Gabriele Cosmo
53 lines
1.8 KiB
Markdown
53 lines
1.8 KiB
Markdown
\page ExampleG01 Example G01
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## GDML READ/WRITE
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This example demonstrates the usage of the GDML reader and writer. It allows
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to export geometry descriptions in an application independent format (GDML,
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Geometry Description Markup Language).
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The GDML files can be then used to interchange geometries between different
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applications and users.
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The detector construction consists of a call to GDMLProcessor which parses a
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GDML file and returns the pointer to the world volume. The user can also write
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her/his own GDML file and use it as the primary input format for her/his Geant4
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application.
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Several simple GDML files are provided:
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- axes.gdml, showing loading and orientation of Cartesian axes;
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- solids.gdml, list of all supported solids with placement;
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- scale.gdml, a simple diamond structure made of extruded solids;
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- divisionvol.gdml, a divided box;
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- parameterized.gdml, a parameterised box;
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- pTube.gdml, a parameterised tube;
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- auxiliary.gdml, showing association of volume with auxiliary information;
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- etc...
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## HOW TO BUILD THE EXAMPLE ?
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- You need to have built the persistency/gdml module by having
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set the `-DGEANT4_USE_GDML=ON` flag during the CMAKE configuration step,
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as well as the `-DXERCESC_ROOT_DIR=path_to_xercesc` flag pointing to
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the path where the XercesC XML parser package is installed in your system.
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- Compile and link to generate the executable (in your CMAKE build directory):
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```
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make
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```
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- Execute the application.
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- For reading and visualize interactively a GDML file:
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```
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./load_gdml [GDML-file-in].gdml
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```
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- For reading, writing and visualize interactively a GDML file:
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```
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./load_gdml [GDML-file-in].gdml [GDML-file-out].gdml
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```
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- For reading, writing a GDML file and running in batch a macro:
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```
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./load_gdml [GDML-file-in].gdml [GDML-file-out].gdml [macro].in
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``` |