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46 lines
1.4 KiB
46 lines
1.4 KiB
#ifndef __glutrimvertex_h_
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#define __glutrimvertex_h_
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/**************************************************************************
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* *
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* Copyright (C) 1992, Silicon Graphics, Inc. *
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* *
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* These coded instructions, statements, and computer programs contain *
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* unpublished proprietary information of Silicon Graphics, Inc., and *
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* are protected by Federal copyright law. They may not be disclosed *
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* to third parties or copied or duplicated in any form, in whole or *
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* in part, without the prior written consent of Silicon Graphics, Inc. *
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* *
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**************************************************************************/
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/*
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* trimvertex.h - $Revision: 1.2 $
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*/
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#include "types.h"
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/*#define USE_OPTTT*/
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#ifdef NT
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class TrimVertex { public: /* a vertex on a trim curve */
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#else
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struct TrimVertex { /* a vertex on a trim curve */
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#endif
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REAL param[2]; /* parametric space coords */
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#ifdef USE_OPTTT
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REAL cache_point[4]; //only when USE_OPTTT is on in slicer.c++
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REAL cache_normal[3];
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#endif
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long nuid;
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};
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typedef TrimVertex *TrimVertex_p;
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inline REAL
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det3( TrimVertex *a, TrimVertex *b, TrimVertex *c )
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{
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return a->param[0] * (b->param[1]-c->param[1]) +
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b->param[0] * (c->param[1]-a->param[1]) +
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c->param[0] * (a->param[1]-b->param[1]);
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}
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#endif /* __glutrimvertex_h_ */
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