pipe component bug?

hello,

the pipe component seems to have a bug in Build 0.9.0076.

When I create a polyline, defined by minimum 4 points which are planar (2d) and add the pipe component everything works fine.

But when I move one point out of the planar level (z-direction) so that the polyline becomes threedimensonal, the pipe function creats a total distorted result.

I found this out by open an Gh-definition made by an older Gh-version, were everything has worked fine. But in the current build it does not work, even when i reproduce it.

Does anybody know this problem?

Replies to This Discussion

Permalink Reply by Danny Boyes on October 31, 2014 at 8:35am

can you supply the curve in question or at least provide some images showing these cases. I cannot re-create the problem based solely on your description above.

Permalink Reply by Danny Boyes on October 31, 2014 at 8:44am

Or is this what you are describing?

Permalink Reply by Johannes on October 31, 2014 at 9:03am

Here are some screenshots how I create the pipe and what happens if one point has been lifted.

The same depends to the sweep component.

What is wrong here?

Attachments:

pipe03.JPG, 42 KB
pipe01.JPG, 140 KB
pipe02.JPG, 149 KB

Permalink Reply by Danny Boyes on October 31, 2014 at 9:42am

I'm afraid I simply cannot re-create the conditions. It might have something to do with the Units/Tolerances/Mesh Settings you have.

upload the files see if that will help re-create it.

Permalink Reply by Johannes on October 31, 2014 at 9:04am

and the sweep component! ...same distortion!

Attachments:

pipe04.JPG, 45 KB

Permalink Reply by Johannes on November 2, 2014 at 1:34pm

Here are my files.

Can anybody be so kind and check if the same problem apears when moving one of those points a little bit in Z-direction.

Thank you.

Attachments:

pipe sweep.gh, 9 KB
pipe sweep.3dm, 61 KB

Permalink Reply by Valentin on November 2, 2014 at 2:26pm

No bug no problem work great!

Permalink Reply by Johannes on November 3, 2014 at 2:26am

I found a fellow sufferer who has a very similar problem.

http://www.grasshopper3d.com/forum/topics/piping-on-curve-misalignment

Not grasshopper is the problem but rhino. Therefor I was able to recreate the same eroor by building the pipe object directly in rhino.

The solution is to change the preset configuration for absolute tolerance from 0.0001 to 10 units.

Not till then the error disapears.

anyway, thank you for help.

Permalink Reply by Johannes on November 3, 2014 at 4:00am

please forget my optimistic reply above!

When the line is made out of more points then 4 it will more and more harder to solve the problem by pushing the tolerance, even if I put it to 1000 units, which does not make any sense. It is not possible to work accurately even with 10 units because it removes any precision for other operations.

So this can't be a proper way.

But it might be better to change to a rhino-forum with this case.

Permalink Reply by Johannes on November 3, 2014 at 6:53am

problem fixed by updating rhino to newest version. Now everything works fine.

Permalink Reply by Danny Boyes on November 3, 2014 at 7:54am

thanks for the update.

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