surface_mesh_fairing.h

/********************************************************************
 * Copyright (C) 2020-2021 by Liangliang Nan <liangliang.nan@gmail.com>
 * Copyright (C) 2011-2020 the Polygon Mesh Processing Library developers.
 *
 * The code in this file is adapted from the PMP (Polygon Mesh Processing
 * Library) with modifications.
 *      https://github.com/pmp-library/pmp-library
 * The original code was distributed under a MIT-style license, see
 *      https://github.com/pmp-library/pmp-library/blob/master/LICENSE.txt
 ********************************************************************/
 
#ifndef EASY3D_ALGO_SURFACE_MESH_FAIRING_H
#define EASY3D_ALGO_SURFACE_MESH_FAIRING_H
 
#include <map>
#include <easy3d/core/surface_mesh.h>
 
namespace easy3d {

    class SurfaceMeshFairing {
    public:
        explicit SurfaceMeshFairing(SurfaceMesh *mesh);

        ~SurfaceMeshFairing();

        void minimize_area() { fair(1); }

        void minimize_curvature() { fair(2); }

        void fair(unsigned int k = 2);
 
    private:
        void setup_matrix_row(SurfaceMesh::Vertex v, SurfaceMesh::VertexProperty<double> vweight,
                              SurfaceMesh::EdgeProperty<double> eweight,
                              unsigned int laplace_degree,
                              std::map<SurfaceMesh::Vertex, double> &row);
 
    private:
        SurfaceMesh *mesh_; 
 
        // property handles
        SurfaceMesh::VertexProperty <vec3> points_;
        SurfaceMesh::VertexProperty<bool> vselected_;
        SurfaceMesh::VertexProperty<bool> vlocked_;
        SurfaceMesh::VertexProperty<double> vweight_;
        SurfaceMesh::EdgeProperty<double> eweight_;
        SurfaceMesh::VertexProperty<int> idx_;
    };
 
 
} // namespace easy3d
 
#endif  // EASY3D_ALGO_SURFACE_MESH_FAIRING_H