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refactor: Refactor and fix accuracy property in ConstrainedStep #2532

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andiwand
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@andiwand andiwand commented Oct 11, 2023

I think the accuracy property of the ConstrainedStep should always be positive as we want to use it consistently in back stepping.

I encountered a situation where the overstepping was not accurate enough (the overstepping step exceeded the eigen stepper error tolerance), then the step length reduction mechanism fails and ends in an endless loop.

Pulled this out of #2518

@andiwand andiwand added this to the next milestone Oct 11, 2023
@github-actions github-actions bot added the Component - Core Affects the Core module label Oct 11, 2023
@andiwand andiwand added the 🛑 blocked This item is blocked by another item label Oct 12, 2023
@andiwand andiwand removed the 🛑 blocked This item is blocked by another item label Oct 13, 2023
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codecov bot commented Oct 13, 2023

Codecov Report

Merging #2532 (d00186b) into main (fa932cf) will increase coverage by 0.01%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##             main    #2532      +/-   ##
==========================================
+ Coverage   49.76%   49.77%   +0.01%     
==========================================
  Files         466      466              
  Lines       26353    26354       +1     
  Branches    12100    12098       -2     
==========================================
+ Hits        13114    13119       +5     
  Misses       4632     4632              
+ Partials     8607     8603       -4     
Files Coverage Δ
Core/include/Acts/Propagator/AtlasStepper.hpp 72.15% <0.00%> (ø)
Core/include/Acts/Propagator/EigenStepper.ipp 56.33% <82.35%> (+2.81%) ⬆️
Core/include/Acts/Propagator/ConstrainedStep.hpp 68.88% <72.22%> (+0.70%) ⬆️

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@andiwand
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since seeding performance changed I think that the fatras ttbar simulation changed a bit. but in general physmon looks okay to me

kodiakhq bot pushed a commit that referenced this pull request Oct 13, 2023
I noticed that the `CuboidVolumeBuilder` is not generating any envelope around the generated layer which results in overlapping surfaces which does not play nicely with navigation.

discovered in #2532
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Hmm the interface of this class is really not easy to get...

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@github-actions github-actions bot added the Component - Examples Affects the Examples module label Oct 18, 2023
@github-actions github-actions bot added Infrastructure Changes to build tools, continous integration, ... Changes Performance labels Oct 19, 2023
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Looks good to me!

@kodiakhq kodiakhq bot merged commit 5e0b311 into acts-project:main Oct 20, 2023
55 checks passed
@andiwand andiwand deleted the refactor-and-fix-accuracy-constrained-step branch October 20, 2023 07:54
@acts-project-service acts-project-service added the Fails Athena tests This PR causes a failure in the Athena tests label Oct 20, 2023
andiwand added a commit to andiwand/acts that referenced this pull request Oct 20, 2023
kodiakhq bot pushed a commit that referenced this pull request Oct 20, 2023
andiwand added a commit to andiwand/acts that referenced this pull request Oct 20, 2023
…cts-project#2532)

I think the accuracy property of the `ConstrainedStep` should always be positive as we want to use it consistently in back stepping.

I encountered a situation where the overstepping was not accurate enough (the overstepping step exceeded the eigen stepper error tolerance), then the step length reduction mechanism fails and ends in an endless loop.

Pulled this out of acts-project#2518
@paulgessinger paulgessinger modified the milestones: next, v30.3.0 Oct 25, 2023
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4 participants