[904] | 1 | <!-- ******************************************************** --> |
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| 2 | <!-- --> |
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| 3 | <!-- [History] --> |
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| 4 | <!-- Changed by: Katsuya Amako, 15-Jul-2000 --> |
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| 5 | <!-- Changed by: Dennis Wright, 27-Nov-2001 --> |
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| 6 | <!-- Proof read by: Joe Chuma, 5-Jul-1999 --> |
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| 7 | <!-- Converted to DocBook: Katsuya Amako, Aug-2006 --> |
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[921] | 8 | <!-- Added Qt Info: Laurent Garnier, Dec-2008 --> |
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| 9 | <!-- Updates for Qt and HepRApp: Joseph Perl, Dec-2008 --> |
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[1211] | 10 | <!-- Typo correction : Laurent Garnier, Dec-2009 --> |
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[904] | 11 | <!-- --> |
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| 12 | <!-- ******************************************************** --> |
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| 13 | |
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| 14 | |
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| 15 | <!-- ******************* Section (Level#1) ****************** --> |
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| 16 | <sect1 id="sect.VisIntro"> |
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| 17 | <title> |
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| 18 | Introduction to Visualization |
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| 19 | </title> |
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| 20 | |
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| 21 | <para> |
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| 22 | The Geant4 visualization system was developed in response to a |
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| 23 | diverse set of requirements: |
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| 24 | |
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| 25 | <orderedlist spacing="compact"> |
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| 26 | <listitem><para> |
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| 27 | Quick response to study geometries, trajectories and hits |
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| 28 | </para></listitem> |
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| 29 | <listitem><para> |
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| 30 | High-quality output for publications |
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| 31 | </para></listitem> |
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| 32 | <listitem><para> |
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| 33 | Flexible camera control to debug complex geometries |
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| 34 | </para></listitem> |
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| 35 | <listitem><para> |
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| 36 | Tools to show volume overlap errors in detector geometries |
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| 37 | </para></listitem> |
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| 38 | <listitem><para> |
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| 39 | Interactive picking to get more information on visualized objects |
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| 40 | </para></listitem> |
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| 41 | </orderedlist> |
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| 42 | </para> |
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| 43 | |
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| 44 | <para> |
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| 45 | No one graphics system is ideal for all of these requirements, |
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| 46 | and many of the large software frameworks into which Geant4 has |
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| 47 | been incorporated already have their own visualization systems, so |
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| 48 | Geant4 visualization was designed around an abstract interface that |
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| 49 | supports a diverse family of graphics systems. Some of these |
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| 50 | graphics systems use a graphics library compiled with Geant4, such |
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[905] | 51 | as OpenGL, Qt, while others involve a separate application, such as |
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[921] | 52 | HepRApp or DAWN. |
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[904] | 53 | </para> |
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| 54 | |
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| 55 | <!-- ******************* Section (Level#2) ****************** --> |
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| 56 | <sect2 id="sect.VisIntro.What"> |
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| 57 | <title> |
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| 58 | What Can be Visualized |
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| 59 | </title> |
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| 60 | |
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| 61 | <para> |
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| 62 | Simulation data can be visualized: |
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| 63 | |
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| 64 | <itemizedlist spacing="compact"> |
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| 65 | <listitem><para> |
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| 66 | Detector components |
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| 67 | <itemizedlist spacing="compact"> |
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| 68 | <listitem><para> |
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| 69 | A hierarchical structure of physical volumes |
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| 70 | </para></listitem> |
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| 71 | <listitem><para> |
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| 72 | A piece of physical volume, logical volume, and solid |
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| 73 | </para></listitem> |
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| 74 | </itemizedlist> |
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| 75 | </para></listitem> |
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| 76 | <listitem><para> |
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| 77 | Particle trajectories and tracking steps |
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| 78 | </para></listitem> |
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| 79 | <listitem><para> |
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| 80 | Hits of particles in detector components |
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| 81 | </para></listitem> |
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| 82 | </itemizedlist> |
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| 83 | </para> |
