separate_by_facet_groups.h

/*
 * Copyright 2023 Adobe. All rights reserved.
 * This file is licensed to you under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. You may obtain a copy
 * of the License at http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under
 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
 * OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
#pragma once
 
#include <lagrange/SurfaceMesh.h>
#include <lagrange/utils/function_ref.h>
#include <lagrange/utils/invalid.h>
#include <lagrange/utils/span.h>
 
#include <string_view>
 
namespace lagrange {


struct SeparateByFacetGroupsOptions
{
    std::string_view source_vertex_attr_name;

    std::string_view source_facet_attr_name;

    bool map_attributes = false;
 
    SeparateByFacetGroupsOptions() = default;
    SeparateByFacetGroupsOptions(const SeparateByFacetGroupsOptions&) = default;
    SeparateByFacetGroupsOptions(SeparateByFacetGroupsOptions&&) = default;
    SeparateByFacetGroupsOptions& operator=(const SeparateByFacetGroupsOptions&) = default;
    SeparateByFacetGroupsOptions& operator=(SeparateByFacetGroupsOptions&&) = default;

    template <typename T>
    explicit SeparateByFacetGroupsOptions(const T& options)
    {
        source_vertex_attr_name = options.source_vertex_attr_name;
        source_facet_attr_name = options.source_facet_attr_name;
        map_attributes = options.map_attributes;
    }
};

template <typename Scalar, typename Index>
std::vector<SurfaceMesh<Scalar, Index>> separate_by_facet_groups(
    const SurfaceMesh<Scalar, Index>& mesh,
    size_t num_groups,
    span<const Index> facet_group_indices,
    const SeparateByFacetGroupsOptions& options = {});

template <typename Scalar, typename Index>
std::vector<SurfaceMesh<Scalar, Index>> separate_by_facet_groups(
    const SurfaceMesh<Scalar, Index>& mesh,
    span<const Index> facet_group_indices,
    const SeparateByFacetGroupsOptions& options = {});

template <typename Scalar, typename Index>
std::vector<SurfaceMesh<Scalar, Index>> separate_by_facet_groups(
    const SurfaceMesh<Scalar, Index>& mesh,
    size_t num_groups,
    function_ref<Index(Index)> get_facet_group,
    const SeparateByFacetGroupsOptions& options = {});

 
} // namespace lagrange