Add crude (placeholder) implementations of RICH gas volume intersections

Core/include/Core/DeIOV.h

@@ -29,18 +29,27 @@ namespace LHCb::Detector {
     inline static constexpr double GaudiTeV           = 1.0;
     inline static constexpr double DD4hepToLHCbEnergy = dd4hep::TeV / GaudiTeV;
     //
-    inline auto toLHCbLengthUnits( const double length ) { return DD4hepToLHCbCm * length; }
-    inline auto toLHCbAreaUnits( const double area ) { return DD4hepToLHCbCm * DD4hepToLHCbCm * area; }
-    inline auto toLHCbEnergyUnits( const double energy ) { return DD4hepToLHCbEnergy * energy; }
+    template <typename TYPE>
+    inline TYPE toLHCbLengthUnits( const TYPE length ) {
+      return DD4hepToLHCbCm * length;
+    }
+    template <typename TYPE>
+    inline TYPE toLHCbAreaUnits( const TYPE area ) {
+      return DD4hepToLHCbCm * DD4hepToLHCbCm * area;
+    }
+    template <typename TYPE>
+    inline TYPE toLHCbEnergyUnits( const TYPE energy ) {
+      return DD4hepToLHCbEnergy * energy;
+    }
     inline ROOT::Math::Transform3D toLHCbLengthUnits( const ROOT::Math::Transform3D& t ) {
-      double xx{}, xy{}, xz{}, dx{}, yx{}, yy{}, yz{}, dy{}, zx{}, zy{}, zz{}, dz{};
+      ROOT::Math::Transform3D::Scalar xx{}, xy{}, xz{}, dx{}, yx{}, yy{}, yz{}, dy{}, zx{}, zy{}, zz{}, dz{};
       t.GetComponents( xx, xy, xz, dx, yx, yy, yz, dy, zx, zy, zz, dz );
       return {xx, xy, xz, toLHCbLengthUnits( dx ), //
               yx, yy, yz, toLHCbLengthUnits( dy ), //
               zx, zy, zz, toLHCbLengthUnits( dz )};
     }
     inline ROOT::Math::Translation3D toLHCbLengthUnits( const ROOT::Math::Translation3D& t ) {
-      double dx{}, dy{}, dz{};
+      ROOT::Math::Translation3D::Scalar dx{}, dy{}, dz{};
       t.GetComponents( dx, dy, dz );
       return {toLHCbLengthUnits( dx ), toLHCbLengthUnits( dy ), toLHCbLengthUnits( dz )};
     }