adaptive tessellation mesh swimming

[lecrab]

Can anybody please recommend me a source of info with a solid math explanation as to why mesh swimming appears when using HW tess and how to counter it ?

I am particularly interested in the triangle tessellation because I can't get my mind on to how one can prevent the crazy HW tess patterns (fractional) from not creating a swimming effect. The way I see it when there is a jump from N -> N+2 the generated vertices will create swimming.

Thanks.

 

[jlippo]

There was interesting post on the subject a while back.
http://sebastiansylvan.wordpress.com/2010/04/18/the-problem-with-tessellation-in-directx-11/

 

[lecrab]

That's great, thanks alot. And great blog btw, other interesting subjects.