Fixed placement of the beam pipe from earlier PR

Author: Cas1997

Detectors/Upgrades/ALICE3/Passive/src/Pipe.cxx

@@ -94,20 +94,20 @@ void Alice3Pipe::ConstructGeometry()
   // - pipe C Side (which hosts the primary vacuum vessel and covers all C Side as well)
 
   // A3IP update
-  Double_t pipeASideLength = mA3IPLength / 2. - mVacuumVesselThick - mVacuumVesselASideLength;
-  Double_t pipeCSideLength = mA3IPLength / 2. + mVacuumVesselASideLength;
+  Double_t pipeASideLength = mA3IPLength / 2. - mVacuumVesselThick - mVacuumVesselASideLength/2.;
+  Double_t pipeCSideLength = mA3IPLength / 2. + mVacuumVesselASideLength/2.;
 
   // Pipe tubes
   TGeoTube* pipeASide = new TGeoTube("PIPE_Ash", mPipeRIn, mPipeRIn + mPipeThick, pipeASideLength / 2.);
   TGeoTube* pipeCSide = new TGeoTube("PIPE_Csh", mVacuumVesselRIn, mVacuumVesselRIn + mVacuumVesselThick, pipeCSideLength / 2.);
   TGeoTube* vacuumVesselWall = new TGeoTube("VACUUM_VESSEL_WALLsh", mPipeRIn, mVacuumVesselRIn + mVacuumVesselThick, mVacuumVesselThick / 2.);
 
   // Pipe and vacuum vessel positions
-  TGeoTranslation* posPipeASide = new TGeoTranslation("PIPE_ASIDE_POSITION", 0, 0, mVacuumVesselASideLength + mVacuumVesselThick + pipeASideLength / 2.);
+  TGeoTranslation* posPipeASide = new TGeoTranslation("PIPE_ASIDE_POSITION", 0, 0, mVacuumVesselASideLength/2. + mVacuumVesselThick + pipeASideLength / 2.);
   posPipeASide->RegisterYourself();
-  TGeoTranslation* posPipeCSide = new TGeoTranslation("PIPE_CSIDE_POSITION", 0, 0, mVacuumVesselASideLength - pipeCSideLength / 2.);
+  TGeoTranslation* posPipeCSide = new TGeoTranslation("PIPE_CSIDE_POSITION", 0, 0, mVacuumVesselASideLength/2. - pipeCSideLength / 2.);
   posPipeCSide->RegisterYourself();
-  TGeoTranslation* posVacuumVesselWall = new TGeoTranslation("WALL_POSITION", 0, 0, mVacuumVesselASideLength + mVacuumVesselThick / 2.);
+  TGeoTranslation* posVacuumVesselWall = new TGeoTranslation("WALL_POSITION", 0, 0, mVacuumVesselASideLength/2. + mVacuumVesselThick / 2.);
   posVacuumVesselWall->RegisterYourself();
 
   // Pipe composite shape and volume

Detectors/Upgrades/ALICE3/TRK/simulation/src/TRKServices.cxx

@@ -140,17 +140,17 @@ void TRKServices::createVacuumCompositeShape()
   Double_t vacuumVesselLength = 76.f;
 
   // Vacuum for A and C Side
-  Double_t vacuumASideLength = A3IPLength / 2. - vacuumVesselThickness - vacuumVesselLength;
-  Double_t vacuumCSideLength = A3IPLength / 2. + vacuumVesselLength;
+  Double_t vacuumASideLength = A3IPLength / 2. - vacuumVesselThickness - vacuumVesselLength/2.;
+  Double_t vacuumCSideLength = A3IPLength / 2. + vacuumVesselLength/2.;
 
   // Vacuum tubes
   TGeoTube* vacuumASide = new TGeoTube("VACUUM_Ash", 0., pipeRIn, vacuumASideLength / 2.);
   TGeoTube* vacuumCSide = new TGeoTube("VACUUM_Csh", 0., vacuumVesselRIn, vacuumCSideLength / 2.);
 
   // Vacuum positions
-  TGeoTranslation* posVacuumASide = new TGeoTranslation("VACUUM_ASIDE_POSITION", 0, 0, vacuumVesselLength + vacuumVesselThickness + vacuumASideLength / 2.);
+  TGeoTranslation* posVacuumASide = new TGeoTranslation("VACUUM_ASIDE_POSITION", 0, 0, vacuumVesselLength/2. + vacuumVesselThickness + vacuumASideLength / 2.);
   posVacuumASide->RegisterYourself();
-  TGeoTranslation* posVacuumCSide = new TGeoTranslation("VACUUM_CSIDE_POSITION", 0, 0, vacuumVesselLength - vacuumCSideLength / 2.);
+  TGeoTranslation* posVacuumCSide = new TGeoTranslation("VACUUM_CSIDE_POSITION", 0, 0, vacuumVesselLength/2. - vacuumCSideLength / 2.);
   posVacuumCSide->RegisterYourself();
 
   mVacuumCompositeFormula =