| Geant4 Cross Reference |
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2 Geant4 - an Object-Oriented Toolkit for S 2 Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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4 4
5 examples/extended/visualization 5 examples/extended/visualization/userVisAction
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7 7
8 This example illustrates how to create a "vis 8 This example illustrates how to create a "vis action".
9 9
10 The idea is that you register a vis action wit 10 The idea is that you register a vis action with the vis manager and
11 activate it by a command /vis/scene/add/userAc 11 activate it by a command /vis/scene/add/userAction. In this case, it
12 draws a simple logo. 12 draws a simple logo.
13 13
14 1) UVA_VisAction.cc defines a G4VUserVisAction 14 1) UVA_VisAction.cc defines a G4VUserVisAction and implements a Draw
15 method. 15 method.
16 16
17 2) In the main program, UVA_VisAction is insta 17 2) In the main program, UVA_VisAction is instantiated and
18 its pointer registerd with the visualizatio 18 its pointer registerd with the visualization manager. You may
19 optionally specify an extent at this point 19 optionally specify an extent at this point to assist the viewers to
20 locate the objects. 20 locate the objects.
21 21
22 3) To visualise, use the usual Geant4 vis comm 22 3) To visualise, use the usual Geant4 vis commands to create a view
23 and scene, then add the vis action to the s 23 and scene, then add the vis action to the scene with
24 /vis/scene/add/userAction - see vis.mac. 24 /vis/scene/add/userAction - see vis.mac.
25 25
26 Note: The system needs an "extent" in order to 26 Note: The system needs an "extent" in order to point the virtual
27 camera and adjust its field of view, etc. Thi 27 camera and adjust its field of view, etc. This defines the "standard
28 view". You may zoom, etc., from this standard 28 view". You may zoom, etc., from this standard view. The extent may
29 be specified as suggested above or by using /v 29 be specified as suggested above or by using /vis/scene/add/extent.
30 30
31 31
32 John Allison 32 John Allison
33 27th November 2014 33 27th November 2014