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Initial revision

/*
 *
 *  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/
 *
 */

//  -*- C++ -*-

/*
 * Copyright (C) 1990-93   Silicon Graphics, Inc.
 *
 _______________________________________________________________________
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 |
 |   $Revision: 1.1 $
 |
 |   Description:
 |	Downgrade from 2.0 ShapeHints format to the 1.0 format
 |
 |   Author(s): Gavin Bell, David Mott
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */

#ifndef  _SO_V1SHAPEHINTS_
#define  _SO_V1SHAPEHINTS_

#include <Inventor/nodes/SoSubNode.h>
#include <Inventor/fields/SoSFBitMask.h>
#include <Inventor/fields/SoSFFloat.h>

class SoShapeHints;

//////////////////////////////////////////////////////////////////////////////
//
//  Class: SoShapeHintsV1
//
//  V1ShapeHints for upgrading 1.0 ShapeHintss to the 2.0 file format.
//
//////////////////////////////////////////////////////////////////////////////

class SoShapeHintsV1 : public SoNode {

    SO_NODE_HEADER(SoShapeHintsV1);

  public:
    enum Hint {				// Hint flags

	// These flags give useful optimization hints:
	SOLID		= 0x01,			// Closed solid
	ORDERED		= 0x02,			// Vertices are ordered
	CONVEX		= 0x04,			// All faces are convex

	// These flags counteract those hints and are provided for
	// completeness in user specifications:
	SURFACE		= 0x00,			// Not solid
	UNORDERED	= 0x00,			// Not ordered
	CONCAVE		= 0x00 			// Not convex
    };

    // Fields
    SoSFBitMask		hints;		// Shape hints
    SoSFFloat		creaseAngle;	// smallest angle for sharp edge

    // Constructor
    SoShapeHintsV1();

    // Copy fields from a 2.0 node to this 1.0 node
    static SoNode *	downgrade(SoShapeHints *shints2);

  SoINTERNAL public:
    static void		initClass();
};

#endif /* _SO_V1SHAPEHINTS_ */