CAD software discussion forum > 3D CAD/CAM > Just What Are T-Splines Anyway?

Just What Are T-Splines Anyway?

Rank: 1

Jon

Newbie

posts: 61

Registered: 2009-12-31

Message 1 of 8

 Just What Are T-Splines Anyway?
25-09-2010 07:25 . pm | View his/her posts only
What are they good for?

Why would I need them in ZW3D?

http://www.tsplines.com/products/what-are-t-splines.html

Jon Banquer
San Diego, CA




Rank: 1

Tim

Newbie

posts: 0

Registered: 2011-10-31

Message 2 of 8

29-09-2010 01:15 . pm | View his/her posts only
Single-surface solids with editable spline surface toplogy.

Rank: 1

Tim

Newbie

posts: 0

Registered: 2011-10-31

Message 3 of 8

29-09-2010 01:20 . pm | View his/her posts only
To translate a t-spline shape to ZW3D it would have to be converted to a connected, continuous set of b-spline faces. I.e., a traditional freeform solid.

Rank: 7Rank: 7Rank: 7

Paul

Moderator

posts: 262

Registered: 2011-9-17

Message 4 of 8

29-09-2010 02:11 . pm | View his/her posts only
Hey Dr. Top,
brevity is cool but....
could you use the built in translator and expand the explanations a little more ... please?

Rank: 1

Tim

Newbie

posts: 0

Registered: 2011-10-31

Message 5 of 8

29-09-2010 02:25 . pm | View his/her posts only
Sure, but what part is confusing?

A single t-spline surface can contain topological information that is traditionally reserved for faces, loops, vertices and edges bounding b-splines (one per face).

Rank: 7Rank: 7Rank: 7

Paul

Moderator

posts: 262

Registered: 2011-9-17

Message 6 of 8

30-09-2010 04:51 . pm | View his/her posts only
OK, here's what I think you have said.
A T-Spline shape is one surface.
The surface is made of multiple faces.
Each T-Spline face contains all the info needed to describe itself.
To convert to ZW3D it would break up the surface into multiple faces.

So, can the two live side by side in the same modeling environment?

How readily is T-Splines integrated into a NURBS modeler?

Is T-Splines the only NURBS compatible free form option at present?

Is NURBs modeling characteristics set in stone or can it be enhanced to become more like T-Splines?

I've got more questions but maybe they vanish one these are answered... TIA

Rank: 1

Tim

Newbie

posts: 0

Registered: 2011-10-31

Message 7 of 8

01-12-2010 09:59 . am | View his/her posts only
Well it could be one surface and one face or one surface and multiple faces or multiple surfaces and multiple faces.

It is probably better to think of a t spline as the smooth analog of an stl file. Control mesh elements need not be quadrilaterals. They can be
triangles. So just one surface patch, via editing and knot insertion can be used to construct all kinds of crazy stuff. For instance I think you could
make three fillets and a vertex patch from one surface and one face...that also interpolates the boundaries. We currently use four because of the limitations
of traditional patches.

NURBS are, I think, a subset of t-splines, so if you have t-splines you have NURBS. But adding t-splines to a traditional NURBS
modeler would be an overhaul.

Rank: 1

warren

Newbie

posts: 0

Registered: 2004-10-28

Message 8 of 8

01-11-2011 09:18 . pm | View his/her posts only
Quote

Originally posted by: JonBanquer
What are they good for?

Why would I need them in ZW3D?

http://www.tsplines.com/products/what-are-t-splines.html

Jon Banquer
San Diego, CA


They are absolutely awesome!!! I use Tsplines in Rhino for all my surfacing. It has easiily paid for the investment with the savings. You don't have a history but in the organic modelling world that's a good thing. ZW handles them just fine. I throw Tspline models in to ZW for mold design.
See also