MrTom

12-09-2011, 11:31 PM

Max 2010 SP1.

Re: tangentBezier3D @ last/first segment.

http://www.fn-9.com/F9_People/Mrtom/tangentbezier3d_01.png

The image shows the results of obtaining the point3 tangent of a spline segment using tangentBezier3D.

There are four separate sets of results, those on the left use a 'param' value of 1.0, those on the right 0.99999.

Hopefully its evident to see that using a 'param' value of 1.0 gives different (random?) results each time, out of the four shown three of them are different, only the second and third 'run' gave identical results. I've even had it output "[-1.#QNAN,-1.#QNAN,-1.#QNAN]" as well but predictably it wouldn't when I needed a screen grab.

This seems to only happen with the last segment, all the others appear fine.

Is this something peculiar to Max 2010 SP1 or is it just me?

Does this also happen in later versions of Max?

If anyone can shed any light on this I'd very much appreciate it.

I've also asked this on Autodesk Area some 4 weeks ago but so far no joy.

Many thanks.

Regards.

Re: tangentBezier3D @ last/first segment.

http://www.fn-9.com/F9_People/Mrtom/tangentbezier3d_01.png

The image shows the results of obtaining the point3 tangent of a spline segment using tangentBezier3D.

There are four separate sets of results, those on the left use a 'param' value of 1.0, those on the right 0.99999.

Hopefully its evident to see that using a 'param' value of 1.0 gives different (random?) results each time, out of the four shown three of them are different, only the second and third 'run' gave identical results. I've even had it output "[-1.#QNAN,-1.#QNAN,-1.#QNAN]" as well but predictably it wouldn't when I needed a screen grab.

This seems to only happen with the last segment, all the others appear fine.

Is this something peculiar to Max 2010 SP1 or is it just me?

Does this also happen in later versions of Max?

If anyone can shed any light on this I'd very much appreciate it.

I've also asked this on Autodesk Area some 4 weeks ago but so far no joy.

Many thanks.

Regards.