From 5ad9c708256dd629353b26b07e5e51933001e4b9 Mon Sep 17 00:00:00 2001
From: ccolin <cyril.colin@etu.univ-amu.fr>
Date: Sat, 19 Feb 2022 00:39:00 +0100
Subject: [PATCH] specify aspect ratio filter input requirements

---
 src/aspect_ratio_filter.cc | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/aspect_ratio_filter.cc b/src/aspect_ratio_filter.cc
index b32019e..3dc70fa 100644
--- a/src/aspect_ratio_filter.cc
+++ b/src/aspect_ratio_filter.cc
@@ -1,18 +1,30 @@
 #include "aspect_ratio_filter.h"
+#include "vtkDataObject.h"
 
 #include <vtkUnstructuredGrid.h>
 #include <vtkPointData.h>
 #include <vtkCellData.h>
 #include <vtkDoubleArray.h>
 #include <vtkCellIterator.h>
+#include <vtkInformation.h>
+#include <vtkInformationVector.h>
 
 
 vtkStandardNewMacro(AspectRatioFilter);
 
 
+// Ensure there is an "angles", 12 floats tuple array in the DataCell.
 int AspectRatioFilter::FillInputPortInformation(int port, vtkInformation *info) {
 	vtkUnstructuredGridAlgorithm::FillInputPortInformation(port, info);
-	// Ensure there is an "angles" array in the DataCell.
+	vtkNew<vtkInformation> anglesField;
+	anglesField->Set(vtkDataObject::FIELD_ASSOCIATION(), vtkDataObject::FIELD_ASSOCIATION_CELLS);
+	anglesField->Set(vtkDataObject::FIELD_NAME(), "angles");
+	anglesField->Set(vtkDataObject::FIELD_NUMBER_OF_COMPONENTS(), 12);
+	anglesField->Set(vtkDataObject::FIELD_ARRAY_TYPE(), VTK_DOUBLE);
+
+	vtkNew<vtkInformationVector> fields;
+	fields->Append(anglesField);
+	info->Set(vtkAlgorithm::INPUT_REQUIRED_FIELDS(), fields);
 	return 1;
 }