Import Geant4 0.1.0 source tree
This commit is contained in:
Gabriele Cosmo
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-47
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G3toG4
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------
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The Geant4 facility to convert Geant3 to GEant4 volumes.
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See the documentation section of the repository for more information.
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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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19-Mar-1997:
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'gmake' issued from the test/ subdirectory will create an executable
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'clGeometry' which reads the call list file generated by rztog4, builds a
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geometry and calls the visualization package. This has been tested with the
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visualization based on OpenGL and Mesa (freeware OpenGL).
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To use the visualization, you need to set one or more of the following
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environment variables:
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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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setenv G4VIS_USE_DAWN
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setenv G4VIS_USE_OPACS
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setenv G4VIS_USE_OPENGL
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setenv G4VIS_USE_OPENGLX
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setenv G4VIS_USE_OPENGLXM
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setenv G4VIS_USE_OPENINVENTOR
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setenv G4VIS_USE_RAYX
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setenv G4VIS_USE_VRML1
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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 following gmake invocations do the following
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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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gmake libF : build libG3toG4F.a (rztog4 object archive)
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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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gmake libC : build libG3toG4.a (code to parse call list file and call G4
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routines)
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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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gmake lib : libC and libF targets
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setenv G4VIS_BUILD_<driver>_DRIVER
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setenv G4VIS_USE_<driver>
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gmake bin : build rztog4 executable
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where the G4-supported drivers are listed in $(G4BASE)/visualization/README.
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gmake : build lib targets
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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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gmake ext : build external packages, including BREPS and STEP
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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 examples: build cltog4 and clGeometry executables
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gmake global
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gmake cltog4: build cltog4 executable
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To compile and build the G3toG4 libraries, simply type
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gmake clGeometry: build clGeometry executable
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gmake
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gmake all : ext lib bin examples
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from the top-level G3toG4 directory.
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The code in the visualization subdirectory OpenGL/ must be compiled on a
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machine on which the OpenGL header files have been installed. The compilation
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of G3toG4 and external packages is done as follows:
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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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In the global/GNUmakefile.architecture file, you need to specify where to
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find the OpenGL libraries. I currently use the freeware version of OpenGL
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called 'Mesa'. I specify
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To remove all G3toG4 libraries, executables and .d files, simply type
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OGLLIBS := -L$(OGLHOME)/lib -lMesaGL -lMesaGLU -lMesaaux -lMesatk
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gmake clean
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The AIX version is
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OGLLIBS := -L$(OGLHOME)/lib -lGLX -lGLU -lGL -lXGLW -lglobalm5
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Notes on the implementation (Sep 24 '96)
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the implementation (April '99)
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----------------------------------------
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- PGON, PCON still not in; awaiting Geant4 constructors. 100m^3
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boxes are generated for PGON, PCON at present.
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- MANY not available in Geant4 yet.
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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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@@ -76,7 +78,5 @@ Notes on the implementation (Sep 24 '96)
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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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- Use of G4UserLimits has to be reviewed and turned on.
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- GNUmakefile is tested only on HP
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See History file for modificartion history.
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See History file for modification history.
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