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/*
* 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.
*/
/*
* jarcloc.h
*
* $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
* $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/jarcloc.h,v 1.1 2001/03/17 00:25:41 brianp Exp $
*/
#ifndef __glujarcloc_h_
#define __glujarcloc_h_
#include "arc.h"
class Jarcloc {
private:
Arc_ptr arc;
TrimVertex *p;
TrimVertex *plast;
public:
inline void init( Arc_ptr a, long first, long last ) { arc = a; p=&a->pwlArc->pts[first]; plast = &a->pwlArc->pts[last]; }
inline TrimVertex * getnextpt( void );
inline TrimVertex * getprevpt( void );
inline void reverse();
};
inline void
Jarcloc::reverse()
{
if( plast == &arc->pwlArc->pts[0] )
plast = &arc->pwlArc->pts[arc->pwlArc->npts - 1];
else
plast = &arc->pwlArc->pts[0];
}
inline TrimVertex *
Jarcloc::getnextpt()
{
assert( p <= plast );
if( p == plast ) {
arc = arc->next;
p = &arc->pwlArc->pts[0];
plast = &arc->pwlArc->pts[arc->pwlArc->npts - 1];
assert( p < plast );
}
return p++;
}
inline TrimVertex *
Jarcloc::getprevpt()
{
assert( p >= plast );
if( p == plast ) {
arc = arc->prev;
p = &arc->pwlArc->pts[arc->pwlArc->npts - 1];
plast = &arc->pwlArc->pts[0];
assert( p > plast );
}
return p--;
}
#endif /* __glujarcloc_h_ */
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