Geometry defects added by resample command

[chriscox]

3DCoat 2024.31
Using the simplify command adds some glaring geometry defects (lines crossing across shapes, divots all over the surface, etc.).  There are no errors or indications of a problem, except for the bad geometry.  I have files from before and after using the command showing the defects (about 150 Meg 7z file).
Should I post a link here, or give it directly to a developer?

[Dmitriy Nos]

 

 

11 hours ago, chriscox said:

3DCoat 2024.31
Using the simplify command adds some glaring geometry defects (lines crossing across shapes, divots all over the surface, etc.).  There are no errors or indications of a problem, except for the bad geometry.  I have files from before and after using the command showing the defects (about 150 Meg 7z file).
Should I post a link here, or give it directly to a developer?

Could you at least briefly describe what you do?

[chriscox]

1) Open model
2) Run the Simplify command with a target between 8 million and 1 million faces.
3) Observe really, obviously bad geometry.

It is that simple.

It will be lot more obvious with the example files.
Again, should I post a link here, or give them directly to a developer/QA?

[Elemeno]

15 minutes ago, chriscox said:

1) Open model
2) Run the Simplify command with a target between 8 million and 1 million faces.
3) Observe really, obviously bad geometry.

It is that simple.

It will be lot more obvious with the example files.
Again, should I post a link here, or give them directly to a developer/QA?

sorry silly question ... but what is the simplify command?

[chriscox]

Looks like I was dealing with too many bug reports and got the hand written notes confused.  (I'm testing several applications to try and clean up models, and all are failing in different ways)
It was resample, not "simplify".  Fortunately I renamed the files correctly before trying to write down details.
Sorry about that.

[Elemeno]

1 hour ago, chriscox said:

Looks like I was dealing with too many bug reports and got the hand written notes confused.  (I'm testing several applications to try and clean up models, and all are failing in different ways)
It was resample, not "simplify".  Fortunately I renamed the files correctly before trying to write down details.
Sorry about that.

i went from 11Mil to 1Mil , its the same asa always, haave you got a Scrsht of the topology?

[chriscox]

Here is the interior before resampling.


Interior After Resampling.  Note the thin rods connecting interior geometry that shouldn't be there. They are real geometry and can be edited - but there's a bug in the code that is connecting unrelated parts.



Outside before.


Outside after. Note the dings/divots/artifacts.

[Dmitriy Nos]

10 hours ago, chriscox said:

Note the thin rods connecting interior geometry that shouldn't be there

Yes, there is such a problem in 3dcoat. Please send me a .3b scene so that I can remind the developer about this ancient bug.

[chriscox]

Ok, I sent you a direct message with a link to the example files (before and after).

[Dmitriy Nos]

15 hours ago, chriscox said:

Ok, I sent you a direct message with a link to the example files (before and after).

Thank you! I'll pass it on to the developer as a bug. But the mesh is stretched too much.

[chriscox]

Yes, I know. That is something that I'm working on - it is an extreme extrusion, and my current extrusion code simply extrudes without altering the mesh beyond the edges of the extrusion map.  And even with the stretched mesh, it works well for printing and texturing.
But as an extreme case, it also seems to expose bugs in applications pretty frequently.