Rebuild Surface

Use it!

(3D only) Used to rebuild a B-spline surface.

Tool Setting	Effect
Type	Sets the type of rebuilt surface. Reduce Data — Used to remove unnecessary control points from a surface with tolerance. Rebuild with Tolerance — Used to remove cusp points on a surface by sampling a set of points from the surface and recreating it. Rebuild with Num Poles — Similar to Rebuild with Tolerance, but with a fixed number of poles as input. Swap UV — Swaps the U and V directions, so that U becomes V and vice versa. Reverse U — Reverses the U direction. Reverse V — Reverses the V direction. Reparameterize — Where a surface has all the knots concentrated in a certain region, such as to one side of the surface, it may be that the 0.5 knot is not near the center of the surface. This option attempts to rebuild the surface such that the 0.5 knot corresponds, as near as possible, to the center of the surface.
Make Copy	If on, the original surface is not deleted upon creation of the replacement surface.
Tolerance	Sets the maximum distance allowed between the replacement surface and the original surface. To make the replacement surface appear identical to the original, even though its complexity is reduced, experiment with different Tolerance values.

Tool Setting

Effect

Type

Sets the type of rebuilt surface.

Reduce Data

Rebuild with Tolerance

Rebuild with Num Poles

Swap UV

Reverse U

Reverse V

Reparameterize

Make Copy

If on, the original surface is not deleted upon creation of the replacement surface.

Tolerance

Sets the maximum distance allowed between the replacement surface and the original surface. To make the replacement surface appear identical to the original, even though its complexity is reduced, experiment with different Tolerance values.

To reduce the number of poles in a B-spline surface

Select the Rebuild Surface tool.

From the Type option menu, choose Reduce Data.

Identify a B-spline surface.

Accept the reduction in the number of poles.
The number of control points reduced in both parametric U and V directions are displayed in the status field.


Identify a B-spline surface (1). Accept the reduction in the number of poles (2) to modify the surface.


The number of control points reduced in the U and V directions are displayed in the status field.

Key-in: REBUILD SURFACE

To check the number of control points in a B-spline surface, use the Element Information tool in the Primary Tools tool box or choose Information from the Element menu.