Bug report: Form, Make Uniform. Result not cumputing.

[PinRudolf]

Hi, I found a small bug that has been in Fusion for (I think) a couple of updates:

In the Form workspace. The Make Uniform function does not show any result until after another function has started. That can be a little bit confusing. It seems like the database has been updated but the in-screen model has not. 

See below video. The image updates after I closed the form workspace. But would also update after I've used for example Edit Form. (Which is the better option.)

[TrippyLighting]

PLease share your model. Export as .f3d and attach no next post.

[PinRudolf]

Good point, I should have supplied a sample to test with.  Attached is a new file with the same setup, I have not yet applied the Make Uniform command.

I find the issue is in general with this command, it does not seem to be related to the file or computer. (As far as I can tell.)

[TrippyLighting]

I am not sure what you expect the "make uniform" command to do. 

the make uniform command normalizes or relaxes the tangent handles of T-Spines. It's purpose is not to fix inadequate models. I don't see a software bug here whatsoever!

If you switch into box view mode the problem should become obvious. Not only is the selected polygon is an N-gon with more than 5 edges, it is very contorted. 

If you have an image of the shape you want to model I can possibly demonstrate how to do that.

[PinRudolf]

Hi, 

That is a good tip!

Just to be clear though; the function does what it needs to do! But, it doesn't show the result straight after I've cosed the command. Fusion only shows the result until after I've started/used a new command. I'm not complaining about the endresult, the result is fine, I'm trying to say the result temporarily doesn't show. 

The endresult is not the subject of this topic. To clarify however what the function adds to the table in this sample:
Here are two before (left) and after (right) images of the function. On the left; two line connect almost parallel, on the right; those lines have a larger connecting angle. Using a Zebra-analysis the corner looks much smoother on the endresult.

BeforeAfter

(The right image is a bit misleading because it also shows the previous resulting-body. )

 

I've tested if the error has to do with it being an n-gon. Here is the same result using a quad. See below animation. Note that the model changes after i closed the Form-workspace, not after I closed the Make Uniform command.

[TrippyLighting]

Aha! I see!

The conversion from the T-Spline into BRep/NURBS shows a different result than the smooth view mode.

@adam.helps could you check this out please?

[adam.helps]

I've seen something similar to this before (yesterday). I'll open a ticket and see if we can get this patched. My guess is that there's some kind of stale surface being shown in the view (i.e. it's running make-uniform, but not updating your display), and that "finish form" is what it takes to finally get it updated.

[PinRudolf]

@Trippy.lighting
I don't think that fully covers it either. It's not specifically when I close the form-workspace. It just doesn't seem to give a result until a new command is used, like Finish or Edit Form. Note that when I use Edit Form I immediately revert the change, yet the endresult is now different. The next animation in fully within the form/t-spline workspace. (It's getting very funky now as it only updates the top part of the model.)

@adam.helps 
Yes, that sounds right.

[adam.helps]

One of the other T-Splines engineers suggested this workaround:

1. Run Make Uniform

2. Undo

3. Redo

This seems to be enough to update the stale data in your example. We'll open a ticket to get the root cause fixed (we don't know what the root cause is yet, but we are able to see this happening, so I think we can find it). Thank you for reporting this.

[TrippyLighting]

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@PinRudolf wrote:

@Trippy.lighting
I don't think that fully covers it either.

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No, but with proper modeling techniques you unlikely encounter this anyway 😉