mesh_utils.hpp

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#pragma once
 
#include <wmtk/Mesh.hpp>
 
#include <string>
 
namespace wmtk::mesh_utils {
template <typename Mat>
inline attribute::MeshAttributeHandle set_matrix_attribute(
    const Mat& data,
    const std::string& name,
    const PrimitiveType& type,
    Mesh& mesh)
{
    attribute::MeshAttributeHandle handle =
        mesh.template register_attribute<typename Mat::Scalar>(name, type, data.cols());
 
 
    auto thandle = handle.as<typename Mat::Scalar>();
 
    auto accessor = mesh.create_accessor(thandle);
    const auto tuples = mesh.get_all(type);
    for (size_t i = 0; i < tuples.size(); ++i) {
        const auto& t = tuples[i];
        accessor.vector_attribute(t) = data.row(i).transpose();
    }
 
    return handle;
}
 
Eigen::Vector3d
compute_face_normal_area_weighted(const TriMesh& m, const attribute::Accessor<double>& pos, const Tuple& f);
 
Eigen::Vector3d compute_face_normal(const TriMesh& m, const attribute::Accessor<double>& pos, const Tuple& f);
 
Eigen::Vector3d
compute_vertex_normal(const TriMesh& m, const attribute::Accessor<double>& pos, const Tuple& v);
 
} // namespace wmtk::mesh_utils