topic Re: restoring a sharp corner on t-spline surface in Fusion Design, Validate & Document Forum

restoring a sharp corner on t-spline surface

Anonymous — Mon, 29 Jun 2020 20:49:20 GMT

I have a t spline surface that resulted from converting an obj file, and I wish to have four sharp corners on it. In the box view it has sharp corners (see upper left corner) but in 'smooth view' it has become rounded. I realise there is a triangle here but my attempts to insert an edge or a vertex and make a quadrangle at the corner have failed miserably and resulted in a very distorted form. I'm at a loss as to how to edit this, please help!

Re: restoring a sharp corner on t-spline surface

jeff_strater — Mon, 29 Jun 2020 22:01:21 GMT

Box view always shows just the "unsmoothed" lattice of the TSpline. The smooth version shows the smoothed (similar to Sub-D surfaces) version of the lattice.

If you want to maintain sharp corners on any edges, use the Crease command on those edges. This suppresses the smoothing on those edges:

Re: restoring a sharp corner on t-spline surface

Anonymous — Tue, 30 Jun 2020 10:15:48 GMT

Hi Jeff,

thanks for that prompt response. I had tried using the 'Crease' command previously and it didn't seem to work. I think I was picking the wrong edges - when I select the edge pointing towards the corner (rather than those adjacent to it) it does indeed work. That bit wasn't obvious to me.

thanks again