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diff --git a/thirdparty/thekla_atlas/nvmesh/param/ParameterizationQuality.h b/thirdparty/thekla_atlas/nvmesh/param/ParameterizationQuality.h
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+++ b/thirdparty/thekla_atlas/nvmesh/param/ParameterizationQuality.h
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+// Copyright NVIDIA Corporation 2008 -- Ignacio Castano <icastano@nvidia.com>
+
+#pragma once
+#ifndef NV_MESH_PARAMETERIZATIONQUALITY_H
+#define NV_MESH_PARAMETERIZATIONQUALITY_H
+
+#include <nvmesh/nvmesh.h>
+
+namespace nv
+{
+    class Vector2;
+    class Vector3;
+
+    namespace HalfEdge { class Mesh; }
+
+    // Estimate quality of existing parameterization.
+    NVMESH_CLASS class ParameterizationQuality
+    {
+    public:
+        ParameterizationQuality();
+        ParameterizationQuality(const HalfEdge::Mesh * mesh);
+
+        bool isValid() const;
+
+        float rmsStretchMetric() const;
+        float maxStretchMetric() const;
+
+        float rmsConformalMetric() const;
+        float maxAuthalicMetric() const;
+
+        void operator += (const ParameterizationQuality & pq);
+
+    private:
+
+        void processTriangle(Vector3 p[3], Vector2 t[3]);
+
+    private:
+
+        uint m_totalTriangleCount;
+        uint m_flippedTriangleCount;
+        uint m_zeroAreaTriangleCount;
+
+        float m_parametricArea;
+        float m_geometricArea;
+
+        float m_stretchMetric;
+        float m_maxStretchMetric;
+
+        float m_conformalMetric;
+        float m_authalicMetric;
+
+    };
+
+} // nv namespace
+
+#endif // NV_MESH_PARAMETERIZATIONQUALITY_H