1 files changed, 36 insertions, 0 deletions
diff --git a/intern/cycles/util/util_openvdb.h b/intern/cycles/util/util_openvdb.h
index a3ebb03e5a4..ae5326e3199 100644
--- a/intern/cycles/util/util_openvdb.h
+++ b/intern/cycles/util/util_openvdb.h
@@ -25,6 +25,42 @@ namespace openvdb {
 using Vec4fTree = tree::Tree4<Vec4f, 5, 4, 3>::Type;
 using Vec4fGrid = Grid<Vec4fTree>;
 
+/* Apply operation to known grid types. */
+template<typename OpType>
+bool grid_type_operation(const openvdb::GridBase::ConstPtr &grid, OpType &&op)
+{
+  if (grid->isType<openvdb::FloatGrid>()) {
+    return op.template operator()<openvdb::FloatGrid, openvdb::FloatGrid, float, 1>(grid);
+  }
+  else if (grid->isType<openvdb::Vec3fGrid>()) {
+    return op.template operator()<openvdb::Vec3fGrid, openvdb::Vec3fGrid, openvdb::Vec3f, 3>(grid);
+  }
+  else if (grid->isType<openvdb::BoolGrid>()) {
+    return op.template operator()<openvdb::BoolGrid, openvdb::FloatGrid, float, 1>(grid);
+  }
+  else if (grid->isType<openvdb::DoubleGrid>()) {
+    return op.template operator()<openvdb::DoubleGrid, openvdb::FloatGrid, float, 1>(grid);
+  }
+  else if (grid->isType<openvdb::Int32Grid>()) {
+    return op.template operator()<openvdb::Int32Grid, openvdb::FloatGrid, float, 1>(grid);
+  }
+  else if (grid->isType<openvdb::Int64Grid>()) {
+    return op.template operator()<openvdb::Int64Grid, openvdb::FloatGrid, float, 1>(grid);
+  }
+  else if (grid->isType<openvdb::Vec3IGrid>()) {
+    return op.template operator()<openvdb::Vec3IGrid, openvdb::Vec3fGrid, openvdb::Vec3f, 3>(grid);
+  }
+  else if (grid->isType<openvdb::Vec3dGrid>()) {
+    return op.template operator()<openvdb::Vec3dGrid, openvdb::Vec3fGrid, openvdb::Vec3f, 3>(grid);
+  }
+  else if (grid->isType<openvdb::MaskGrid>()) {
+    return op.template operator()<openvdb::MaskGrid, openvdb::FloatGrid, float, 1>(grid);
+  }
+  else {
+    return false;
+  }
+}
+
 };  // namespace openvdb
 
 #endif