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0001 \page ExampleG03 Example G03
0002
0003 ## EXAMPLE OF DEFINITION OF A GDML EXTENSION WITH ASSOCIATED READER AND WRITER
0004
0005
0006 In this directory you can find an example showing how to extend the GDML
0007 schema and plug-in a custom reader and writer to the system for handling
0008 the extension.
0009 For more information, please, refer to the GDML Documentation.
0010
0011 The Geometry is a Simple Box to which it is assigned a color as
0012 visualization attribute.
0013 The entity "color" is defined as part of the "extension" tag and properly
0014 implemented in the GDML schema extension placed inside the directory
0015 SimpleExtensionSchema.
0016 The GDML file implenting the geometry with colors extension is
0017 color_extension.gdml, in which the standard "gdml" tag has been replaced
0018 by the "gdml_simple_extension" tag, with relative location for the new schema.
0019 The GDML file is automatically loaded by the program.
0020 It is also possible to use UI commands or macros as arguments to read any
0021 standard GDML file.
0022
0023 ## HOW TO BUILD THE EXAMPLE ?
0024
0025 - You need to have built the persistency/gdml module by having
0026 set the `-DGEANT4_USE_GDML=ON` flag during the CMAKE configuration step,
0027 as well as the `-DXERCESC_ROOT_DIR=path_to_xercesc` flag pointing to
0028 the path where the XercesC XML parser package is installed in your system.
0029
0030 - Compile and link to generate the executable (in your CMAKE build directory):
0031 ```
0032 % make
0033 ```
0034
0035 - Execute the application for reading and visualizing the setup:
0036 ```
0037 % ./gdml_ext read_ext.mac
0038 ```
0039
0040 - Execute the application for also writing the setup:
0041 ```
0042 % ./gdml_ext [write_ext.mac]
0043 ```
