I've found some source code on a dutch delphi forum,that shows how to determine line intersection.
I looked at the sourcecode and it's all english (AFAIK) :razz:

Here it is: http://www.nldelphi.com/Forum/attach...6&d=1144865795

It contains 2 line intersection algorithms (i guess both work the same), but one is a little more compact, and returns more info about the intersection.

You should try your coordinates with this code. You may find the problem with your source. :razz:


Hope this helps