Funky Inset phenomenon
All  1-2  3-4

Previous
Next
 From:  Michael Gibson
5589.3 In reply to 5589.1 
Also Filleting involves some offset calculations inside of it as well, so often times Fillet will also not work on chaotic lumpy things like that as well.

Booleans will probably work as long as the surfaces involved are not actually self intersecting.

The big problem really is in areas like indicated with the red arrow here:




You've got such a tight bend in both directions of the surface in those areas that hardly any offsetting at all will have the offset result end up sticking back through itself, once that happens it's very difficult for various other calculations to work on it very well.

It could even be possible that your surface there is actually self-intersecting already even before any offset is applied to it.... I can't be entirely certain by just looking at a screenshot. By the way it helps a lot if you can post the 3DM model file of the stuff you are asking about instead of just a screenshot, because 3DM files can be closely examined and looked at from different angles, etc... which is not really possible to do with a screenshot.


Here's an example of the kind of messy results that an offset of a relatively large amount will generate as it goes around a tight bend:





If your shapes are set up in such a way that will cause this kind of self-intersecting / bunching / self-crossing type results during part of the calculation it will generally not work, so this is generally a situation that you should try to avoid.

If the models that you need to build are typically full of lots of wiggly bumpy surfaces like this, that's usually a sign that you're not really using "the right tool for the job" - that kind of stuff is better suited for either a polygon modeling program or a brush sculpting program like ZBrush, and not a precision drawing / CAD type program like MoI. Depending on what you are doing sometimes it can work well to use MoI to build some initial broad smooth forms and then use ZBrush to add little detail bumps and engraving as a separate stage though.

- Michael
Attachments:

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
 From:  plish (MPLISHKA)
5589.4 In reply to 5589.3 
Michael,

I was basically pushing the envelope with what I could try to do. It's not typical for the work I do but I enjoy playing ;-) I did find out that fillets didn't work either ;-)

The inset I was doing only went down to the line near the top. Sometimes I can take that top part off and it reveals a surface that I can thicken up to create the inset. It looks like the valleys/peaks between squiggle control points can't be less than the thickness (or twice the thickness) of the wall on the inset. And as you said, the depth can go into the funky bend areas or things just go to pieces.

As always, thanks!
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged
 

Reply to All Reply to All

 

 
 
Show messages: All  1-2  3-4