Slicing with 0% support density does not terminate if the cross pattern is used.

[ThomasRahm]

Application Version
4.7.1

Platform
Windows 10

Steps to Reproduce
Set Support Pattern to "cross" and Support Density to 0% with support enabled.

Actual Results
The slicing never finishes.

Expected results
The support should have no infill.

Additional Information
Issue is that support line distance is set to 0 when the support density is 0.
This causes the following loop of SierpinskiFillProvider.cpp (line 73) to never terminate:

coord_t aabb_size = min_line_distance;
while (aabb_size < max_side_length)
{
    aabb_size *= 2;
    depth += 2;
}

As aabb_size will be 0.

I am not sure how to fix this issue, without potentially adding a new one.

[fvrmr]

Hi @ThomasRahm thank you for your report.
I can also reproduce this in 4.8. I will discuss it with the team.
Keep you posted!

[fvrmr]

Hi @ThomasRahm I have discussed it with the team. But I have to defer this. Because it is really exceptional to run into this. So it is not a priority for us to fix. Hope you understand.

[lospo]

Hi thomas, this is not a bug!
I've talked about your mod, maybe you are interested!
https://community.ultimaker.com/topic/40567-cura-tree-support-mod-ts2/
Have a good day

[ThomasRahm]

@lospo Great to hear that you like it, but this is the wrong place for it.
If you want to give feedback here on github, please use the draft pull-request thread for it.
Also you may want to edit your message, as i interpreted "This is not a bug" as disagreeing regarding the bug reported above and that the slicing to hang is intentional.