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| 84 | |
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| 85 | <para> |
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| 86 | Other user defined objects can be visualized: |
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| 87 | |
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| 88 | <itemizedlist spacing="compact"> |
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| 89 | <listitem><para> |
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| 90 | Polylines, such as coordinate axes |
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| 91 | </para></listitem> |
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| 92 | <listitem><para> |
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| 93 | 3D Markers, such as eye guides |
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| 94 | </para></listitem> |
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| 95 | <listitem><para> |
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| 96 | Text, descriptive character strings, comments or titles |
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| 97 | </para></listitem> |
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| 98 | <listitem><para> |
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| 99 | Scales |
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| 100 | </para></listitem> |
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| 101 | <listitem><para> |
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| 102 | Logos |
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| 103 | </para></listitem> |
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| 104 | </itemizedlist> |
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| 105 | </para> |
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| 106 | |
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| 107 | </sect2> |
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| 108 | |
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| 109 | |
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| 110 | <!-- ******************* Section (Level#2) ****************** --> |
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| 111 | <sect2 id="sect.VisIntro.Choice"> |
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| 112 | <title> |
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| 113 | You have a Choice of Visualization Drivers |
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| 114 | </title> |
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| 115 | |
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| 116 | <para> |
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| 117 | The many graphics systems that Geant4 supports are complementary to |
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| 118 | each other. |
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| 119 | |
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| 120 | <itemizedlist spacing="compact"> |
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| 121 | <listitem><para> |
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| 122 | OpenGL |
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| 123 | <itemizedlist spacing="compact"> |
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| 124 | <listitem><para> |
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| 125 | View directly from Geant4 |
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| 126 | </para></listitem> |
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| 127 | <listitem><para> |
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[921] | 128 | Requires addition of GL libraries that are freely avialable for all operating systems (and pre-installed on many) |
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[904] | 129 | </para></listitem> |
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| 130 | <listitem><para> |
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| 131 | Rendered, photorealistic image with some interactive features |
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| 132 | </para></listitem> |
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| 133 | <listitem><para> |
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| 134 | zoom, rotate, translate |
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| 135 | </para></listitem> |
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| 136 | <listitem><para> |
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| 137 | Fast response (can usually exploit full potential of graphics |
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| 138 | hardware) |
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| 139 | </para></listitem> |
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| 140 | <listitem><para> |
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[921] | 141 | Print to EPS (vector and pixel graphics) |
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[904] | 142 | </para></listitem> |
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| 143 | </itemizedlist> |
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| 144 | </para></listitem> |
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| 145 | <listitem><para> |
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[905] | 146 | Qt |
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| 147 | <itemizedlist spacing="compact"> |
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| 148 | <listitem><para> |
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| 149 | View directly from Geant4 |
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| 150 | </para></listitem> |
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| 151 | <listitem><para> |
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[1211] | 152 | Requires addition of Qt and GL libraries that are freely available on most operating |
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[921] | 153 | systems |
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[905] | 154 | </para></listitem> |
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| 155 | <listitem><para> |
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| 156 | Rendered, photorealistic image |
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| 157 | </para></listitem> |
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| 158 | <listitem><para> |
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| 159 | Many interactive features |
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| 160 | </para></listitem> |
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| 161 | <listitem><para> |
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| 162 | zoom, rotate, translate |
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| 163 | </para></listitem> |
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| 164 | <listitem><para> |
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| 165 | Fast response (can usually exploit full potential of graphics |
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| 166 | hardware) |
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| 167 | </para></listitem> |
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| 168 | <listitem><para> |
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| 169 | Expanded printing ability (vector and pixel graphics) |
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| 170 | </para></listitem> |
