From b7ef2467896567d11e3318d422eb70ea7f5e6279 Mon Sep 17 00:00:00 2001
From: Jefferson Amstutz <jamstutz@nvidia.com>
Date: Wed, 13 Mar 2024 13:41:05 -0500
Subject: [PATCH] fix assumption that ANARIMapperVolume only consumed point
 data

---
 vtkm/interop/anari/ANARIMapperVolume.cxx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/vtkm/interop/anari/ANARIMapperVolume.cxx b/vtkm/interop/anari/ANARIMapperVolume.cxx
index 904ced3df..840f6e187 100644
--- a/vtkm/interop/anari/ANARIMapperVolume.cxx
+++ b/vtkm/interop/anari/ANARIMapperVolume.cxx
@@ -132,6 +132,8 @@ void ANARIMapperVolume::ConstructArrays(bool regenerate)
   const auto& cells = actor.GetCellSet();
   const auto& fieldArray = actor.GetField().GetData();
 
+  const bool isPointBased =
+    actor.GetField().GetAssociation() == vtkm::cont::Field::Association::Points;
   const bool isStructured = cells.CanConvert<vtkm::cont::CellSetStructured<3>>();
   const bool isScalar = fieldArray.GetNumberOfComponentsFlat() == 1;
 
@@ -140,7 +142,8 @@ void ANARIMapperVolume::ConstructArrays(bool regenerate)
   if (isStructured && isScalar)
   {
     auto structuredCells = cells.AsCellSet<vtkm::cont::CellSetStructured<3>>();
-    auto pdims = structuredCells.GetPointDimensions();
+    auto pdims =
+      isPointBased ? structuredCells.GetPointDimensions() : structuredCells.GetCellDimensions();
 
     VolumeArrays arrays;