Find the intersection point of two coplanar lines, or the crossing point of two agonic lines.

Input parameters:

1. La → First intersecting or crossing line.
2. Lb → Second intersecting or crossing line.
3. Li → Limit the closest approach calculation to the finite line segments.
   •  True → Finite
   • False → Infinite

Output parameters:

1. Pt → Point at the closest approach of the two lines.
2. Dt → Distance from point to either line.