xref: /xsrc/external/mit/glu/dist/src/libnurbs/internals/hull.h

/*
 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice including the dates of first publication and
 * either this permission notice or a reference to
 * http://oss.sgi.com/projects/FreeB/
 * shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Except as contained in this notice, the name of Silicon Graphics, Inc.
 * shall not be used in advertising or otherwise to promote the sale, use or
 * other dealings in this Software without prior written authorization from
 * Silicon Graphics, Inc.
 */

/*
 * hull.h
 *
 */

#ifndef __gluhull_h_
#define __gluhull_h_

#include "trimline.h"
#include "trimregion.h"
#include "trimvertex.h"
#include "gridtrimvertex.h"

struct Gridline;
class Uarray;

class Hull : virtual public TrimRegion {
public:
    			Hull( void );
    			~Hull( void );
    void		init( void );
    GridTrimVertex *	nextlower( GridTrimVertex * );
    GridTrimVertex *	nextupper( GridTrimVertex * );
private:
    struct Side {
	Trimline 	*left;
	Gridline     	*line;
	Trimline 	*right;
	long 		index;
    };

    Side 		lower;
    Side		upper;
    Trimline 		fakeleft;
    Trimline		fakeright;
};


#endif /* __gluhull_h_ */