MeVis/ThirdParty/Sources/Inventor/inventor/lib/database/include/Inventor/misc/SoCompactPathList.h

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/*
 *
 *  Copyright (C) 2000 Silicon Graphics, Inc.  All Rights Reserved. 
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  Further, this software is distributed without any warranty that it is
 *  free of the rightful claim of any third person regarding infringement
 *  or the like.  Any license provided herein, whether implied or
 *  otherwise, applies only to this software file.  Patent licenses, if
 *  any, provided herein do not apply to combinations of this program with
 *  other software, or any other product whatsoever.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 *  Mountain View, CA  94043, or:
 * 
 *  http://www.sgi.com 
 * 
 *  For further information regarding this notice, see: 
 * 
 *  http://oss.sgi.com/projects/GenInfo/NoticeExplan/
 *
 */


/*
 * Copyright (C) 1990,91   Silicon Graphics, Inc.
 *
 _______________________________________________________________________
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 |
 |   $Revision: 1.1.1.1 $
 |
 |   Description:
 |      This file contains the definition of the SoCompactPathList class.
 |
 |   Author(s)          : Paul S. Strauss
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */


#ifndef  _SO_COMPACT_PATH_LIST_
#define  _SO_COMPACT_PATH_LIST_

#include <Inventor/SoLists.h>


SoINTERNAL class INVENTOR_API SoCompactPathList {

  public:
    SoCompactPathList(const SoPathList &list);
    ~SoCompactPathList();

    void                reset();

    void                getChildren(int &numIndices, const int *&indices);

    SbBool              push(int childIndex);

    void                pop();

  private:
    int                 *array;         
    int                 curNode;        
    int                 *stack;         
    int                 stackDepth;     

    int                 getNumIndices() { return array[curNode]; }

    int                 getStartIndex() { return curNode + 1; }

    int                 getChild(int i)
        { return array[getStartIndex() + getNumIndices() + i]; }

    void                pushCurNode()   { stack[stackDepth++] = curNode; }

    void                popCurNode()    { curNode = stack[--stackDepth - 1]; }

    int                 computeArraySize(const SoPathList &list);

    int                 compactPaths(int curSlot, int depth,
                                     const SoPathList &list,
                                     int firstPath, int numPaths);
};

#endif /* _SO_COMPACT_PATH_LIST_ */