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.

  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?

NoteIf you mix curves and corners, you must click the curves first.
NoteAfter 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. If modifications to the boundary curves cause them to stop intersecting (while construction history is on), a small red and yellow arrow appears at that corner. Right mouse clicking on the arrow displays a bubble with an explanation of the problem.

    See Make 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.

See View and edit the construction history of an object