# Displacement Calculation
For the displacement calculation the polygons resulting from these cuts is used
- 1D – the element cut of the plane is expanded to the enclosing box
- 2D – the element cut line is expanded to the top and bottom surfaces
- 3D – the polygon on the cut plane
The displacement and rotations are based on a displacement plane
described for each component
A least-squares fit across the
Then the displacement are
And rotations are about
The twisting rotation is calculated from