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/* The internal point-drawing function, which point() is a wrapper around.
It draws a point at the current location. There is no standard
definition of `point', so any Plotter is free to implement this as it
sees fit. */
#include "sys-defines.h"
#include "extern.h"
void
#ifdef _HAVE_PROTOS
_r_paint_point (S___(Plotter *_plotter))
#else
_r_paint_point (S___(_plotter))
S___(Plotter *_plotter;)
#endif
{
double xx, yy;
int ixx, iyy;
if (_plotter->drawstate->pen_type != 0)
/* have a pen to draw with */
{
/* convert point to floating-point device coordinates */
xx = XD(_plotter->drawstate->pos.x, _plotter->drawstate->pos.y);
yy = YD(_plotter->drawstate->pos.x, _plotter->drawstate->pos.y);
/* do nothing if point is outside device clipping rectangle */
if ((xx < REGIS_DEVICE_X_MIN_CLIP)
|| (xx > REGIS_DEVICE_X_MAX_CLIP)
|| (yy < REGIS_DEVICE_Y_MIN_CLIP)
|| (yy > REGIS_DEVICE_Y_MAX_CLIP))
return;
/* round to integer device (ReGIS) coordinates */
ixx = IROUND(xx);
iyy = IROUND(yy);
/* sync ReGIS's foreground color to be the same as our pen color */
_r_set_pen_color (S___(_plotter));
/* output the point, as a single pixel */
_regis_move (R___(_plotter) ixx, iyy);
_write_string (_plotter->data, "V[]\n");
/* update our notion of ReGIS's notion of position */
_plotter->regis_pos.x = ixx;
_plotter->regis_pos.y = iyy;
}
}
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