ITS3: extend wrapvolZ to include outer edges

Signed-off-by: Felix Schlepper <felix.schlepper@cern.ch>

Author: f3sch

Detectors/Upgrades/ITS3/simulation/include/ITS3Simulation/DescriptorInnerBarrelITS3.h

@@ -45,9 +45,9 @@ class DescriptorInnerBarrelITS3 : public o2::its::DescriptorInnerBarrel
   int mNumLayers{constants::nLayers};
 
   // wrapper volume properties
-  double mWrapperMinRadiusITS3{1.8};
-  double mWrapperMaxRadiusITS3{4.};
-  double mWrapperZSpanITS3{20.};
+  static constexpr double mWrapperMinRadiusITS3{1.8};
+  static constexpr double mWrapperMaxRadiusITS3{4.};
+  static constexpr double mWrapperZSpanITS3{constants::segment::length + 5.};
 
  private:
   std::array<std::unique_ptr<ITS3Layer>, constants::nLayers> mIBLayers;