Modified version of lib3ds reader of .3ds format

#ifndef ILIB3DS_STAGE_H
#define ILIB3DS_STAGE_H

#include "lib3ds_types/Lib3ds_Shadow_type.h"
#include "lib3ds_types/Lib3ds_Background_type.h"
#include "lib3ds_types/Lib3ds_Atmosphere_type.h"
#include "lib3ds_types/Lib3ds_Viewport_type.h"
#include "lib3ds_types/Lib3ds_Material_type.h"
#include "lib3ds_types/Lib3ds_Camera_type.h"
#include "lib3ds_types/Lib3ds_Light_type.h"
#include "lib3ds_types/Lib3ds_Mesh_type.h"
#include "lib3ds_types/Lib3ds_Node_type.h"

#include <QMap>
#include <QList>

class ILib3ds_stage
{
public:

    QString             name; // Name of stage
    unsigned            user_id;
    void*               user_ptr;
    unsigned            mesh_version; // Version of mesh
    unsigned            keyf_revision; // Version of keys of Animation    
    float               master_scale; // Main Scale for whole scage
    float               construction_plane[3];
    float               ambient[3];
    Lib3dsShadow        shadow; // Configuration of the shadow
    Lib3dsBackground    background; // Configuration of the background
    Lib3dsAtmosphere    atmosphere;
    Lib3dsViewport      viewport;
    Lib3dsViewport      viewport_keyf;
    int                 frames;
    int                 segment_from;
    int                 segment_to;
    int                 current_frame;
    int                 materials_size;
    int                 nmaterials;
    QMap<QString, Lib3dsMaterial> materials;
    int                 cameras_size;
    int                 ncameras;
    QMap<QString, Lib3dsCamera> cameras;
    int                 lights_size;
    int                 nlights;
    QMap<QString, Lib3dsLight> lights;
    int                 meshes_size;
    int                 nmeshes;
    QMap<QString, Lib3dsMesh> meshes;
    QList<Lib3dsNode> nodes;

    virtual void lib3ds_stage_eval(float t)=0;

    virtual void lib3ds_matrix_copy(float dest[4][4], float src[4][4])=0; // Function of coping of matrix

    virtual int lib3ds_matrix_inv(float m[4][4])=0; // Function of Inverting a matrix in place.

    virtual void lib3ds_stage_bounding_box_of_nodes(int include_meshes, int include_cameras,
                                            int include_lights, float bmin[3],
                                            float bmax[3], float matrix[4][4])=0;

    virtual void lib3ds_mesh_calculate_vertex_normals(Lib3dsMesh *mesh, float (*normals)[3])=0; // Function of Calculates the vertex normals corresponding to the smoothing group
};


#endif // ILIB3DS_STAGE_H