[Tutor] Questions of Maths

[Abu Ismail]

Hi,

I am working on an implementation of an L-system in Python. I hate
using turtle module since it uses Tk and as my IDE also uses Tk I have
to close my editor before I can test the program. So I am implementing
the graphics using PIL.

Now to the problem.

Say you have a line AB with co-ords (x1,y1) and (x2,y2). Say you also
have a point C with co-ords (x3,y3).

Question: how to determine whether point C is to the left or to the
right of the line AB?

Any suggestions would be welcome.

Ta,
AH