GeometryExporter.h

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributor(s): Chingiz Dyussenov, Arystanbek Dyussenov, Jan Diederich, Tod Liverseed,
 *                 Nathan Letwory
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef __GEOMETRYEXPORTER_H__
#define __GEOMETRYEXPORTER_H__

#include <string>
#include <vector>
#include <set>

#include "COLLADASWStreamWriter.h"
#include "COLLADASWLibraryGeometries.h"
#include "COLLADASWInputList.h"

#include "DNA_mesh_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"

#include "ExportSettings.h"

// TODO: optimize UV sets by making indexed list with duplicates removed
class GeometryExporter : COLLADASW::LibraryGeometries
{
    struct Face
    {
        unsigned int v1, v2, v3, v4;
    };

    struct Normal
    {
        float x, y, z;
    };

    Scene *mScene;

public:
    GeometryExporter(COLLADASW::StreamWriter *sw, const ExportSettings *export_settings);

    void exportGeom(Scene *sce);

    void operator()(Object *ob);

    // powerful because it handles both cases when there is material and when there's not
    void createPolylist(short material_index,
                        bool has_uvs,
                        bool has_color,
                        Object *ob,
                        std::string& geom_id,
                        std::vector<Face>& norind);
    
    // creates <source> for positions
    void createVertsSource(std::string geom_id, Mesh *me);

    void createVertexColorSource(std::string geom_id, Mesh *me);

    std::string makeTexcoordSourceId(std::string& geom_id, int layer_index);

    //creates <source> for texcoords
    void createTexcoordsSource(std::string geom_id, Mesh *me);

    //creates <source> for normals
    void createNormalsSource(std::string geom_id, Mesh *me, std::vector<Normal>& nor);

    void create_normals(std::vector<Normal> &nor, std::vector<Face> &ind, Mesh *me);
    
    std::string getIdBySemantics(std::string geom_id, COLLADASW::InputSemantic::Semantics type, std::string other_suffix = "");
    
    COLLADASW::URI getUrlBySemantics(std::string geom_id, COLLADASW::InputSemantic::Semantics type, std::string other_suffix = "");

    COLLADASW::URI makeUrl(std::string id);
    
    /* int getTriCount(MFace *faces, int totface);*/
private:
    std::set<std::string> exportedGeometry;
    
    const ExportSettings *export_settings;
};

struct GeometryFunctor {
    // f should have
    // void operator()(Object* ob)
    template<class Functor>
    void forEachMeshObjectInScene(Scene *sce, Functor &f, bool export_selected)
    {
        
        Base *base= (Base*) sce->base.first;
        while(base) {
            Object *ob = base->object;
            
            if (ob->type == OB_MESH && ob->data
                && !(export_selected && !(ob->flag && SELECT))
                && ((sce->lay & ob->lay)!=0)) {
                f(ob);
            }
            base= base->next;
            
        }
    }
};

#endif