### Constructing an Intersect Ellipse

An ellipse can be constructed from the intersection of a non-parallel plane and cylinder.

To construct an Intersect Ellipse:

1. Access the Construct Ellipse dialog box (Insert | Feature | Constructed | Ellipse).

2. Select the Intersect option.

3. Select the first feature; it can be either a cylinder or a plane.

4. Select the second feature.

- If you selected a cylinder as the first feature, then this must be a plane.

- If you selected a plane as the first feature, then this must be a cylinder.

5. Click the Create button. PC-DMIS will construct the ellipse at the intersection of the two features. The constructed ellipse will have the plane's normal vector.

The Edit window command block for a sample ellipse would look something like this:

ID=FEAT/ELLIPSE,CARTESIAN,OUT,NO
THEO/X,Y,Z,I,J,K
ACTL/X,Y,Z,I,J,K
CONSTR/ELLIPSE,INT,feat1,feat2