Intersection point of a 3D EDGE segment and a 3D polygon.

   INTER = intersectEdgePolygon3d(EDGE, POLY)
   Compute coordinates of intersection point between the 3D edge EDGE and
   the 3D polygon POLY. EDGE is a 1-by-6 row vector containing source and
   target positions of the edge, POLY is a Nv-by-3 array containing
   coordinates of 3D polygon vertices.
   INTER is a 1-by-3 row vector containing coordinates of intersection
   point, or [NaN NaN NaN] if edge and polygon do not intersect.

   INTERS = intersectEdgePolygon3d(EDGES, POLY)
   If EDGES is a N-by-6 array representing several edges, the result
   INTERS is a N-by-3 array containing coordinates of intersection of each
   edge with the polygon.

   [INTER, INSIDE] = intersectEdgePolygon3d(EDGE, POLY)
   Also return a N-by-1 boolean array containing TRUE if the corresponding
   edge contains the intersection point.

   Example
     % Compute intersection between a 3D edge and a 3D triangle
     pts3d = [3 0 0; 0 6 0;0 0 9];
     edge1 = [0 0 0 3 6 9];
     inter = intersectEdgePolygon3d(edge1, pts3d)
     inter =
           1   2   3

     % keep only valid intersections with several edges
     pts3d = [3 0 0; 0 6 0;0 0 9];
     edges = [0 0 0 3 6 9;10 0 0 10 2 3];
     [inter, inside] = intersectEdgePolygon3d(edges, pts3d);
     inter(inside, :)
     ans = 
           1   2   3

   See Also
   intersectLinePolygon, intersectRayPolygon3d, intersectLinePlane

Package: matgeom