G4PVParameterised Voxelization/Optimization Documentation

[natemacfadden]

Hello,
I have been trying to understand

1. the voxelization of parameterised volumes and
2. the differences between G4ParameterisedNavigation and G4NormalNavigation.

I could not find these details in the user manuals but I am sure they must be somewhere. These seem to be relatively complicated so scouring the source code is not providing quick progress.

Thank you for the help!

[gcosmo]

You can find some specifications in the Toolkit Developers Guide:

• http://geant4-userdoc.web.cern.ch/geant4-userdoc/UsersGuides/ForToolkitDeveloper/html/OOAnalysisDesign/Geometry/geometry.html
• http://geant4-userdoc.web.cern.ch/geant4-userdoc/UsersGuides/ForToolkitDeveloper/html/GuideToExtendFunctionality/Geometry/geometry.html#modifying-the-navigator

Not sure what you need the information for… but the helper classes G4NormalNavigation and G4ParameterisedNavigation are used for treating non-voxelised navigation in geometry trees containing normal placement volumes or parameterised volumes respectively. G4VoxelNavigation instead applies to geometry trees (normal or parameterised) that have been optimised through the generation of a voxels structure, to reduce the look-up time of candidates for intersection during tracking.