/*
 *
 *  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/
 *
 */

/////////////////////////////////////////////////////////////////////////////
//
// IfCondenser class: takes a scene graph produced by flattening a graph
// and condenses vertices and material indices, if possible, by
// removing duplicates.
//
// This assumes that flattening has produced an
// SoIndexedTriangleStripSet with lots of 1-triangle "strips", one
// for each triangle generated during flattening.
//
/////////////////////////////////////////////////////////////////////////////

#ifndef  _IF_CONDENSER_
#define  _IF_CONDENSER_

class IfHolder;
class SbDict;
class SoMFInt32;

class IfCondenser {

  public:
    IfCondenser();
    ~IfCondenser();

    void	condense(IfHolder *_holder);

  private:
    IfHolder		*holder;	// Holds most important stuff

    // Removes duplicate coordinates, normals, or texture coordinates,
    // updating the indices in the triangle shape.
    void		condenseCoordinates();
    void		condenseNormals();
    void		condenseTextureCoordinates();

    // Condenses the material indices if possible
    void		condenseMaterials();

    // Returns TRUE if the two sets of indices are the same
    SbBool		sameIndices(const SoMFInt32 *indexField1,
				    const SoMFInt32 *indexField2);
};

#endif /* _IF_CONDENSER_ */
