API Reference > geometry-core > CartesianGeometry > Point3dArray > evaluateTrilinearDerivativeTransform evaluateTrilinearDerivativeTransform MethodStatic Compute a point and derivatives wrt uvw by trilinear mapping. evaluated point is the point part of the transform u,v,w derivatives are the respective columns of the matrix part of the transform. evaluateTrilinearDerivativeTransform(points: Point3d[], u: number, v: number, w: number, result?: Transform): Transform Parameter Type Description points Point3d[] array of 8 points at corners, with x index varying fastest. u number v number w number result Transform optional result transform Returns - Transform Defined in core/geometry/src/geometry3d/PointHelpers.ts Line 435 Last Updated: 13 June, 2024