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/* This file contains the box method, which is a standard part of libplot.
It draws an object: an upright rectangle with diagonal corners x0,y0 and
x1,y1.
In this generic version, we simply call fmove() and fcont() repeatedly,
to draw the box. */
#include "sys-defines.h"
#include "plot.h"
#include "extern.h"
int
#ifdef _HAVE_PROTOS
_g_fbox (double x0, double y0, double x1, double y1)
#else
_g_fbox (x0, y0, x1, y1)
double x0, y0, x1, y1;
#endif
{
double xnew, ynew;
if (!_plotter->open)
{
_plotter->error ("fbox: invalid operation");
return -1;
}
_plotter->fmove (x0, y0);
_plotter->fcont (x0, y1);
_plotter->fcont (x1, y1);
_plotter->fcont (x1, y0);
_plotter->fcont (x0, y0);
/* move to center (libplot convention) */
xnew = 0.5 * (x0 + x1);
ynew = 0.5 * (y0 + y1);
_plotter->fmove (xnew, ynew);
return 0;
}
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