Function: plotrpoint
Section: graphic
C-Name: plotrpoint
Prototype: vLGG
Help: plotrpoint(w,dx,dy): draw a point (and move cursor) at position dx,dy
relative to present position of the cursor in rectwindow w.
Doc: draw the point $(x1+dx,y1+dy)$ on the rectwindow $w$ (if it is inside
$w$), where $(x1,y1)$ is the current position of the cursor, and in any case
move the virtual cursor to position $(x1+dx,y1+dy)$.
If you draw few points in the rectwindow, they will be hard to see; in
this case, you can use filled boxes instead. Compare:
\bprog
? plotinit(0, 100,100); plotrpoint(0, 50,50); plotrpoint(0, 10,10);
? plotdraw(0)
? thickpoint(w,x,y)= plotmove(w,x-2,y-2); plotrbox(w,4,4,1);
? plotinit(1, 100,100); thickpoint(1, 50,50); thickpoint(1, 60,60);
? plotdraw(1)
@eprog