public unsafe Point3[][] Contours
        {
            set
            {
                //Point3*[] ps = new Point3*[value.Length];
                //uint[] lengths = new uint[value.Length];
                //GCHandle[] handles = new GCHandle[value.Length];
                float[] identityMatrix = new float[16];
                identityMatrix[0] = identityMatrix[5] = identityMatrix[10] = identityMatrix[15] = 1;
                SetContours(value, identityMatrix);

                /*
                for (int i = 0; i < value.Length; i++)
                {
                    // Don't do this at home...
                    handles[i] = GCHandle.Alloc(value[i]);
                    fixed (Point3* p = value[i])
                    {
                        ps[i] = p;
                        lengths[i] = (uint)value[i].Length;
                    }
                }
                fixed (Point3** psp = ps)
                {
                    NativeMethods.SetContours(context.ptr, id, psp, lengths, (uint)value.Length, identityMatrix, ref err);
                }
                foreach (var handle in handles)
                {
                    handle.Free();
                }
                NativeMethods.check(err);
                */
            }
        }