Intersection of line and face when parallel

Hi there,

acting in a 2D environment I need to check if a given edge passes through a face.
I also need to differentiate these cases:

a) the edge crosses the face -> this means a hit
b) the edge is only touching the face's boundary (e.g. it is contained in the boundary wire) -> this means not hit

I am working with IntCurvesFace_ShapeIntersector but it gives no intersections. I also tried setting the boundary parameter to +/-INF (see
Could it be a problem that the face and the edge are parallel in my 2d world?

Thanks for your help, Elio

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