On 11/17/05, Steve Juranich <[EMAIL PROTECTED]> wrote: > On 11/17/05, Ben Bush <[EMAIL PROTECTED]> wrote: > > Tkinter's coordinates setting are: the left upper corner is the smallest X > > and Y, which is different from our usual think that Y is largest in that > > location. If i draw some lines on the canvas and show some relationship > > among them, do I need transfer the coordinates? > > Transfer the coordinates of what? > > When you go from the standard right-handed system to the system used > in computer graphics, you use these simple formulas: > > max_x, max_y = image size > screen_x = original_x > screen_y = max_y - original_y - 1 > > HTH > -- > Steve Juranich
why subtract 1 from max_y - original_y? -- http://mail.python.org/mailman/listinfo/python-list
