stl_occ_mesh.h

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/****************************************************************************
** gmio
** Copyright Fougue (24 Jun. 2016)
** contact@fougue.pro
**
** This software is a reusable library whose purpose is to provide complete
** I/O support for various CAD file formats (eg. STL)
**
** This software is governed by the CeCILL-B license under French law and
** abiding by the rules of distribution of free software.  You can  use,
** modify and/ or redistribute the software under the terms of the CeCILL-B
** license as circulated by CEA, CNRS and INRIA at the following URL
** "http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.html".
****************************************************************************/

#ifndef __cplusplus
#  error C++ compiler required
#endif

#ifndef GMIO_SUPPORT_STL_OCC_MESH_H
#define GMIO_SUPPORT_STL_OCC_MESH_H

#include "support_global.h"
#include "../gmio_stl/stl_mesh.h"
#include "../gmio_stl/stl_mesh_creator.h"

#include <vector>

#include <BRepBuilderAPI_CellFilter.hxx>
#include <BRepBuilderAPI_VertexInspector.hxx>
#include <StlMesh_Mesh.hxx>
#include <StlMesh_MeshTriangle.hxx>
#include <TColgp_SequenceOfXYZ.hxx>

struct gmio_stl_mesh_occmesh : public gmio_stl_mesh
{
    gmio_stl_mesh_occmesh();
    explicit gmio_stl_mesh_occmesh(const StlMesh_Mesh* mesh);
    explicit gmio_stl_mesh_occmesh(const Handle_StlMesh_Mesh& hnd);

    inline const StlMesh_Mesh* mesh() const { return m_mesh; }

private:
    static void get_triangle(
            const void* cookie, uint32_t tri_id, gmio_stl_triangle* tri);

    void init_C_members();
    void init_cache();

    struct domain_data {
        std::vector<const gp_XYZ*> vec_coords;
    };

    struct triangle_data {
        const StlMesh_MeshTriangle* ptr_triangle;
        const domain_data* ptr_domain;
    };

    const StlMesh_Mesh* m_mesh;
    std::vector<domain_data> m_vec_domain_data;
    std::vector<triangle_data> m_vec_triangle_data;
};

struct gmio_stl_mesh_creator_occmesh : public gmio_stl_mesh_creator
{
    gmio_stl_mesh_creator_occmesh();
    explicit gmio_stl_mesh_creator_occmesh(StlMesh_Mesh* mesh);
    explicit gmio_stl_mesh_creator_occmesh(const Handle_StlMesh_Mesh& hnd);

    inline StlMesh_Mesh* mesh() const { return m_mesh; }

private:
    static void begin_solid(
            void* cookie, const struct gmio_stl_mesh_creator_infos* infos);
    static void add_triangle(
            void* cookie, uint32_t tri_id, const gmio_stl_triangle* tri);

    void init_C_members();
    int add_unique_vertex(const gmio_vec3f& v);

    StlMesh_Mesh* m_mesh;
    BRepBuilderAPI_CellFilter m_filter;
    BRepBuilderAPI_VertexInspector m_inspector;
};

#endif /* GMIO_SUPPORT_STL_OCC_MESH_H */