Welcome to the Onshape forum! Ask questions and join in the discussions about everything Onshape.

First time visiting? Here are some places to start:

  1. Looking for a certain topic? Check out the categories filter or use Search (upper right).
  2. Need support? Ask a question to our Community Support category.
  3. Please submit support tickets for bugs but you can request improvements in the Product Feedback category.
  4. Be respectful, on topic and if you see a problem, Flag it.

If you would like to contact our Community Manager personally, feel free to send a private message or an email.

Almost beyond the system limit...

MBartlett21MBartlett21 Member Posts: 1,624 EDU
I did this model that was almost at the system limit.
If I made it any bigger, it didn't work.
The arcs and circles are all showing up wrong.

Why would this be happening?

MB - I make FeatureScripts: view FS (My FS's have "Official" beside them)

Comments

  • Jake_RosenfeldJake_Rosenfeld Moderator, Onshape Employees, Developers Posts: 1,381
    @mbartlett21

    Wow! One of our active priorities now (and pretty much always) is improving the fidelity of our tessellation.  Your example looks like it could be a really good test case for us.  Please make a version on your document that shows the issue and share it with us using the "Feedback" button under the "?" menu.

    Sorry you're experiencing this.
    Jake Rosenfeld - Modeling Team
  • MBartlett21MBartlett21 Member Posts: 1,624 EDU
    @Jake_Rosenfeld

    Here is the document: https://cad.onshape.com/documents/6320c1fa97928fa83a4cdaf5/v/de570ed25c578ffa4dc457b2/
    I have done the grey part on the right corner.

    For some reason, the report a bug function isn't working. Does it need a website whitelisted??
    MB - I make FeatureScripts: view FS (My FS's have "Official" beside them)
  • Jake_RosenfeldJake_Rosenfeld Moderator, Onshape Employees, Developers Posts: 1,381
    @john_rousseau or @NeilCooke may know the answer to that.  What's the behavior you're seeing when you try to report the bug?
    Jake Rosenfeld - Modeling Team
  • MBartlett21MBartlett21 Member Posts: 1,624 EDU
    edited March 2018
    @Jake_Rosenfeld
    When I try to report a bug, nothing happens, even when I click the button again.
    I do have an internet filter on, would that be stopping it working?
    MB - I make FeatureScripts: view FS (My FS's have "Official" beside them)
  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 2,402
    If you have adblock on please disable it, then try again please
    Neil Cooke, Director of Technical Marketing, Onshape Inc.
  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 2,402
    @mbartlett21 - I took a look at the model - any reason you're trying to make a sheet metal part that is more than 500m wide? That is the Parasolid size limit for solid bodies so I would expect some errors if you are close to or over it.
    Neil Cooke, Director of Technical Marketing, Onshape Inc.
  • michael_mcclainmichael_mcclain Member Posts: 178 PRO
    NeilCooke said:
    @mbartlett21 - I took a look at the model - any reason you're trying to make a sheet metal part that is more than 500m wide? That is the Parasolid size limit for solid bodies so I would expect some errors if you are close to or over it.

    That's going to need one hell of a press break
  • Jake_RosenfeldJake_Rosenfeld Moderator, Onshape Employees, Developers Posts: 1,381
    The issue actually has nothing to do with the large part, it has to do with the distance of the small part from the origin.  The size of the world-space coordinates of the triangles of the tessellated part are large enough that its causing floating point resolution issues.

    There are only so many numbers that can be represented in floating point format.  When your number is close to 0, the resolution from one floating point number to the next is very very very fine.  When you're out in the boonies of the real-number line there may be noticeable gaps from one number to the next.  So, the tessellation may be inexact in the first place (because of the inability to exactly represent the number we want) and then the issue compounds through a series of mathematical operations on your graphics card.  This is why the lines of the model seems to jump around; as you rotate the part you're seeing hops from one to the next discrete solution of a floating point operation.

    In any case, your part looks fine if its translated closer to the origin.  Test cases are always welcome though! Submit that ticket if you got the feedback tool working, otherwise let us know if that's still being stubborn.
    Jake Rosenfeld - Modeling Team
  • MBartlett21MBartlett21 Member Posts: 1,624 EDU
    @NeilCooke
    @Jake_Rosenfeld
    I was just having fun. :smiley:
    I also made a feature in that document which adds bend allowance to the sheet metal model.
    I would find this very useful if you could specify the bend allowance per bend
    MB - I make FeatureScripts: view FS (My FS's have "Official" beside them)
  • MBartlett21MBartlett21 Member Posts: 1,624 EDU
    NeilCooke said:
    If you have adblock on please disable it, then try again please
    I don't have an adblocker on, but it still doesn't work.
    MB - I make FeatureScripts: view FS (My FS's have "Official" beside them)
Sign In or Register to comment.