PointMesh.hpp

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#pragma once
 
#include "MeshCRTP.hpp"
#include "Tuple.hpp"
 
#include <Eigen/Core>
 
namespace wmtk {
// Simple mesh without topology. Mainly useful for testing attributes without having to construct
// topologies
class PointMesh : public MeshCRTP<PointMesh>
{
private:
    Tuple vertex_tuple_from_id(int64_t id) const;
 
public:
    friend class MeshCRTP<PointMesh>;
    template <typename U, typename MeshType, int Dim>
    friend class attribute::Accessor;
    PointMesh();
    ~PointMesh() override;
    PointMesh(int64_t size);
    PointMesh(const PointMesh& o) = delete;
    PointMesh(PointMesh&& o) = default;
    PointMesh& operator=(const PointMesh& o) = delete;
    PointMesh& operator=(PointMesh&& o) = default;
 
    [[noreturn]] Tuple switch_tuple(const Tuple& tuple, PrimitiveType type) const override;
    bool is_ccw(const Tuple& tuple) const override;
    using Mesh::is_boundary;
    bool is_boundary(PrimitiveType pt, const Tuple& tuple) const override;
    bool is_boundary_vertex(const Tuple& tuple) const;
 
    void initialize(int64_t count);
 
 
    bool is_valid(const Tuple& tuple)
        const final override;
 
    bool is_connectivity_valid() const override { return true; }
 
    std::vector<std::vector<TypedAttributeHandle<int64_t>>> connectivity_attributes()
        const override;
 
    std::vector<Tuple> orient_vertices(const Tuple& tuple) const override;
 
protected:
    using MeshCRTP<PointMesh>::id; // getting the (simplex) prototype
    int64_t id(const Tuple& tuple, PrimitiveType type) const;
 
    Tuple tuple_from_id(const PrimitiveType type, const int64_t gid) const override;
};
 
inline int64_t PointMesh::id(const Tuple& tuple, PrimitiveType type) const
{
    switch (type) {
    case PrimitiveType::Vertex: return tuple.m_global_cid;
    case PrimitiveType::Edge:
    case PrimitiveType::Triangle:
    case PrimitiveType::Tetrahedron:
    default: assert(false); // "Tuple switch: Invalid primitive type"
    }
 
    return -1;
}
} // namespace wmtk