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diff --git a/source/blender/blenkernel/BKE_attribute_math.hh b/source/blender/blenkernel/BKE_attribute_math.hh
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+++ b/source/blender/blenkernel/BKE_attribute_math.hh
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+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "BLI_color.hh"
+#include "BLI_float2.hh"
+#include "BLI_float3.hh"
+#include "DNA_customdata_types.h"
+
+namespace blender::attribute_math {
+
+/**
+ * Utility function that simplifies calling a templated function based on a custom data type.
+ */
+template<typename Func>
+void convert_to_static_type(const CustomDataType data_type, const Func &func)
+{
+  switch (data_type) {
+    case CD_PROP_FLOAT:
+      func(float());
+      break;
+    case CD_PROP_FLOAT2:
+      func(float2());
+      break;
+    case CD_PROP_FLOAT3:
+      func(float3());
+      break;
+    case CD_PROP_INT32:
+      func(int());
+      break;
+    case CD_PROP_BOOL:
+      func(bool());
+      break;
+    case CD_PROP_COLOR:
+      func(Color4f());
+      break;
+    default:
+      BLI_assert(false);
+      break;
+  }
+}
+
+/* Interpolate between three values. */
+template<typename T> T mix3(const float3 &weights, const T &v0, const T &v1, const T &v2);
+
+template<> inline bool mix3(const float3 &weights, const bool &v0, const bool &v1, const bool &v2)
+{
+  return (weights.x * v0 + weights.y * v1 + weights.z * v2) >= 0.5f;
+}
+
+template<> inline int mix3(const float3 &weights, const int &v0, const int &v1, const int &v2)
+{
+  return static_cast<int>(weights.x * v0 + weights.y * v1 + weights.z * v2);
+}
+
+template<>
+inline float mix3(const float3 &weights, const float &v0, const float &v1, const float &v2)
+{
+  return weights.x * v0 + weights.y * v1 + weights.z * v2;
+}
+
+template<>
+inline float2 mix3(const float3 &weights, const float2 &v0, const float2 &v1, const float2 &v2)
+{
+  return weights.x * v0 + weights.y * v1 + weights.z * v2;
+}
+
+template<>
+inline float3 mix3(const float3 &weights, const float3 &v0, const float3 &v1, const float3 &v2)
+{
+  return weights.x * v0 + weights.y * v1 + weights.z * v2;
+}
+
+template<>
+inline Color4f mix3(const float3 &weights, const Color4f &v0, const Color4f &v1, const Color4f &v2)
+{
+  Color4f result;
+  interp_v4_v4v4v4(result, v0, v1, v2, weights);
+  return result;
+}
+
+}  // namespace blender::attribute_math