Fix NanoVDB compile errors with recent NanoVDB versions

There were some changes to the NanoVDB API that broke the way Cycles was previously using it.
With these changes it compiles successfully again and also still compiles with the NanoVDB revision
that is currently part of the Blender dependencies. Ref T81454.

1 files changed, 5 insertions, 5 deletions

diff --git a/intern/cycles/kernel/kernels/cuda/kernel_cuda_image.h b/intern/cycles/kernel/kernels/cuda/kernel_cuda_image.h
index b8aaacba960..001bc652810 100644
--- a/intern/cycles/kernel/kernels/cuda/kernel_cuda_image.h
+++ b/intern/cycles/kernel/kernels/cuda/kernel_cuda_image.h
@@ -159,18 +159,18 @@ ccl_device_inline T kernel_tex_image_interp_nanovdb(
     const TextureInfo &info, float x, float y, float z, uint interpolation)
 {
   using namespace nanovdb;
-  typedef ReadAccessor<NanoRoot<T>> ReadAccessorT;
 
   NanoGrid<T> *const grid = (NanoGrid<T> *)info.data;
-  const NanoRoot<T> &root = grid->tree().root();
+  typedef typename nanovdb::NanoGrid<T>::AccessorType AccessorType;
+  AccessorType acc = grid->getAccessor();
 
   switch (interpolation) {
     case INTERPOLATION_CLOSEST:
-      return NearestNeighborSampler<ReadAccessorT, false>(root)(Vec3f(x, y, z));
+      return SampleFromVoxels<AccessorType, 0, false>(acc)(Vec3f(x, y, z));
     case INTERPOLATION_LINEAR:
-      return TrilinearSampler<ReadAccessorT, false>(root)(Vec3f(x - 0.5f, y - 0.5f, z - 0.5f));
+      return SampleFromVoxels<AccessorType, 1, false>(acc)(Vec3f(x - 0.5f, y - 0.5f, z - 0.5f));
     default:
-      TrilinearSampler<ReadAccessorT, false> s(root);
+      SampleFromVoxels<AccessorType, 1, false> s(acc);
       return kernel_tex_image_interp_tricubic_nanovdb<T>(s, x - 0.5f, y - 0.5f, z - 0.5f);
   }
 }