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/* This file contains the arcrel() method, which is a GNU extension to
libplot. arcrel() is simply a version of arc() that uses relative
coordinates. It draws an object: a counterclockwise arc with specified
center, beginning, and end. */
#include "sys-defines.h"
#include "plot.h"
#include "extern.h"
int
#ifdef _HAVE_PROTOS
_m_arcrel (int xc, int yc, int x0, int y0, int x1, int y1)
#else
_m_arcrel (xc, yc, x0, y0, x1, y1)
int xc, yc, x0, y0, x1, y1;
#endif
{
if (!_plotter->open)
{
_plotter->error ("arcrel: invalid operation");
return -1;
}
if (_plotter->outstream)
{
if (_plotter->portable_output)
fprintf (_plotter->outstream, "%c %d %d %d %d %d %d\n",
ARCREL, xc, yc, x0, y0, x1, y1);
else
{
putc (ARCREL, _plotter->outstream);
_emit_integer (xc);
_emit_integer (yc);
_emit_integer (x0);
_emit_integer (y0);
_emit_integer (x1);
_emit_integer (y1);
}
}
return 0;
}
int
#ifdef _HAVE_PROTOS
_m_farcrel (double xc, double yc, double x0, double y0, double x1, double y1)
#else
_m_farcrel (xc, yc, x0, y0, x1, y1)
double xc, yc, x0, y0, x1, y1;
#endif
{
if (!_plotter->open)
{
_plotter->error ("farcrel: invalid operation");
return -1;
}
if (_plotter->outstream == NULL)
return 0;
if (_plotter->portable_output)
fprintf (_plotter->outstream, "%c %g %g %g %g %g %g\n",
ARCREL, xc, yc, x0, y0, x1, y1);
else
{
putc (FARCREL, _plotter->outstream);
_emit_float (xc);
_emit_float (yc);
_emit_float (x0);
_emit_float (y0);
_emit_float (x1);
_emit_float (y1);
}
return 0;
}
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