Gabriele Cosmo
81 lines
3.1 KiB
Plaintext
81 lines
3.1 KiB
Plaintext
-------------------------------------------------------------------
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=========================================================
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Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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=========================================================
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How to build and run an example
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-------------------------------
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All basic and most of extended examples have a similar structure.
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The main () function is included in exampleXYZ.cc in the example top directory
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and the example source code is structered in include and src subdirectories.
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When the example is built, the executable takes the same name as the file with
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main() function without .cc extension, exampleXYZ.
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Then several macros are provided to run the example with various start-up
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conditions. These macros have usually .mac extension. Besides these macros,
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there is often a macro exampleXYZ.in (note its different extension)
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which is used in Geant4 testing and which output, exampleXYZ.out, can also included
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in the distribution.
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You can find all details about building the examples in the Geant4 Installation Guide:
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"https://geant4-userdoc.web.cern.ch/UsersGuides/InstallationGuide/html/index.html"
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in the section How to Use the Geant4 Toolkit Libraries:
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https://geant4-userdoc.web.cern.ch/UsersGuides/InstallationGuide/html/buildtools.html"
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Here we recall only the basics.
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1) COMPILE AND LINK TO GENERATE AN EXECUTABLE
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% cd path_to_exampleXYZ # go to directory which contains your example
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% mkdir exampleXYZ_build
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% cd exampleXYZ_build
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% cmake -DGeant4_DIR=path_to_Geant4_installation/lib[64]/Geant4-11.0.0/ ../exampleXYZ
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% make -j N exampleXYZ # "N" is the number of processes
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% make install # this step is optional
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2) EXECUTE EXAMPLEXYZ IN 'BATCH' MODE FROM MACRO FILES
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... go to the directory where the example was built/installed
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% ./exampleXYZ xyz.mac
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3) EXECUTE EXAMPLEXYZ IN 'INTERACTIVE MODE' WITH VISUALIZATION
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... go to the directory where the example was built/installed
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% ./exampleXYZ
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....
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Idle> type your commands
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....
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Idle> exit
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Below we give the explicit instructions for the example
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extended/electromagnetic/TestEm1.
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Let's suppose that the TestEm1 directory is available in $HOME and Geant4
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installation in /usr/local and we work within bash shell on a 64-bit machine.
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1) COMPILE AND LINK TESTEM1 TO GENERATE AN EXECUTABLE
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% cd $HOME
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% mkdir TestEm1_build
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% cd TestEm1_build
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% cmake -DGeant4_DIR=/usr/local/lib64/Geant4-11.0.0/ ../TestEm1
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% make -j 2 TestEm1
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2) EXECUTE TESTEM1 IN 'BATCH' MODE FROM MACRO FILES
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% cd $HOME/TestEm1_build # or cd $HOME/TestEm1 if example was built with GNUmake
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% ./TestEm1 annihil.mac
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% ./TestEm1 brem.mac
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% ./TestEm1 TestEm1.in >& myTestEm1.out # redirecting output in a file
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3) EXECUTE TESTEM1 IN 'INTERACTIVE MODE' WITH VISUALIZATION
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% cd $HOME/TestEm1_build # or cd $HOME/TestEm1 if example was built with GNUmake
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% ./TestEm1
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PreInit> /run/initialize
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Idle> /run/beamOn 1
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...
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Idle> exit
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