PlaneSet.h

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/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).  

Doom 3 Source Code 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 3 of the License, or
(at your option) any later version.

Doom 3 Source Code 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 Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#ifndef __PLANESET_H__
#define __PLANESET_H__

/*
===============================================================================

        Plane Set

===============================================================================
*/

class idPlaneSet : public idList<idPlane> {
public:

        void                                    Clear( void ) { idList<idPlane>::Clear(); hash.Free(); }

        int                                             FindPlane( const idPlane &plane, const float normalEps, const float distEps );

private:
        idHashIndex                             hash;
};

ID_INLINE int idPlaneSet::FindPlane( const idPlane &plane, const float normalEps, const float distEps ) {
        int i, border, hashKey;

        assert( distEps <= 0.125f );

        hashKey = (int)( idMath::Fabs( plane.Dist() ) * 0.125f );
        for ( border = -1; border <= 1; border++ ) {
                for ( i = hash.First( hashKey + border ); i >= 0; i = hash.Next( i ) ) {
                        if ( (*this)[i].Compare( plane, normalEps, distEps ) ) {
                                return i;
                        }
                }
        }

        if ( plane.Type() >= PLANETYPE_NEGX && plane.Type() < PLANETYPE_TRUEAXIAL ) {
                Append( -plane );
                hash.Add( hashKey, Num()-1 );
                Append( plane );
                hash.Add( hashKey, Num()-1 );
                return ( Num() - 1 );
        }
        else {
                Append( plane );
                hash.Add( hashKey, Num()-1 );
                Append( -plane );
                hash.Add( hashKey, Num()-1 );
                return ( Num() - 2 );
        }
}

#endif /* !__PLANESET_H__ */