1*9ba83ac0SJeremy L Thompson // Copyright (c) 2017-2026, Lawrence Livermore National Security, LLC and other CEED contributors. 23eb59678SJeremy L Thompson // All Rights Reserved. See the top-level LICENSE and NOTICE files for details. 33eb59678SJeremy L Thompson // 43eb59678SJeremy L Thompson // SPDX-License-Identifier: BSD-2-Clause 53eb59678SJeremy L Thompson // 63eb59678SJeremy L Thompson // This file is part of CEED: http://github.com/ceed 73eb59678SJeremy L Thompson 83eb59678SJeremy L Thompson // ---------------------------------------------------------------------------- 93eb59678SJeremy L Thompson // Transform mesh coordinates 103eb59678SJeremy L Thompson // ---------------------------------------------------------------------------- 113eb59678SJeremy L Thompson pub(crate) fn transform_mesh_coordinates( 123eb59678SJeremy L Thompson dim: usize, 133eb59678SJeremy L Thompson mesh_coords: &mut libceed::Vector, 143eb59678SJeremy L Thompson ) -> libceed::Result<libceed::Scalar> { 153eb59678SJeremy L Thompson // Transform coordinates 163eb59678SJeremy L Thompson for coord in mesh_coords.view_mut()?.iter_mut() { 173eb59678SJeremy L Thompson // map [0,1] to [0,1] varying the mesh density 183eb59678SJeremy L Thompson *coord = 0.5 193eb59678SJeremy L Thompson + 1.0 / (3.0 as libceed::Scalar).sqrt() 203eb59678SJeremy L Thompson * ((2.0 / 3.0) * std::f64::consts::PI as libceed::Scalar * (*coord - 0.5)).sin() 213eb59678SJeremy L Thompson } 223eb59678SJeremy L Thompson 233eb59678SJeremy L Thompson // Exact surface area of transformed region 243eb59678SJeremy L Thompson let exact_area = match dim { 253eb59678SJeremy L Thompson 1 => 2.0, 263eb59678SJeremy L Thompson 2 => 4.0, 273eb59678SJeremy L Thompson 3 => 6.0, 283eb59678SJeremy L Thompson _ => unreachable!(), 293eb59678SJeremy L Thompson }; 303eb59678SJeremy L Thompson Ok(exact_area) 313eb59678SJeremy L Thompson } 323eb59678SJeremy L Thompson 333eb59678SJeremy L Thompson // ---------------------------------------------------------------------------- 34