Geometry Question

Hi there

this is more of a geometry question-
i have a line defined as Ax+By=C and i know the values of the normals for this line, and the intersection area of the line with a given square
what this means that i know the value of A & B and i need to find the value of C using the intersection area
is there an opengl function which i can use to some extent to do this for me?

nope, you have to do it yourself