Given a T-spline surface, how to reveal its T-mesh

[afullo]

Hi. I'm writing a thesis on T-splines, showing some uses in Rhino as applicational part.
To link in a better way the theoretical part and the applicational part of the thesis, it would be useful for me, given a T-spline surface, to reveal or in general to have some informations about his T-mesh, with the knots set in the sense of pairs of parameters (http://wwwlb.aub.edu.lb/%7Eanasri/tspline.pdf), while control points are instead already visible by the standard view. Is there a way to do it?

Thanks in advance.

Fabio

[TomFinnigan]

So, there are a couple of debugging tools that we have in the shipping version that might be helpful.

To show the knot intervals on edges, you can run:
_tsMacroUtil _ShowKnots

This will dump Rhino dots in the document at the center of each edge labeled with the knot interval.

If you're interested about the correlation between components in the tsm file and the model, you can run:
_tsSetDebugFlag

And then there are options for drawing vert indices, grip indices, edge indices, link indices, and face indices. Most of the time the user doesn't care about those, but they're useful for debugging. You need to have a t-spline in the document that has control points on in order for the debugging component dots to draw.

Just as an aside, in our implementation verts are topological, while grips are the actual control points. It's possible with creases or the border of the surface to have multiple grips per vert. Links are just what we call half edges.

Hope that helps. Let me know if you have other questions.

[afullo]

To show the knot intervals on edges, you can run:
_tsMacroUtil _ShowKnots

This will dump Rhino dots in the document at the center of each edge labeled with the knot interval.

It doesn't work, unfortunately. When I type _tsMacroUtil it asks me which macro utility function I want to use. The options are _ToolbarText, _ClearCapCache, _TestCaseTools, _PerfTest, _DragTest, _RegisterGripCallback, _ExportToolbarText, _DialogTest, _Crash, _LabelKnots, but not _ShowKnots; if I type directly _ShowKnots, it said it's an unknown command. Maybe I own an outdated version of the T-spline addon?

If you're interested about the correlation between components in the tsm file and the model, you can run:
_tsSetDebugFlag

And then there are options for drawing vert indices, grip indices, edge indices, link indices, and face indices. Most of the time the user doesn't care about those, but they're useful for debugging. You need to have a t-spline in the document that has control points on in order for the debugging component dots to draw.

This one works, but can I have more infos about those elements, other than progressive numbering of them?

Just as an aside, in our implementation verts are topological, while grips are the actual control points. It's possible with creases or the border of the surface to have multiple grips per vert. Links are just what we call half edges.

So, verts form a proper set (listed once for any point), while grips allow multeplicity more than one?

Hope that helps. Let me know if you have other questions.

Thanks again.

[Nicholas North]

"_ShowKnots" was a typo, I think. That should have been: _tsMacroUtil _LabelKnots

[afullo]

"_ShowKnots" was a typo, I think. That should have been: _tsMacroUtil _LabelKnots

It works. Thanks a lot.