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Full Version: Spanning a surface

From: Lara (MALA)
13 Feb   [#1]
Hello,
I need some inspiration, please.
I have a triangle made up of curved splines. These span a rigid corner of a pipe construction. I would like to make this corner even more rigid by filling it with some kind of filler.
However, the surface bubbles up, which is nice, but I don't want that.

Does anyone have any ideas on how I can achieve a simple tension between the splines?

Note:
I think it's because the corners of the spline triangle overlap.
In the other example, you can see a different filling. It is clamped from four arcs. That is what I am aiming for with the triangle.


thx, Mala

P.S.: I cannot modify anything on the splines. Otherwise, the pipe construction will no longer be correct.



Attachments:
FILLER TESTING.3dm

Image Attachments:
FILLER TESTING BETTER.png  FILLER TESTING.png 


From: Michael Gibson
13 Feb   [#2] In reply to [#1]
Hi Mala, usually it is better to make a wider surface and then trim or boolean it with the surrounding objects rather than trying to fill in an irregular area.

Is it possible for you to post more of your model like the pipes or other surfaces that are surrounding this piece?

- Michael
From: BurrMan
13 Feb   [#3] In reply to [#1]
Just trying to get clear on what you are looking for

Are either of these Closer?

Attachments:
FILLER TESTING samples.3dm

Image Attachments:
samples.jpg 


From: Lara (MALA)
14 Feb   [#4] In reply to [#3]
Hi,
thanks.
Both are much better than mine. Neither is perfect, but that's because of the lines I was given. The green one feels nicer. How did you make it?
From: BurrMan
14 Feb   [#5] In reply to [#4]

Hey Mala

Its done with sweep with the maintain tangent selected and the maintain height deselected

But the caveat is the curve geometry needs to be fixed. Its pretty messed up with little folds and such, which is probably what is keeping you from getting a result.

It is what is also making the surfaces in the model i posted “not great” also.

Some type of cleanup needs to happen. The “cant change the curves” statement is making you kindof stuck

Maybe follow up more with Michaels post and get a better answer too….


From: Lara (MALA)
14 Feb   [#6] In reply to [#2]
Hi Michael, thank you...
...I can't publicly show the surrounding structure. It's a development I'm still forced to keep to myself. I agree that a solution would certainly be more easily achievable with the constructive context. I'll see if I can get on with BurrMan's approach...
From: BurrMan
14 Feb   [#7] In reply to [#6]
Hey Mala,
I made a couple brief videos with your model and geometry to give some insight as to what you are looking for.

Here is one that shows the main culprit. But I also use this to show you "rebuild" and also talk a little about a common error made in "adhering to some unrealistic tolerance"

The CAD modeling will model things to pretty tight tolerances. even at unrealistic levels. Think a microscope on a razor blade. At some type of zoom, the sharp blade will look like the edge of a rock!!!

So applying your understanding of what may be needed (A welder fills in gaps on pipes) you can adjust expectations to meet the real world and get great results!


From: BurrMan
14 Feb   [#8] In reply to [#7]
Here is one more. In the first video i left it with one area still showing error or non satisfactory results.

I found it and fixed it (Just quick and dirty. may need more thought to fix)

Wanted to show you...


From: Lara (MALA)
15 Feb   [#9]
Hey Burrman,
I'm doing very well with that. I'm going to focus more on the micro-level distortions that I've ignored up to now. I'll get around to it again this week. With the impulses, it should work very well. Thank you very much for your suggestions...
From: BurrMan
15 Feb   [#10] In reply to [#9]
You’re welcome Mala!

Good luck….