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| 171 | <listitem><para> |
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[921] | 172 | Easy interface to make movies |
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[905] | 173 | </para></listitem> |
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| 174 | </itemizedlist> |
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| 175 | </para></listitem> |
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| 176 | <listitem><para> |
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[904] | 177 | OpenInventor |
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| 178 | <itemizedlist spacing="compact"> |
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| 179 | <listitem><para> |
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| 180 | View directly from Geant4 |
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| 181 | </para></listitem> |
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| 182 | <listitem><para> |
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| 183 | Requires addition of OpenInventor libraries (freely available |
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| 184 | for most Linux systems). |
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| 185 | </para></listitem> |
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| 186 | <listitem><para> |
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| 187 | Rendered, photorealistic image |
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| 188 | </para></listitem> |
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| 189 | <listitem><para> |
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| 190 | Many interactive features |
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| 191 | </para></listitem> |
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| 192 | <listitem><para> |
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| 193 | zoom, rotate, translate |
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| 194 | </para></listitem> |
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| 195 | <listitem><para> |
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| 196 | click to "see inside" opaque |
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| 197 | volumes |
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| 198 | </para></listitem> |
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| 199 | <listitem><para> |
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| 200 | Fast response (can usually exploit full potential of graphics |
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| 201 | hardware) |
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| 202 | </para></listitem> |
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| 203 | <listitem><para> |
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| 204 | Expanded printing ability (vector and pixel graphics) |
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| 205 | </para></listitem> |
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| 206 | </itemizedlist> |
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| 207 | </para></listitem> |
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| 208 | <listitem><para> |
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[921] | 209 | HepRep |
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[904] | 210 | <itemizedlist spacing="compact"> |
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| 211 | <listitem><para> |
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[921] | 212 | Create a file to view in a HepRep browser such as HepRApp, |
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| 213 | FRED or WIRED4 |
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[904] | 214 | </para></listitem> |
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| 215 | <listitem><para> |
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[921] | 216 | Requires a HepRep browser (above options work on any operating system) |
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[904] | 217 | </para></listitem> |
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| 218 | <listitem><para> |
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| 219 | Wireframe or simple area fills (not photorealistic) |
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| 220 | </para></listitem> |
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| 221 | <listitem><para> |
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| 222 | Many interactive features |
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| 223 | </para></listitem> |
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| 224 | <listitem><para> |
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| 225 | zoom, rotate, translate |
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| 226 | </para></listitem> |
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| 227 | <listitem><para> |
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| 228 | click to show attributes (momentum, etc.) |
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| 229 | </para></listitem> |
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| 230 | <listitem><para> |
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| 231 | special projections (FishEye, etc.) |
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| 232 | </para></listitem> |
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| 233 | <listitem><para> |
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| 234 | control visibility from hierarchical (tree) view of data |
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| 235 | </para></listitem> |
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| 236 | <listitem><para> |
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| 237 | Hierarchical view of the geometry |
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| 238 | </para></listitem> |
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| 239 | <listitem><para> |
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| 240 | Export to many vector graphic formats (PostScript, PDF, etc.) |
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| 241 | </para></listitem> |
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| 242 | </itemizedlist> |
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| 243 | </para></listitem> |
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| 244 | <listitem><para> |
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| 245 | DAWN |
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| 246 | <itemizedlist spacing="compact"> |
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| 247 | <listitem><para> |
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| 248 | Create a file to view in the DAWN Renderer |
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| 249 | </para></listitem> |
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| 250 | <listitem><para> |
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| 251 | Requires DAWN, available for all Linux and Windows systems. |
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| 252 | </para></listitem> |
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| 253 | <listitem><para> |
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| 254 | Rendered, photorealistic image |
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| 255 | </para></listitem> |
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| 256 | <listitem><para> |
