Fix cross product filter interface

The GetPrimaryFieldName and GetPrimaryFieldAssociation methods were
returning values for the secondary field and vice versa. Correct that.

vtkm/filter/CrossProduct.h

@@ -46,10 +46,10 @@ public:
     this->SetActiveField(name, association);
   }
 
-  VTKM_CONT const std::string& GetPrimaryFieldName() const { return this->SecondaryFieldName; }
+  VTKM_CONT const std::string& GetPrimaryFieldName() const { return this->GetActiveFieldName(); }
   VTKM_CONT vtkm::cont::Field::Association GetPrimaryFieldAssociation() const
   {
-    return this->SecondaryFieldAssociation;
+    return this->GetActiveFieldAssociation();
   }
   //@}
 
@@ -92,10 +92,10 @@ public:
     this->SecondaryFieldAssociation = association;
   }
 
-  VTKM_CONT const std::string& GetSecondaryFieldName() const { return this->GetActiveFieldName(); }
+  VTKM_CONT const std::string& GetSecondaryFieldName() const { return this->SecondaryFieldName; }
   VTKM_CONT vtkm::cont::Field::Association GetSecondaryFieldAssociation() const
   {
-    return this->GetActiveFieldAssociation();
+    return this->SecondaryFieldAssociation;
   }
   //@}
 

vtkm/filter/testing/UnitTestCrossProductFilter.cxx

@@ -156,7 +156,22 @@ void TestCrossProduct()
       std::cout << "  Both vectors as normal fields" << std::endl;
       vtkm::filter::CrossProduct filter;
       filter.SetPrimaryField("vec1");
-      filter.SetSecondaryField("vec2");
+      filter.SetSecondaryField("vec2", vtkm::cont::Field::Association::POINTS);
+
+      // Check to make sure the fields are reported as correct.
+      VTKM_TEST_ASSERT(filter.GetPrimaryFieldName() == "vec1", "Bad field name.");
+      VTKM_TEST_ASSERT(filter.GetPrimaryFieldAssociation() == vtkm::cont::Field::Association::ANY,
+                       "Bad field association.");
+      VTKM_TEST_ASSERT(filter.GetUseCoordinateSystemAsPrimaryField() == false,
+                       "Bad use coordinates.");
+
+      VTKM_TEST_ASSERT(filter.GetSecondaryFieldName() == "vec2", "Bad field name.");
+      VTKM_TEST_ASSERT(filter.GetSecondaryFieldAssociation() ==
+                         vtkm::cont::Field::Association::POINTS,
+                       "Bad field association.");
+      VTKM_TEST_ASSERT(filter.GetUseCoordinateSystemAsSecondaryField() == false,
+                       "Bad use coordinates.");
+
       vtkm::cont::DataSet result = filter.Execute(dataSet);
       CheckResult(field1, field2, result);
     }
@@ -167,6 +182,17 @@ void TestCrossProduct()
       filter.SetUseCoordinateSystemAsPrimaryField(true);
       filter.SetPrimaryCoordinateSystem(1);
       filter.SetSecondaryField("vec2");
+
+      // Check to make sure the fields are reported as correct.
+      VTKM_TEST_ASSERT(filter.GetUseCoordinateSystemAsPrimaryField() == true,
+                       "Bad use coordinates.");
+
+      VTKM_TEST_ASSERT(filter.GetSecondaryFieldName() == "vec2", "Bad field name.");
+      VTKM_TEST_ASSERT(filter.GetSecondaryFieldAssociation() == vtkm::cont::Field::Association::ANY,
+                       "Bad field association.");
+      VTKM_TEST_ASSERT(filter.GetUseCoordinateSystemAsSecondaryField() == false,
+                       "Bad use coordinates.");
+
       vtkm::cont::DataSet result = filter.Execute(dataSet);
       CheckResult(field1, field2, result);
     }
@@ -177,6 +203,17 @@ void TestCrossProduct()
       filter.SetPrimaryField("vec1");
       filter.SetUseCoordinateSystemAsSecondaryField(true);
       filter.SetSecondaryCoordinateSystem(2);
+
+      // Check to make sure the fields are reported as correct.
+      VTKM_TEST_ASSERT(filter.GetPrimaryFieldName() == "vec1", "Bad field name.");
+      VTKM_TEST_ASSERT(filter.GetPrimaryFieldAssociation() == vtkm::cont::Field::Association::ANY,
+                       "Bad field association.");
+      VTKM_TEST_ASSERT(filter.GetUseCoordinateSystemAsPrimaryField() == false,
+                       "Bad use coordinates.");
+
+      VTKM_TEST_ASSERT(filter.GetUseCoordinateSystemAsSecondaryField() == true,
+                       "Bad use coordinates.");
+
       vtkm::cont::DataSet result = filter.Execute(dataSet);
       CheckResult(field1, field2, result);
     }