user supplies a Geant3 .rz file containing the initialization
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data structures. An executable, rztog4, reads this file and produces an
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ascii ("call list") file containing instructions on how to build the
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geometry. The source code for this is fortran.
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Second, a call list interpreter (G4BuildGeom.cc) reads these instructions
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and builds the geometry in the user's G4 client code. Two examples of how
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to use the call list interpreter are supplied in g3tog4/examples.
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The first example, cltog4, is a simple example which simply invokes the
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call list interpreter method G4BuildGeom from G3toG4DetectorConstruction
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class, builds the geometry and exits.
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The second example, clGeometry, is more complete and is patterned after
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the novice G4 examples. It also invokes the call list interpreter, but in
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addition, allows the geometry to be visualized and particles to be
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tracked. Currently, G3toG4 does not provide a method for scoring hits in
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G4.
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To build these examples, especially the one involving visualization, the
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user must have one or more of the following environment variables set:
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setenv G4VIS_BUILD_<driver>_DRIVER
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setenv G4VIS_USE_<driver>
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where the G4-supported drivers are listed in $(G4BASE)/visualization/README.
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To use the freeware Mesa API, you must have the environment variable
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OGLHOME defined to point to the directory containing the Mesa lib/ directory
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specific to your platform.
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Then the user must build the global Geant4 libraries by issuing the
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following command from the geant4/source directory:
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gmake global
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To compile and build the G3toG4 libraries, simply type
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gmake
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from the top-level G3toG4 directory.
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To build the converter executable "rztog4", simply type
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gmake bin
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To build the example executables, simply type:
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gmake examples
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To make everything, simply type:
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gmake all
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To remove all G3toG4 libraries, executables and .d files, simply type
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gmake clean
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the implementation (April '99)
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----------------------------------------
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- PGON, PCON are built using the CSG classes G4Polycone and G4Polyhedra.
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- G3 MANY feature has not been tested.
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- GsROTM is fully implemented and supports rotations and mirror reflections
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- GSPOSP implemented via individual logical volumes for each instantiation
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(G4PVIndexed doesn't exist yet)
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- GSDV* routines for dividing volumes implemented, using
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G4PVReplicas, G4PVParametrised
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- GSROTM is implemented
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- hits are not implemented. Hit code is do-nothing. (It is
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coded up, but hit class references are commented out.)
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The digits+hits code has to be updated before G3toG4's
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hit code can be activated.
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- GSPART has to be updated.
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- Usage of magnetic field class has to be turned on.
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See History file for modification history.
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