There's probably a math method to do this, but I don't know it. And there are a couple of "dumb" methods, which I would probably use :)
1. Create a collision polygon in a sprite with this addon. Then check if this sprite is overlapping a point.
2. Draw the polygon on a drawing canvas, fill it with color. Then save a snapshot and read pixel color at point coordinates.
1) collision polygon in a sprite is not allowed when dealing with a large number of vertices.
2) Also drawing canvas can't support drawing polygon with big number of vertices (I naaed solution for dealing with polygon with more than 4000 vertices)
Thanks anyway, first time heard about an addon allowing sprite collision manipualtion