Browse Source

* clarification of ellipse routine

carl 23 năm trước cách đây
mục cha
commit
493a40e2bf
1 tập tin đã thay đổi với 2 bổ sung2 xóa
  1. 2 2
      docs/graph.tex

+ 2 - 2
docs/graph.tex

@@ -411,8 +411,8 @@ Procedure Ellipse (X,Y : Integer; Start,Stop,XRadius,YRadius : Word);
  \var{Ellipse} draws part of an ellipse with center at \var{(X,Y)}.
 \var{XRadius} and \var{Yradius} are the horizontal and vertical radii of the
 ellipse. \var{Start} and \var{Stop} are the starting and stopping angles of
-the part of the ellipse. 
-They are measured counterclockwise from the X-axis.
+the part of the ellipse. They are measured counterclockwise from the X-axis 
+(3 o'clock is equal to 0 degrees). Only positive angles can be specified.
 \Errors
 None.
 \SeeAlso