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0001 \page Examplemovies Example movies
0002
0003 examples/extended/visualization/movies
0004
0005 This example illustrates how to create a movie.
0006
0007 See https://geant4-userdoc.web.cern.ch/UsersGuides/ForApplicationDeveloper/html/Visualization/makingamovie.html#.
0008
0009 A) USING "/vis/viewer/save" AND "/vis/viewer/interpolate"
0010 =========================================================
0011
0012 1. a. To see a pre-prepared example, start this example in interactive mode
0013 (i.e., without any command line arguments). Just type
0014
0015 /vis/viewer/interpolate viewfiles/movie-1
0016
0017 If you want to see an electromagnetic shower
0018
0019 /run/beamOn
0020 /vis/viewer/interpolate viewfiles/movie-1
0021
0022 b. To make your own movie, save a sequence of views with
0023
0024 /vis/viewer/save
0025
0026 Then "fly through" with
0027
0028 /vis/viewer/interpolate".
0029
0030 The procedure is: choose a view, save, choose another view, save, and
0031 so on until you have, say, 10 saved views. Then you may
0032
0033 /vis/viewer/interpolate
0034
0035 Note: This saves views to your current working directory. It is
0036 always good to remove any pre-existing saved files:
0037
0038 rm *.g4view
0039
0040 or save them, e.g.
0041
0042 mkdir views
0043 mv *.g4view views
0044
0045 which can subsequently be interpolated with
0046
0047 /vis/viewer/interpolate views
0048
0049 c. Then you have a choice of how to export the movie - see 3 below.
0050
0051 2. You can use time-slicing to see particles progress through time
0052
0053 a. To see a pre-prepared example
0054
0055 /vis/modeling/trajectories/drawByCharge-0/default/setTimeSliceInterval 0.01 ns
0056 /run/beamOn
0057 /vis/viewer/interpolate viewfiles/movie-2
0058
0059 b. To make your own movie
0060
0061 /vis/scene/add/trajectories rich
0062 /vis/modeling/trajectories/drawByCharge-0/default/setTimeSliceInterval 0.01 ns
0063 # Optionally add features (see guidance on /vis/viewer/set/timeWindow/)
0064 /vis/viewer/set/timeWindow/displayLightFront true 0 0 -20 cm -0.01 ns
0065 /vis/viewer/set/timeWindow/displayHeadTime true
0066 /vis/viewer/set/timeWindow/fadeFactor 1
0067 /run/beamOn
0068 # Then set a time window and save
0069 /vis/viewer/set/timeWindow/startTime 0 ns .1 ns
0070 /vis/viewer/save
0071 # Then zoom, pan etc to a view of interest
0072 # Then set the next time window and save
0073 /vis/viewer/set/timeWindow/startTime .5 ns .1 ns
0074 /vis/viewer/save
0075 # Then zoom, pan etc to a view of interest
0076 # Then set the next time window and save
0077 /vis/viewer/set/timeWindow/startTime 1 ns .1 ns
0078 /vis/viewer/save
0079 # Then another view, the next time window, and a save...
0080 # ...repeat a few more times
0081 # Then try
0082 /vis/viewer/interpolate
0083
0084 3. How to export images using /vis/viewer/interpolate (OpenGL only)
0085
0086 /vis/viewer/interpolate ! ! ! ! export
0087
0088 This produces lots of files.
0089 You can change export format with (for example)
0090
0091 /vis/ogl/set/exportFormat jpg
0092
0093 Then import them into your favourite movie maker - see
0094 https://geant4-userdoc.web.cern.ch/UsersGuides/ForApplicationDeveloper/html/Visualization/makingamovie.html#
0095
0096 B) THE OLD WAY
0097 ==============
0098
0099 These files are inherited from the old "novice" example N03. They draw (and
0100 optionally, save) views using a macro loop. They have not been tested
0101 recently. Best to run in batch mode in the build directory. E.g.
0102
0103 ./movies -m visTutor/exN03Vis12.mac
0104 ./movies -m visTutor/exN03Vis13.mac
0105
0106
0107 John Allison
0108 15th February 2021
