add changelog

docs/changelog/NewFilterField.md

@@ -0,0 +1,18 @@
+## NewFilterField
+
+As part of the New Filter Interface Design, `FilterField`, `FilterDataSet`
+and `FilterDataSetWithField` are now refactored into a single
+`NewFilterField`. A `NewFilterField` takes an input `DataSet` with some
+`Fields`, operates on the input `CellSet` and/or `Field` and generates an
+output DataSet, possibly with a new `CellSet` and/or `Field`.
+
+Unlike the old `FilterField`, `NewFilterField` can support arbitrary number
+of *active* `Field`s. They are set by the extended `SetActiveField` method
+which now also takes an integer index.
+
+`SupportedType` and `Policy` are no longer supported or needed by
+`NewFilterField`. Implementations are given full responsibility of extracting
+an `ArrayHandle` with proper value and storage type list from an input `Field`
+(through a variant of `CastAndCall`). Automatic type conversion from unsupported
+value types to `FloatDefault` is also added to UnknownArrayHandle. See
+`DotProduct::DoExecute` for an example on how to use the new facility.

vtkm/filter/NewFilterField.h

@@ -85,6 +85,8 @@ public:
     return this->UseCoordinateSystemAsField[index];
   }
   //@}
+
+protected:
   VTKM_CONT
   const vtkm::cont::Field& GetFieldFromDataSet(const vtkm::cont::DataSet& input) const
   {

vtkm/filter/vector_calculus/DotProduct.cxx

@@ -44,7 +44,7 @@ namespace filter
 namespace vector_calculus
 {
 
-VTKM_CONT_EXPORT DotProduct::DotProduct()
+VTKM_CONT DotProduct::DotProduct()
 {
   this->SetOutputFieldName("dotproduct");
 }
@@ -82,7 +82,7 @@ struct ResolveTypeFunctor
   }
 };
 
-VTKM_CONT_EXPORT vtkm::cont::DataSet DotProduct::DoExecute(const vtkm::cont::DataSet& inDataSet)
+VTKM_CONT vtkm::cont::DataSet DotProduct::DoExecute(const vtkm::cont::DataSet& inDataSet)
 {
   const auto& primaryArray = this->GetFieldFromDataSet(inDataSet).GetData();