Creating a Surface from Four Points

This task explains how to create surfaces by clicking four points in pre-existing geometry and space.

Open the FourPointsPatch1.CATPart document.

1. Click the 4-Point Patch icon  in the Surface Creation toolbar.

2. Click one of the curves.

You can click anywhere on any curve, at the intersection of curves, or on any other element.

3. Successively click two other points on the pre-existing geometry. An outline is previewed, representing the surface as it is defined.

4. Click anywhere in the document to create the last point used in the surface definition.
   If you click in space, the patch is a planar patch that belongs to the plane defined by the first three points.
   If you click the fourth point on existing geometry, the resulting surface will not necessarily be planar.

5. Once all four points have been clicked, the corresponding surface is automatically created.

• Right-click and choose the Edit Orders menu item to edit the surface orders (U and V) at any time during the creation.

• Available capabilities from the Dashboard are: creation and auto detection.