| 1 | <!-- ******************************************************** -->
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| 2 | <!-- -->
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| 3 | <!-- [History] -->
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| 4 | <!-- 1st version created: Katsuya Amako, Dec-2006 -->
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| 5 | <!-- -->
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| 6 | <!-- ******************************************************** -->
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| 7 |
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| 8 |
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| 9 | <!-- ********************* QandA Section ******************** -->
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| 10 | <section id="qanda.Vis">
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| 11 | <title>
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| 12 | Visualization
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| 13 | </title>
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| 14 |
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| 15 | <qandaset defaultlabel="qanda">
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| 16 |
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| 17 |
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| 18 | <!-- ******* QandA Entry ******** -->
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| 19 | <qandaentry id="qanda.Vis.NoVisAppr">
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| 20 |
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| 21 | <question><para>
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| 22 | I have set G4VIS... environmental variables but visualization does not
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| 23 | appear to be enabled.
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| 24 | </para></question>
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| 25 |
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| 26 | <answer><para>
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| 27 | This might be because you set the environment variables *after* already
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| 28 | compiling. The environment variables control C-pre-processor macros of
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| 29 | the same name and therefore influence what code gets compiled. It is
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| 30 | suggested to proceed with the following manual procedure to correct the
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| 31 | current installation:
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| 32 |
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| 33 | <itemizedlist spacing="compact">
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| 34 | <listitem><para>
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| 35 | Configure the environment according to the installation making sure
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| 36 | to -unset- the <literal>G4WORKDIR</literal> environment variable,
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| 37 | if set.
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| 38 | </para></listitem>
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| 39 | <listitem><para>
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| 40 | Verify and eventually set the environment variables of the
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| 41 | visualization module [name] concerned (setenv or export both
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| 42 | <literal>G4VIS_BUILD_[name]_DRIVER</literal> and
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| 43 | <literal>G4VIS_USE_[name]</literal> variables according to the UNIX
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| 44 | shell used), and then proceed as follows:
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| 45 |
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| 46 | <informalexample><programlisting>
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| 47 | cd $G4INSTALL/source/visualization
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| 48 | gmake clean
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| 49 | gmake
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| 50 | cd $G4INSTALL/source/interfaces
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| 51 | gmake clean
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| 52 | gmake
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| 53 | cd $G4INSTALL/source
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| 54 | gmake libmap
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| 55 | setenv G4WORKDIR [your working directory] (or export)
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| 56 | cd [your application directory]
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| 57 | gmake clean
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| 58 | gmake
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| 59 | </programlisting></informalexample>
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| 60 | </para></listitem>
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| 61 | </itemizedlist>
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| 62 |
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| 63 | </para></answer>
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| 64 |
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| 65 | </qandaentry>
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| 66 |
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| 67 |
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| 68 | <!-- ******* QandA Entry ******** -->
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| 69 | <qandaentry id="qanda.Vis.BooleanProc">
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| 70 |
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| 71 | <question><para>
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| 72 | While visualizing my geometry setup I often see the following error
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| 73 | message printed out:
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| 74 |
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| 75 | <informalexample><programlisting>
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| 76 | BooleanProcessor: boolean operation failed .
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| 77 | </programlisting></informalexample>
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| 78 | </para></question>
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| 79 |
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| 80 | <answer><para>
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| 81 | There is a known limitation for the visualization of Boolean solids
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| 82 | in the so-called BooleanProcessor which is used to make polyhedra
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| 83 | for visualisation. It does not affect the tracking which is done
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| 84 | through such solids. So the error message you see does not affect
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| 85 | the simulation in any way. The workaround is to move one of the
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| 86 | affected solids by a small distance in order to avoid shared surfaces.
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| 87 | </para></answer>
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| 88 |
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| 89 | </qandaentry>
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| 90 |
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| 91 |
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| 92 | </qandaset>
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| 93 | </section>
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