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93 lines
3 KiB
C++
93 lines
3 KiB
C++
/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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*/
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/*
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* jarcloc.h
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*
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* $Date$ $Revision: 1.1 $
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* $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/internals/jarcloc.h,v 1.1 2004/02/02 16:39:11 navaraf Exp $
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*/
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#ifndef __glujarcloc_h_
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#define __glujarcloc_h_
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#include "arc.h"
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class Jarcloc {
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private:
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Arc_ptr arc;
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TrimVertex *p;
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TrimVertex *plast;
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public:
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inline void init( Arc_ptr a, long first, long last ) { arc = a; p=&a->pwlArc->pts[first]; plast = &a->pwlArc->pts[last]; }
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inline TrimVertex * getnextpt( void );
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inline TrimVertex * getprevpt( void );
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inline void reverse();
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};
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inline void
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Jarcloc::reverse()
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{
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if( plast == &arc->pwlArc->pts[0] )
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plast = &arc->pwlArc->pts[arc->pwlArc->npts - 1];
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else
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plast = &arc->pwlArc->pts[0];
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}
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inline TrimVertex *
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Jarcloc::getnextpt()
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{
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assert( p <= plast );
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if( p == plast ) {
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arc = arc->next;
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p = &arc->pwlArc->pts[0];
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plast = &arc->pwlArc->pts[arc->pwlArc->npts - 1];
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assert( p < plast );
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}
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return p++;
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}
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inline TrimVertex *
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Jarcloc::getprevpt()
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{
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assert( p >= plast );
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if( p == plast ) {
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arc = arc->prev;
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p = &arc->pwlArc->pts[arc->pwlArc->npts - 1];
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plast = &arc->pwlArc->pts[0];
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assert( p > plast );
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}
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return p--;
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}
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#endif /* __glujarcloc_h_ */
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