STYLE: Remove pow, add constexpr to variable BSplineTransformInitializer

Using left-shift instead of `std::pow(2, x)` allows the local variable `BSplineTransformDomainEpsilon` to be declared `constexpr`.
InsightSoftwareConsortium · Feb 26, 2025 · e29e5cc · e29e5cc
1 parent fcae41b
commit e29e5cc
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/Modules/Core/Transform/include/itkBSplineTransformInitializer.hxx b/Modules/Core/Transform/include/itkBSplineTransformInitializer.hxx
@@ -100,7 +100,7 @@ BSplineTransformInitializer<TTransform, TImage>::InitializeTransform() const
   // We also store the corners using the point set class which gives us easy
   // access to the bounding box.
 
-  const CoordinateType BSplineTransformDomainEpsilon = std::pow(2.0, -3);
+  constexpr CoordinateType BSplineTransformDomainEpsilon{ 1.0 / double{ 1U << 3 } };
 
   ContinuousIndexType startIndex;
   for (unsigned int i = 0; i < SpaceDimension; ++i)