monotonizer.h

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/**************************************************************************
 *                                    *
 *       Copyright (C) 1999, Silicon Graphics, Inc.       *
 *                                    *
 *  These coded instructions, statements, and computer programs  contain  *
 *  unpublished  proprietary  information of Silicon Graphics, Inc., and  *
 *  are protected by Federal copyright law.  They  may  not be disclosed  *
 *  to  third  parties  or copied or duplicated in any form, in whole or  *
 *  in part, without the prior written consent of Silicon Graphics, Inc.  *
 *                                    *
 **************************************************************************/

/*
 * monotonizer.h
 *
 * $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/internals/monotonizer.h,v 1.1 2004/02/02 16:39:12 navaraf Exp $
 */

#ifndef __glumonotonizer_h_
#define __glumonotonizer_h_

#include "mysetjmp.h"
#include "types.h"

class Arc;
class ArcTessellator;
class Pool;
class Bin;
class PwlArcPool;
class Mapdesc;

class Monotonizer {
    ArcTessellator& arctessellator;
    Pool&       arcpool;
    Pool&       pwlarcpool;
    jmp_buf&        nurbsJmpBuf;

    enum dir        { down, same, up, none };
    void        tessellate( Arc *, REAL );
    void        monotonize( Arc *, Bin & );
    int         isMonotone( Arc * );
public:
                Monotonizer( ArcTessellator& at, Pool& ap, Pool& p, jmp_buf& j )
                : arctessellator(at), arcpool(ap), pwlarcpool(p), nurbsJmpBuf(j) {}
    int         decompose( Bin &, REAL );
};
#endif /* __glumonotonizer_h_ */