Surface-Surface Intersection Curve

This command creates a curve that is defined by the intersection of two surfaces. You can use surface-surface intersection curves for trimming.

• Select a NURBS object. > Modify panel > Create Curves rollout > Dependent Curves group box > Surf x Surf button
• Select a NURBS object. > Modify panel > NURBS toolbox > (Create Surface-Surface Intersection Curve)

Trimming a surface with a surface-surface intersection curve

If the surfaces intersect at two or more locations, the intersection closest to the seed point is the one that creates the curve.

Procedures

To create a surface-surface intersection curve:

The NURBS object must contain two surfaces that intersect.

1. In the NURBS toolbox, turn on (Create Surface-Surface Intersection Curve).
2. Click the first surface, then the second.

   If the two surfaces intersect, a curve that lies along their intersection is created.

Interface

Surf-Surf Intersection Curve rollout (creation time)

Trim Controls group

Trim 1 / Trim 2

When on, trim a surface against the intersection curve. When off, the surface isn’t trimmed. Trim 1 trims the first parent surface you clicked, and Trim 2 trims the second parent surface.

If the intersection curve does not pass completely across a surface, trimming is impossible, and the affected surface is displayed in the error color (orange by default).

Flip Trim 1 / Flip Trim 2

When on, trim the associated surface in the opposite direction.

U Seed / V Seed

Change the UV location of the seed value on surface 1, the first surface you clicked. If there is a choice of intersections, the intersection closest to the seed point is the one used to create the curve.

Surf-Surf Intersection Curve rollout (modification time)

Trim 1 / Trim 2

When on, trim a surface against the intersection curve. When off, the surface isn’t trimmed. Trim 1 trims the first parent surface you clicked, and Trim 2 trims the second parent surface.

If the intersection curve does not pass completely across a surface, trimming is impossible, and the affected surface is displayed in the error color (orange by default).

Flip Trim 1 / Flip Trim 2

When on, trim the associated surface in the opposite direction.

U Seed / V Seed

Change the UV location of the seed value on surface 1, the first surface you clicked. If there is a choice of intersections, the intersection closest to the seed point is the one used to create the curve.

Replace First Surface / Replace Second Surface

Let you replace the parent surfaces. Click a button, then click the surface to replace the original first or second surface.