intersection between a triangle and a line

I''m looking for a function which gives me information about a intersectionpoint. horniestly the function should look like this: vect3 findintersection( vect3 trianglepoints[3], vect3 linestart, vect3 lineend ); I need a triangle and the line to test. is the line goes throught the triangle, the function should return the intersectionpoint. if the returnvalue = lineend, the line did not vcontact the triangle. can anyone help me ? (i know, my english is godlike ))