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| 257 | No interactive features |
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| 258 | </para></listitem> |
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| 259 | <listitem><para> |
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| 260 | Highest quality technical rendering - output to vector PostScript |
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| 261 | </para></listitem> |
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| 262 | </itemizedlist> |
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| 263 | </para></listitem> |
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| 264 | <listitem><para> |
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| 265 | VRML |
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| 266 | <itemizedlist spacing="compact"> |
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| 267 | <listitem><para> |
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| 268 | Create a file to view in any VRML browser (some as web browser |
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| 269 | plug-ins). |
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| 270 | </para></listitem> |
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| 271 | <listitem><para> |
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| 272 | Requires VRML browser (many different choices for different |
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| 273 | operating systems). |
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| 274 | </para></listitem> |
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| 275 | <listitem><para> |
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| 276 | Rendered, photorealistic image with some interactive features |
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| 277 | </para></listitem> |
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| 278 | <listitem><para> |
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| 279 | zoom, rotate, translate |
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| 280 | </para></listitem> |
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| 281 | <listitem><para> |
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| 282 | Limited printing ability (pixel graphics, not vector graphics) |
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| 283 | </para></listitem> |
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| 284 | </itemizedlist> |
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| 285 | </para></listitem> |
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| 286 | <listitem><para> |
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| 287 | RayTracer |
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| 288 | <itemizedlist spacing="compact"> |
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| 289 | <listitem><para> |
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| 290 | Create a jpeg file |
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| 291 | </para></listitem> |
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| 292 | <listitem><para> |
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| 293 | Forms image by using Geant4's own tracking |
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| 294 | to follow photons through the detector |
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| 295 | </para></listitem> |
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| 296 | <listitem><para> |
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| 297 | Can show geometry but not trajectories |
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| 298 | </para></listitem> |
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| 299 | <listitem><para> |
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| 300 | Can render any geometry that Geant4 can handle (such as Boolean |
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| 301 | solids) |
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| 302 | </para></listitem> |
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| 303 | <listitem><para> |
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| 304 | Supports shadows, transparency and mirrored surfaces |
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| 305 | </para></listitem> |
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| 306 | </itemizedlist> |
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| 307 | </para></listitem> |
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| 308 | <listitem><para> |
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| 309 | ASCIITree |
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| 310 | <itemizedlist spacing="compact"> |
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| 311 | <listitem><para> |
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| 312 | Text dump of the geometry hierarchy |
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| 313 | </para></listitem> |
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| 314 | <listitem><para> |
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| 315 | Not graphical |
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| 316 | </para></listitem> |
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| 317 | <listitem><para> |
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| 318 | Control over level of detail to be dumped |
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| 319 | </para></listitem> |
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| 320 | <listitem><para> |
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| 321 | Can calculate mass and volume of any hierarchy of volumes |
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| 322 | </para></listitem> |
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| 323 | </itemizedlist> |
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| 324 | </para></listitem> |
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| 325 | </itemizedlist> |
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| 326 | </para> |
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| 327 | |
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| 328 | </sect2> |
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| 329 | |
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| 330 | |
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| 331 | <!-- ******************* Section (Level#2) ****************** --> |
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| 332 | <sect2 id="sect.VisIntro.ChoDrv"> |
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| 333 | <title> |
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| 334 | Choose the Driver that Meets Your Needs |
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| 335 | </title> |
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| 336 | |
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| 337 | <para> |
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| 338 | <itemizedlist spacing="compact"> |
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| 339 | <listitem><para> |
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| 340 | If you want very responsive photorealistic graphics (and have |
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| 341 | the OpenGL libraries installed) |
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| 342 | <itemizedlist spacing="compact"> |
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| 343 | <listitem><para> |
