Source visualization

[tontyoutoure]

Currently it's only working for generic source and it's derived classes, since the GateVSource does not provide methods to generate position sampling.

Docs and tests are also included.

[tbaudier]

Hello @tontyoutoure

Thank you for your contribution, it's very helpful. I modify a little bit to be able to call the visualization parameters in the way than the other parameters. I let you check the commit and resolve the conflict.

[tontyoutoure]

@tbaudier I've tested merging into current master branch (commit edac4cd). It generates no conflict now.

[tontyoutoure]

@tbaudier currently all sources will be defaultly visualized with ("red", 2000, 3). Do you think this is a good idea?

[dsarrut]

Very good, thanks @tontyoutoure !

• Backend : Maybe the "RequestVisualization" and other visualisation related function, should be in the GateVSource base class. What do you think ? Hence, it should work with other type of sources.
• Frontend : the visualisation options
  source.visualization.count = 2000
  source.visualization.color = "yellow"
  source.visualization.size = 2
  is good from my side. Unsure about the default values, my first guess is that, indeed, we can enabled the source visualisation by default.
• Tests : does it work with all visualization modes (qt, vrml, gdml ?). If not, we only need to document it.

[tontyoutoure]

@dsarrut I'm not sure moving RequestVisualization into GateVSource is a good idea. Simpling moving it can work, but the current function signature void RequestVisualization(G4int count, py::object color, G4double size); clearly indicate that it's a point cloud, which need position sampling, which GateVSource is not able to do. On the other hand since @tbaudier change the python api from a method of GenericSource to its attributes, I think renaming RequestVisualization into InitializeVisualiztion and call it in InitializeUserInfo is a better idea.

[tontyoutoure]

@dsarrut I'm sure this don't work under vrml:

However I cannot make gdml visualization work on my machine, not even test004_simple_visu_gdml.py, only result in SegFault. Can you test it with test010_generic_source_visu.py?