You can construct a point from three planes. PC-DMIS creates a point at their intersection. The vector of the constructed corner point is the cross product of the second input vector into the third input vector.
To construct a corner point:
Access the Construct Point dialog box (Insert | Feature | Constructed | Point).
Select the Corner Point option from the list of options.
Select three different planes.
Click the Create button.
The Edit window command line for this option would read:
CONSTR/POINT,CORNER,feat_1,feat_2,feat_3
A - Point constructed at the intersection of three planes (PLN1, PLN2, and PLN3)
Constructing a corner point from three planes