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Diffstat (limited to 'src/glu/sgi/libnurbs/internals/jarcloc.h')
| -rw-r--r-- | src/glu/sgi/libnurbs/internals/jarcloc.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/glu/sgi/libnurbs/internals/jarcloc.h b/src/glu/sgi/libnurbs/internals/jarcloc.h new file mode 100644 index 00000000000..785234f6c08 --- /dev/null +++ b/src/glu/sgi/libnurbs/internals/jarcloc.h @@ -0,0 +1,93 @@ +/* +** License Applicability. Except to the extent portions of this file are +** made subject to an alternative license as permitted in the SGI Free +** Software License B, Version 1.1 (the "License"), the contents of this +** file are subject only to the provisions of the License. You may not use +** this file except in compliance with the License. You may obtain a copy +** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 +** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: +** +** http://oss.sgi.com/projects/FreeB +** +** Note that, as provided in the License, the Software is distributed on an +** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS +** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND +** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A +** PARTICULAR PURPOSE, AND NON-INFRINGEMENT. +** +** Original Code. The Original Code is: OpenGL Sample Implementation, +** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, +** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. +** Copyright in any portions created by third parties is as indicated +** elsewhere herein. All Rights Reserved. +** +** Additional Notice Provisions: The application programming interfaces +** established by SGI in conjunction with the Original Code are The +** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released +** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version +** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X +** Window System(R) (Version 1.3), released October 19, 1998. This software +** was created using the OpenGL(R) version 1.2.1 Sample Implementation +** published by SGI, but has not been independently verified as being +** compliant with the OpenGL(R) version 1.2.1 Specification. +*/ + +/* + * 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_ */ |