calc_line_plane_intersection.py

import c4d

def calc_line_plane_intersection(o, d, a, n):
    """
    Calculates the intersection of the line described by *o* and *d*
    with the plane described by *a* and *n*.
    """

    dot = d.Dot(n)
    if abs(dot) < 1.0e-7: return None  # parallel to plane
    dist = (a - o).Dot(n) / dot
    return o + d * (dist / d.GetLength())