gf_closest_point_to_line  931 include/gpac/maths.h GF_Vec gf_closest_point_to_line(GF_Vec line_pt, GF_Vec line_vec, GF_Vec pt);
gf_closest_point_to_line 1242 src/compositor/mpeg4_sensors.c 					compositor->hit_local_point = gf_closest_point_to_line(r.orig, r.dir, vec);