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| 344 | OpenGL is a good solution (if you have the Motif extensions, |
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| 345 | this also gives GUI control) |
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| 346 | </para></listitem> |
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| 347 | </itemizedlist> |
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| 348 | </para></listitem> |
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| 349 | <listitem><para> |
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| 350 | If you want very responsive photorealistic graphics plus more |
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[921] | 351 | interactivity (and have the OpenInventor or Qt libraries installed) |
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[904] | 352 | <itemizedlist spacing="compact"> |
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| 353 | <listitem><para> |
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[921] | 354 | OpenInventor or Qt are good solutions |
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[904] | 355 | </para></listitem> |
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| 356 | </itemizedlist> |
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| 357 | </para></listitem> |
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| 358 | <listitem><para> |
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[905] | 359 | If you want GUI control, very responsive photorealistic graphics plus more |
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| 360 | interactivity (and have the Qt libraries installed). |
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| 361 | <itemizedlist spacing="compact"> |
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| 362 | <listitem><para> |
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| 363 | Qt is a good solution |
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| 364 | </para></listitem> |
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| 365 | </itemizedlist> |
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| 366 | </para></listitem> |
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| 367 | <listitem><para> |
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[904] | 368 | If you want GUI control, want to be able to pick on items to |
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| 369 | inquire about them (identity, momentum, etc.), perhaps want to |
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| 370 | render to vector formats, and a wireframe look will do |
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| 371 | <itemizedlist spacing="compact"> |
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| 372 | <listitem><para> |
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[921] | 373 | HepRep will meet your needs |
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[904] | 374 | </para></listitem> |
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| 375 | </itemizedlist> |
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| 376 | </para></listitem> |
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| 377 | <listitem><para> |
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| 378 | If you want to render highest quality photorealistic images for |
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| 379 | use in a poster or a technical design report, and you can live |
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| 380 | without quick rotate and zoom |
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| 381 | <itemizedlist spacing="compact"> |
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| 382 | <listitem><para> |
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| 383 | DAWN is the way to go |
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| 384 | </para></listitem> |
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| 385 | </itemizedlist> |
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| 386 | </para></listitem> |
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| 387 | <listitem><para> |
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| 388 | If you want to render to a 3D format that others can view in a |
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| 389 | variety of commodity browsers (including some web browser plug-ins) |
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| 390 | <itemizedlist spacing="compact"> |
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| 391 | <listitem><para> |
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| 392 | VRML is the way to go |
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| 393 | </para></listitem> |
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| 394 | </itemizedlist> |
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| 395 | </para></listitem> |
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| 396 | </itemizedlist> |
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| 397 | |
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| 398 | <?soft-pagebreak ?> |
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| 399 | <itemizedlist spacing="compact"> |
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| 400 | <listitem><para> |
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| 401 | If you want to visualize a geometry that the other |
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| 402 | visualization drivers can't handle, or you need |
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| 403 | transparency or mirrors, and you don't need to |
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| 404 | visualize trajectories |
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| 405 | <itemizedlist spacing="compact"> |
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| 406 | <listitem><para> |
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| 407 | RayTracer will do it |
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| 408 | </para></listitem> |
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| 409 | </itemizedlist> |
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| 410 | </para></listitem> |
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| 411 | <listitem><para> |
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| 412 | If you just want to quickly check the geometry hierarchy, or if |
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| 413 | you want to calculate the volume or mass of any geometry hierarchy |
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| 414 | <itemizedlist spacing="compact"> |
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| 415 | <listitem><para> |
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| 416 | ASCIITree will meet your needs |
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| 417 | </para></listitem> |
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| 418 | </itemizedlist> |
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| 419 | </para></listitem> |
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| 420 | <listitem><para> |
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| 421 | You can also add your own visualization driver. |
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| 422 | <itemizedlist spacing="compact"> |
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| 423 | <listitem><para> |
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| 424 | Geant4's visualization system is modular. By |
