zone_symmetrisation.h

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/* Copyright, 2000-2002 Nevrax Ltd.
 *
 * This file is part of NEVRAX NEL.
 * NEVRAX NEL 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, or (at your option)
 * any later version.

 * NEVRAX NEL 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 NEVRAX NEL; see the file COPYING. If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA 02111-1307, USA.
 */

#ifndef NL_ZONE_SYMMETRISATION_H
#define NL_ZONE_SYMMETRISATION_H

#include "nel/misc/types_nl.h"
#include "nel/3d/patchuv_locator.h"
#include "nel/3d/patch.h"


namespace NL3D
{

struct CPatchInfo;
class CTileBank;

class CZoneSymmetrisation
{
public:

    enum TState
    {
        Nothing     =0,
        Regular     =1,
        Goofy       =2,
    };

    class CError
    {
    public:
        std::vector<std::string>    Errors;
    };

    CZoneSymmetrisation ();

    TState getTileState (uint patch, uint tile, uint layer) const;

    TState getTileBorderState (uint patch, uint tile) const;

    TState getOrientedTileBorderState (uint patch, uint tile) const;

    bool getOrientedTileCorner (uint patch, uint tile);

    bool build (const std::vector<CPatchInfo> &patchInfo, float snapCell, float weldThreshold, const CTileBank &bank, CError &errorDesc, const NLMISC::CMatrix &toOriginalSpace);

private:

    bool propagateTileState (uint i, uint s, uint t, const std::vector<CPatchInfo> &patchInfo, const CTileBank &bank, bool forceRegular);

    void setTileState (uint patch, uint tile, uint layer, TState state);

    void setTileBorderState (uint patch, uint tile, TState state);

    void setOrientedTileBorderState (uint patch, uint tile, TState state);

    void setOrientedTileCorner (uint patch, uint tile, bool corner);

    bool setTileState (const NL3D::CPatchInfo &patch, uint patchId, float snapCell, float weldThreshold, TState &state, const NLMISC::CMatrix &toOriginalSpace, const CTileBank &bank);
    bool setOrientedTileState (const NL3D::CPatchInfo &patch, uint patchId, float snapCell, float weldThreshold, TState &state, const NLMISC::CMatrix &toOriginalSpace, const CTileBank &bank);

    // Snap a position on the grid
    static bool snapOnGrid (float& value, float resolution, float snap);

private:

    // The patch state array
    std::vector<std::vector<uint16> >   _TilesLayerStates;
};


} // NL3D


#endif // NL_ZONE_SYMMETRISATION_H

/* End of zone_symmetrisation.h */