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/*
* $Id: clip.h,v 1.1 2005-09-18 22:04:25 dhmunro Exp $
* Routines to perform floating point clipping operations.
*/
/* Copyright (c) 2005, The Regents of the University of California.
* All rights reserved.
* This file is part of yorick (http://yorick.sourceforge.net).
* Read the accompanying LICENSE file for details.
*/
/*
Interface routines:
*** include "clip.h" to define xClip, yClip ***
int nc;
ClipSetup(xmin, xmax, ymin, ymax);
*** to draw an open curve, use ***
if (ClipBegin(x, y, n, 0)) DrawPolyline(x, y, n);
else while (nc=ClipMore()) DrawPolyline(xClip, yClip, nc);
*** to draw a closed curve, use ***
if (ClipBegin(x, y, n, 1)) DrawPolygon(x, y, n);
else while (nc=ClipMore()) DrawPolyline(xClip, yClip, nc);
*** to draw a set of unconnected points, use ***
if (nc=ClipPoints(x, y, n)) DrawPolymarker(xClip, yClip, nc);
*** to draw a closed filled curve, use ***
if (nc=ClipFilled(x, y, n)) DrawFilledPolygon(xClip, yClip, nc);
*** to draw a disjoint segments, use ***
if (nc=ClipDisjoint(x0, y0, x1, y1, n))
DrawDisjoint(xClip, yClip, xClip1, yClip1, nc);
*/
#ifndef CLIP_H
#define CLIP_H
#ifndef GIST_H
#ifndef SINGLE_P
typedef double GpReal;
#else
typedef float GpReal;
#endif
#endif
extern GpReal *xClip, *yClip, *xClip1, *yClip1;
extern void ClipFreeWS(void);
extern void ClipSetup(GpReal xmn, GpReal xmx, GpReal ymn, GpReal ymx);
extern int ClipBegin(const GpReal* xx, const GpReal* yy, int nn, int clsd);
extern int ClipMore(void);
extern int ClipPoints(const GpReal* xx, const GpReal* yy, int nn);
extern int ClipFilled(const GpReal* xx, const GpReal* yy, int nn);
extern int ClipDisjoint(const GpReal* x0, const GpReal* y0,
const GpReal* x1, const GpReal* y1, int nn);
extern int ClipTest(const GpReal* xx, const GpReal* yy, int nn, int clsd,
const GpReal* box);
#endif
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