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| 425 | creating just three new classes, you can direct Geant4 information |
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| 426 | to your own visualization system. |
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| 427 | </para></listitem> |
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| 428 | </itemizedlist> |
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| 429 | </para></listitem> |
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| 430 | </itemizedlist> |
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| 431 | </para> |
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| 432 | |
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| 433 | </sect2> |
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| 434 | |
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| 435 | <!-- ******************* Section (Level#2) ****************** --> |
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| 436 | <sect2 id="sect.VisIntro.CntVis"> |
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| 437 | <title> |
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| 438 | Controlling Visualization |
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| 439 | </title> |
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| 440 | |
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| 441 | <para> |
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| 442 | Your Geant4 code stays basically the same no matter which driver |
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| 443 | you use. |
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| 444 | </para> |
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| 445 | |
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| 446 | <para> |
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| 447 | Visualization is performed either with commands or from C++ code. |
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| 448 | |
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| 449 | <itemizedlist spacing="compact"> |
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| 450 | <listitem><para> |
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| 451 | Some visualization drivers work directly from Geant4 |
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| 452 | <itemizedlist spacing="compact"> |
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| 453 | <listitem><para> |
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| 454 | OpenGL |
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| 455 | </para></listitem> |
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| 456 | <listitem><para> |
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[905] | 457 | Qt |
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| 458 | </para></listitem> |
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| 459 | <listitem><para> |
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[904] | 460 | OpenInventor |
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| 461 | </para></listitem> |
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| 462 | <listitem><para> |
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| 463 | RayTracer |
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| 464 | </para></listitem> |
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| 465 | <listitem><para> |
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| 466 | ASCIITree |
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| 467 | </para></listitem> |
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| 468 | </itemizedlist> |
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| 469 | </para></listitem> |
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| 470 | <listitem><para> |
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| 471 | For other visualization drivers, you first have Geant4 produce |
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| 472 | a file, and then you have that file rendered by another application |
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| 473 | (which may have GUI control) |
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| 474 | <itemizedlist spacing="compact"> |
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| 475 | <listitem><para> |
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[921] | 476 | HepRep |
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[904] | 477 | </para></listitem> |
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| 478 | <listitem><para> |
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| 479 | DAWN |
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| 480 | </para></listitem> |
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| 481 | <listitem><para> |
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| 482 | VRML |
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| 483 | </para></listitem> |
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| 484 | </itemizedlist> |
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| 485 | </para></listitem> |
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| 486 | </itemizedlist> |
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| 487 | </para> |
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| 488 | |
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| 489 | </sect2> |
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| 490 | |
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| 491 | |
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| 492 | <!-- ******************* Section (Level#2) ****************** --> |
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| 493 | <sect2 id="sect.VisIntro.Details"> |
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| 494 | <title> |
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| 495 | Visualization Details |
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| 496 | </title> |
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| 497 | |
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| 498 | <para> |
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| 499 | The following sections of this guide cover the details of Geant4 |
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| 500 | visualization: |
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| 501 | |
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| 502 | <itemizedlist spacing="compact"> |
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| 503 | <listitem><para> |
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| 504 | <xref linkend="sect.VisAddExe" /> |
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| 505 | Adding Visualization to Your Executable |
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| 506 | </para></listitem> |
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| 507 | <listitem><para> |
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| 508 | <xref linkend="sect.VisDrv" /> |
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| 509 | The Visualization Drivers |
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| 510 | </para></listitem> |
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| 511 | <listitem><para> |
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| 512 | <xref linkend="sect.VisCntCmmd" /> |
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| 513 | Controlling Visualization from Commands |
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| 514 | </para></listitem> |
