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PLANE_INT

PLANE_INT

Name


      PLANE_INT

Purpose


      Compute the intersection line of two planes.

Category


Calling Sequence


      plane_int, a1, a2, a3, b1, b2, b3, p, u, flag

Inputs


      a1, a2, a3 = 3 pts in plane A (a1=(xa,ya,za),...). in.
      b1, b2, b3 = 3 pts in plane B (b1=(xb,yb,zb),...). in.

Keyword Parameters


Outputs


      p = a point on intersection line (Px,Py,Pz). out.
      u = Unit vector along intersection line (Ux,Uy,Uz). out.
      flag = intersect flag. 0: none, 1: intersection.

Common Blocks


Notes


Modification History


      R. Sterner. 25 Oct, 1988.
      Johns Hopkins University Applied Physics Laboratory.
      R. Sterner, 1996 Dec 10 --- Fixed a mistake found by
      David S. Foster, UCSD.
  Copyright (C) 1988, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.



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