|Message: Peculiar problem: Overlapping Voxels in Parallel World affects particle tracks||Not Logged In (login)|
Click on the Forum title, e.g. on the "Forums by Category" page, to read a sequence of postings to the Forum and its threads all in one page. If you are only interested in one thread or the thread following a specific posting, click the thread or the posting, which takes you to a smaller page, which contains only the part you are interested in and may be easier to navigate.
Messages are "chained" if there are only replies at the first level, i.e. 1/1.html, 1/1/1.html etc. In case of "chained" messages the message number is replaced by the icon and there is no indentation.
Inline: Display the subject line only or also the text of the posting(s); for the choice "All" the "Outline" choices are switched off.
|1||0||1||no text / full text of posting|
|2||1||All||text for level 1 only / text for All postings|
Outline: Choose the depth of the posting thread, successive toggle controls provide increasing detail.
|1||2||1||2 levels / 1 level (original posting)|
|2||3||2||3 levels / 2 levels|
|3||3||All||3 levels / all levels (all postings)|
I solved a problem that I found peculiar this morning -- and I thought that I'd let members of the community know about it, and also see if anyone has any explanation of what may have caused the problem.
I was running the same simulation in two Geant programs, one with no parallel worlds or scoring, and another in my colleague's program with a parallel world scoring class implemented.
I thought that I would look at a visualisation of the particle tracks to check that the two simulations were consistent (same GPS source, same detector geometry & random seed) but noticed that the tracks were certainly different.
Finding no reason for the discrepancy in results, I moved on to modifying other parts of the program. I noticed that the SphericalParameterisation class that creates scoring spheres in the (non-physical) scoring world, was implemented incorrectly, and had overlapping spheres. As soon as I fixed the scoring spheres the tracks from the two programs were consistent with one another again.
I'm having a hard time understanding why overlapping voxels, in a parallel world that should have no interactions with particles in the physical world would yield such results.
Has anyone experienced anything similar, or have any ideas on what caused the behaviour I experienced?
|Inline Depth:||Outline Depth:||Add message:|