rect
Entity: predicate

round_rect
Entity: predicate

Usage:
rect(X1,Y1,X2,Y2)
round_rect(X1,Y1,X2,Y2,Ex,Ey)

Draws a rectangle with coordinates X1,Y1, X2,Y2 using the current pen , and fills it with the current brush . In round_rect the arguments Ex and Ey give the size of the ellipse which is used to make the corners round.

If Ex and Ey are zero then round_rect will be the same as rect . On the other hand if Ex and Ey are too big then round_rect will become ellipse.

Example:

?-window(_, _, win_func(_), "Rectangle demo", 100, 100, 200, 200).

win_func(paint):-
rect(50,50,150,150), round_rect(70,70,130,130,10,10).

See also:

line
ellipse