Update of TPC fast space charge correction with splines

[sgorbuno]

The PR contains several commits:

• non-uniform grid that corresponds to the track residual voxels

• fixed propagation of the track residual data to the TPC row edges

• limits for SC correction values per TPC row

• fast merge of several corrections

• multithreaded reading of the residual tree

• fixed initialization of the track residuals in the test macro

• minimised number of coordinate transformations - everything is calculated in the local XYZ coordinates

• backward compatibility tested. When the old object is read with the new code, it behaves identically inside the spline grid. Outside the grid, new splines can behave differently because of the new propagation to the row edges.

[github-actions]

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[alibuild]

Error while checking build/O2/fullCI_slc9 for e820317 at 2025-10-07 11:17:

## sw/BUILD/O2-latest/log
/sw/SOURCES/O2/14723-slc9_x86-64/0/GPU/TPCFastTransformation/TPCFastSpaceChargeCorrection.cxx:297:10: error: 'void* memmove(void*, const void*, size_t)' writing to an object of type 'o2::gpu::TPCFastSpaceChargeCorrection::SplineType' {aka 'class o2::gpu::Spline2D<float, 3>'} with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Werror=class-memaccess]
make[2]: *** [GPU/TPCFastTransformation/CMakeFiles/TPCFastTransformation.dir/build.make:219: GPU/TPCFastTransformation/CMakeFiles/TPCFastTransformation.dir/TPCFastSpaceChargeCorrection.cxx.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:671: GPU/TPCFastTransformation/CMakeFiles/TPCFastTransformation.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:136: all] Error 2

Full log here.

[alibuild]

Error while checking build/O2/fullCI_slc9 for bacaa56 at 2025-10-15 16:15:

## sw/BUILD/O2-latest/log
/sw/SOURCES/O2/14723-slc9_x86-64/0/GPU/TPCFastTransformation/TPCFastSpaceChargeCorrection.cxx:297:10: error: 'void* memmove(void*, const void*, size_t)' writing to an object of type 'o2::gpu::TPCFastSpaceChargeCorrection::SplineType' {aka 'class o2::gpu::Spline2D<float, 3>'} with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Werror=class-memaccess]
make[2]: *** [GPU/TPCFastTransformation/CMakeFiles/TPCFastTransformation.dir/build.make:219: GPU/TPCFastTransformation/CMakeFiles/TPCFastTransformation.dir/TPCFastSpaceChargeCorrection.cxx.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:671: GPU/TPCFastTransformation/CMakeFiles/TPCFastTransformation.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:136: all] Error 2

Full log here.

[davidrohr]

@sgorbuno : I fixed some of the compile issues. However, now the macros are failing, because the convUVto... functions were removed or changed. Could you have a look and fix them?

[alibuild]

Error while checking build/O2/fullCI_slc9 for 7e41329 at 2025-10-15 21:29:

## sw/BUILD/o2checkcode-latest/log
--
========== List of errors found ==========
++ GRERR=0
++ grep -v clang-diagnostic-error error-log.txt
++ grep ' error:'
/sw/SOURCES/O2/14723-slc9_x86-64/0/Detectors/TPC/calibration/src/TPCFastSpaceChargeCorrectionHelper.cxx:797:29: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/14723-slc9_x86-64/0/Detectors/TPC/calibration/src/TPCFastSpaceChargeCorrectionHelper.cxx:799:74: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/14723-slc9_x86-64/0/Detectors/TPC/calibration/src/TPCFastSpaceChargeCorrectionHelper.cxx:801:74: error: statement should be inside braces [readability-braces-around-statements]
++ [[ 0 == 0 ]]
++ exit 1
--

Full log here.

[alibuild]

Error while checking build/O2/fullCI_slc9 for 1661fd6 at 2025-11-09 12:54:

## sw/BUILD/O2Physics-latest/log
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
[0 more errors; see full log]

Full log here.

[github-actions]

This PR did not have any update in the last 30 days. Is it still needed? Unless further action in will be closed in 5 days.