public void TestSubPolygon()
        {
            var meshPoints = new[]
            {
                new V3d(5719.47607421875, 10842.48046875, 269.109008789063),
                new V3d(5719.47607421875, 10600.814453125, 269.109008789063),
                new V3d(5719.623046875, 10603.544921875, 271.355010986328),
                new V3d(5719.8662109375, 10608.0615234375, 275.071990966797),
                new V3d(5720.8759765625, 10634.0517578125, 290.489990234375),
                new V3d(5721.4921875, 10657.4775390625, 299.914001464844),
                new V3d(5721.494140625, 10657.50390625, 299.924011230469),
                new V3d(5721.494140625, 10603.6572265625, 299.924011230469),
                new V3d(5721.4921875, 10603.63671875, 299.912994384766),
                new V3d(5721.13623046875, 10594.4521484375, 294.463989257813),
                new V3d(5719.72802734375, 10568.3193359375, 272.963989257813),
                new V3d(5719.47607421875, 10564.873046875, 269.109008789063),
                new V3d(5719.47607421875, 10554.31640625, 269.109008789063),
                new V3d(5721.4921875, 10581.8486328125, 299.912994384766),
                new V3d(5721.494140625, 10581.859375, 299.924011230469),
                new V3d(5721.494140625, 10550.1767578125, 299.924011230469),
                new V3d(5719.51806640625, 10523.21484375, 269.760009765625),
                new V3d(5719.47607421875, 10522.423828125, 269.109008789063),
                new V3d(5719.47607421875, 10498.8857421875, 269.109008789063),
                new V3d(5719.93408203125, 10510.69140625, 276.111999511719),
                new V3d(5721.4912109375, 10539.62109375, 299.911987304688),
                new V3d(5721.4921875, 10581.8486328125, 299.912994384766),
                new V3d(5721.4921875, 10603.63671875, 299.912994384766),
                new V3d(5721.4921875, 10657.4775390625, 299.914001464844),
                new V3d(5721.4921875, 10785.8115234375, 299.915985107422),
                new V3d(5720.8759765625, 10809.2421875, 290.489990234375),
                new V3d(5719.8662109375, 10835.232421875, 275.071990966797),
                new V3d(5719.623046875, 10839.7490234375, 271.355010986328)
            };

            var mesh = new PolyMesh();

            foreach (var p in meshPoints)
            {
                mesh.AddVertex(p);
            }

            mesh.AddFace(0.UpToExclusive(meshPoints.Length).ToArray());

            var triangleMesh = mesh.TriangulatedCopy();

            // Requirement 1: should not crash

            // Requirement 2: valid polygon / TODO
            Assert.That(triangleMesh.FaceCount > 0);
        }