2
This software may only be used by you under license from AT&T Corp.
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("AT&T"). A copy of AT&T's Source Code Agreement is available at
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AT&T's Internet website having the URL:
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<http://www.research.att.com/sw/tools/graphviz/license/source.html>
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If you received this software without first entering into a license
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with AT&T, you have an infringing copy of this software and cannot use
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it without violating AT&T's intellectual property rights.
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float a,b,c; /* edge on line ax + by = c */
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Site *ep[2]; /* endpoints (vertices) of edge; initially NULL */
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Site *reg[2]; /* sites forming edge */
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extern float pxmin, pxmax, pymin, pymax; /* clipping window */
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extern void edgeinit(void);
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extern void endpoint(Edge*, int, Site*);
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extern void clip_line(Edge *e);
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extern Edge *bisect(Site*, Site*);