| Geant4 Cross Reference |
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2 G4RayTracer version 1.0 (29/Jan/00)
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4 1. Introduction
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6 G4RayTracer is a "ray tracing" package which
7 of tracking/navigation. It visualizes any kind
8 kernel can navigate.
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10 2. Building a library
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12 G4RayTracer is one of visualization driver wh
13 a library of G4RayTracer (library name G4RayTr
14 variable G4VIS_BUILD_RAYTRACER_DRIVER.
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16 $ setenv G4VIS_BUILD_RAYTRACER_DRIVER 1
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18 3. Using G4RayTracer
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20 To use G4RayTracer, set an environment variab
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22 $ setenv G4VIS_USE_RAYTRACER 1
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24 Also, G4RayTracer has to be registored to the
25 Refer an example given in
26 geant4/source/visualization/management/inclu
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28 4. Notes
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30 a) G4RayTracer generates JPEG file(s). To visu
31 local program such as NetScape or xview, etc.
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33 b) The eye position must be inside of the defi
34 to draw your detector setup from very far posi
35 your world volume.
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37 c) G4RayTracer ignores volumes without G4VisAt
38 set as "forced wire frame", and volumes which
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40 d) In case you get unexpected figure, check
41 d.1) eye position and target position are pro
42 d.2) light direction is properly set (note li
43 illumination light source to the objects)
44 d.3) span angle (given by angle for 100 pixel
45 d.4) there is no surrounding volume(s) withou
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47 e) G4RayTracer can be executed ONLY AT "Idle"
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49 5. Basic UI commands
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51 a) /vis/rayTracer/eyePosition x y z unit
52 eye position
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54 b) /vis/rayTracer/target x y z unit
55 target position
56 in default it is set to the origine
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58 c) /vis/rayTracer/lightDirection ex ey ez
59 vector of the illuminating light (need not
60 note light direction is from illumination
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62 d) /vis/rayTracer/column nColumn
63 number of holizontal pixels
64 in default 640 pixels
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66 e) /vis/rayTracer/row nRow
67 number of virtical pixels
68 in default 640 pixels
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70 f) /vis/rayTracer/span angle unit
71 angle for 100 pixels
72 in default 5 degree
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74 g) /vis/rayTracer/trace fileName
75 execution of G4RayTracer
76 "fileName" is the out put JPEG file name
77 in default "g4RayTracer.jpeg"
78 NOTE THAT THIS COMMAND IS AVAILABLE ONLY A
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