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Home : How do I? : Create surfaces : Build primary surfaces that maintain continuity :

Create a surface inside four boundary curves or corners (Square)

Use Square to create a surface by blending inward from a combination of four free curves and/or corners.

Previous: Sweep generation curves along rail curves (Rail)

Create a surface

1  Choose Surfaces > Boundary surfaces > Square .

2  Click the boundary curves, or snap corner locators to existing geometry, in clockwise or counter-clockwise order.

	What combination of curves and corners can I use?

Note

If you mix curves and corners, you must click the curves first.

Tip

After the surface appears, you can move a corner locator by dragging it.

What if...?

I can't create a surface from my curves?

• Make sure your curves intersect.
• The Square tool tests whether curves intersect within the Curve Fit Distance tolerance in Construction Options. To change the Curve Fit Distance option, choose Preferences > Construction options.
• You can't create a surface inside boundary curves with sharp corners, CV multiplicity, or multi-knots. To remove multi-knots, turn on the Rebuild option for rail curves.

The resulting surface is too complex?

• Turn on the Rebuild options for the curves used to create the surface.

• Turn on the Explicit control option, then manually choose how many spans the surface may have and what degree it should be in the U and V directions.

I want to change a Square surface after I've worked on other objects?

Choose Object Edit > Query edit and click the surface.

How do I View and edit the construction history of an object

Next: Specify continuity on a Square or Rail surface

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