TPC Splines: bugfix in the transformation within the time frame

cbmsw · cbmsw · commit cd5f934028a9 · 2026-02-06T23:53:59.000Z
diff --git a/GPU/TPCFastTransformation/TPCFastTransform.h b/GPU/TPCFastTransformation/TPCFastTransform.h
@@ -356,7 +356,7 @@ GPUdi() void TPCFastTransform::convPadTimeToLocal(int32_t sector, int32_t row, f
 
 GPUdi() void TPCFastTransform::convPadTimeToLocalInTimeFrame(int32_t sector, int32_t row, float pad, float time, float& y, float& z, float maxTimeBin) const
 {
-  float l = (time - mT0 - maxTimeBin) * mVdrift; // drift length [cm]
+  float l = getGeometry().getTPCzLength() + (time - mT0 - maxTimeBin) * mVdrift; // drift length [cm]
   const auto localval = getGeometry().convPadDriftLengthToLocal(sector, row, pad, l);
   y = localval[0];
   z = localval[1];

Original file line number	Diff line number	Diff line change
`@@ -356,7 +356,7 @@ GPUdi() void TPCFastTransform::convPadTimeToLocal(int32_t sector, int32_t row, f`
`356`	`356`
`357`	`357`	`GPUdi() void TPCFastTransform::convPadTimeToLocalInTimeFrame(int32_t sector, int32_t row, float pad, float time, float& y, float& z, float maxTimeBin) const`
`358`	`358`	`{`
`359`		`- float l = (time - mT0 - maxTimeBin) * mVdrift; // drift length [cm]`
	`359`	`+ float l = getGeometry().getTPCzLength() + (time - mT0 - maxTimeBin) * mVdrift; // drift length [cm]`
`360`	`360`	`const auto localval = getGeometry().convPadDriftLengthToLocal(sector, row, pad, l);`
`361`	`361`	`y = localval[0];`
`362`	`362`	`z = localval[1];`