Hi Sergey,

Thank you. And here is a nice representation of that which makes it easy to understand.
http://www.owlnet.rice.edu/~comp360/lectures/point_inside_polygon.pdf

Ali

>Take a look at http://astronomy.swin.edu.au/~pbourke/geometry/insidepoly/
>
>>I have a series of x, y coordinates for a polygon’s vertexes which can be any kind of polygon. I also have x, y related to a point. I want to determine whether the point is in the polygon or not. Does anybody know about an algorithm or something which helps.