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| 515 | <listitem><para> |
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| 516 | <xref linkend="sect.VisCntCmpl" /> |
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| 517 | Controlling Visualization from Compiled Code |
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| 518 | </para></listitem> |
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| 519 | <listitem><para> |
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| 520 | <xref linkend="sect.VisAtt" /> |
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| 521 | Visualization Attributes |
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| 522 | </para></listitem> |
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| 523 | <listitem><para> |
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| 524 | <xref linkend="sect.VisEnhTrj" /> |
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| 525 | Enhanced Trajectory Drawing |
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| 526 | </para></listitem> |
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| 527 | <listitem><para> |
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| 528 | <xref linkend="sect.VisPlylMrkTxt" /> |
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| 529 | Polylines, Markers and Text |
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| 530 | </para></listitem> |
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[921] | 531 | <listitem><para> |
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| 532 | <xref linkend="sect.MkMovie" /> |
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| 533 | Making a Movie |
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| 534 | </para></listitem> |
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[904] | 535 | </itemizedlist> |
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| 536 | </para> |
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| 537 | |
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| 538 | <para> |
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| 539 | Other useful references for Geant4 visualization outside of this |
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| 540 | user guide: |
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| 541 | |
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| 542 | <itemizedlist spacing="compact"> |
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| 543 | <listitem><para> |
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| 544 | Introduction to Geant4 Visualization ( |
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[1222] | 545 | <ulink url="http://geant4.slac.stanford.edu/Presentations/vis/G4VisIntroduction.pdf"> |
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[904] | 546 | pdf</ulink>, |
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[1222] | 547 | <ulink url="http://geant4.slac.stanford.edu/Presentations/vis/G4VisIntroduction.ppt"> |
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[904] | 548 | ppt</ulink> ) |
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| 549 | </para></listitem> |
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| 550 | <listitem><para> |
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[1222] | 551 | Geant4 Visualization Commands ( |
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| 552 | <ulink url="http://geant4.slac.stanford.edu/Presentations/vis/G4VisCommands.pdf"> |
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[904] | 553 | pdf</ulink>, |
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[1222] | 554 | <ulink url="http://geant4.slac.stanford.edu/Presentations/vis/G4VisCommands.ppt"> |
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[904] | 555 | ppt</ulink> ) |
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| 556 | </para></listitem> |
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| 557 | <listitem><para> |
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[1222] | 558 | Geant4 Advanced Visualization ( |
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| 559 | <ulink url="http://geant4.slac.stanford.edu/Presentations/vis/G4VisAdvanced.pdf"> |
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| 560 | pdf</ulink>, |
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| 561 | <ulink url="http://geant4.slac.stanford.edu/Presentations/vis/G4VisAdvanced.ppt"> |
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| 562 | ppt</ulink> ) |
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| 563 | </para></listitem> |
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| 564 | <listitem><para> |
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| 565 | How to Make a Movie ( |
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| 566 | <ulink url="http://geant4.slac.stanford.edu/Presentations/vis/HowToMakeAMovie.pdf"> |
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| 567 | pdf</ulink>, |
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| 568 | <ulink url="http://geant4.slac.stanford.edu/Presentations/vis/HowToMakeAMovie.ppt"> |
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| 569 | ppt</ulink> ) |
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| 570 | </para></listitem> |
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| 571 | <listitem><para> |
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| 572 | <ulink url="http://geant4.slac.stanford.edu/Presentations/vis/G4HepRAppTutorial/G4HepRAppTutorial.html"> |
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| 573 | Geant4 Visualization Tutorial using the HepRApp HepRep Browser</ulink> |
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| 574 | </para></listitem> |
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| 575 | <listitem><para> |
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| 576 | <ulink url="http://geant4.slac.stanford.edu/Presentations/vis/G4OpenGLTutorial/G4OpenGLTutorial.html"> |
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| 577 | Geant4 Visualization Tutorial using the OpenGL Event Display</ulink> |
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| 578 | </para></listitem> |
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| 579 | <listitem><para> |
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| 580 | <ulink url="http://geant4.slac.stanford.edu/Presentations/vis/G4DAWNTutorial/G4DAWNTutorial.html"> |
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| 581 | Geant4 Visualization Tutorial using the DAWN Event Display</ulink> |
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| 582 | </para></listitem> |
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| 583 | <listitem><para> |
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[904] | 584 | Macro files distributed in Geant4 source in |
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| 585 | <literal>examples/novice/N03/visTutor/</literal>. |
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| 586 | </para></listitem> |
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| 587 | </itemizedlist> |
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| 588 | </para> |
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| 589 | |
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| 590 | |
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| 591 | </sect2> |
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| 592 | </sect1> |
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