Rotating small selections doesn't work

[HCGS]

Whenever I try to rotate a very small selection of pixels, I get strange, unexpected behaviour. This seems to only occurs if the selection's area is less than 16 pixels.

 

[Rick Brewster]

Okay that's not even remotely good. I can repro this. Thanks for reporting!

[Rick Brewster]

Hmm the problem seems to be that the rotation is pulling those corners to half-pixel (well, non-integer) offsets. That's throwing off the sampling.

 

If you (very carefully) move the rotation anchor to the corner of the image, and then do rotation, then things work correctly.

 

However, that's a lame workaround because it's very difficult to do.  It's not even clear what the correct behavior should be in this case, because what we need is pixel snapping of some kind and pretty much any decision about how that snapping should work will make things weird. I'll keep thinking about this though ...

[HyReZ]

When I create a checkboard that is 3x4 pixels and use the Image>Rotate 90 degrees I do not get the results that is described here.

[Rick Brewster]

That's a completely different scenario. I wouldn't expect you to get the same results.

[HyReZ]

The point is to use a 'scenario' that achieves the desired outcome for now.

[Apollo702]

OT: @ RIck Brewser. Is that Tesla 100% PDN?!?!?

 

If it is- WOW!

[Rick Brewster]

No, it's a crop of an image from Tesla's website somewhere iirc

[Apollo702]

I can breathe a little easier. When I see some of the kinds of things people are creating though...

[Rory BD]

This bug still seems to be in effect today, albeit not quite as bad as before. I'm attaching a new illustration of the current behaviour today.

I may be wrong about this, but I think this was at one point no longer a problem, then started happening again after some update.

Any hope of it getting fixed?

Edited October 31, 2022 by Rory BD
clarification, added detail

[Zagna]

44 minutes ago, Rory BD said:

This bug still seems to be in effect today, albeit not quite as bad as before. I'm attaching a new illustration of the current behaviour today.

I may be wrong about this, but I think this was at one point no longer a problem, then started happening again after some update.

Any hope of it getting fixed?

Are you rotating with Shift to lock to 15° intervals?

Free rotating just few degrees lead to few transparent pixels, locked to 90°, no transparent pixels.

[Pixey]

[Rory BD]

16 hours ago, Zagna said:

Are you rotating with Shift to lock to 15° intervals?

Free rotating just few degrees lead to few transparent pixels, locked to 90°, no transparent pixels.

 

15 hours ago, Pixey said:

I can indeed confirm that I am using shift to lock the rotation; the problem still occurs on my end.
Having tried it again just now, the selection box itself is sometimes misaligned as well, but not always. I am attaching another screenshot.

Edited November 1, 2022 by Rory BD
rewording

[Pixey]

2 hours ago, Rory BD said:

the selection box itself is sometimes misaligned as well, but not always. I am attaching another screenshot.

 

You must center your image first, then select it before you rotate it.  Also, are you using the latest version of paint.net?

 

 

[Rory BD]

On 11/1/2022 at 2:19 PM, Pixey said:

 

You must center your image first, then select it before you rotate it.  Also, are you using the latest version of paint.net?

 

 

I'm not entirely sure what you're referring to when you say I must, "center [my] image first," but I will note that the selection box does not appear misaligned prior to rotation. Apart from that, I am selecting it before rotating, and yes, I am using the latest version of paint.net.

 

Sorry for the late reply; I expected to get email notifications if I check the 'follow topic' checkbox, but this seems not to be the case.

Edited November 20, 2022 by Rory BD
Rewording, had more things to say

[Pixey]

12 hours ago, Rory BD said:

 

Sorry for the late reply; I expected to get email notifications if I check the 'follow topic' checkbox, but this seems not to be the case.

 

You need to go to the Account Settings to do this:

 

1.  Click on the arrow next to your Avatar, at the top of the page.

2. Profile > Account Settings > Notifications Settings.

[Rory BD]

53 minutes ago, Pixey said:

 

You need to go to the Account Settings to do this:

 

1.  Click on the arrow next to your Avatar, at the top of the page.

2. Profile > Account Settings > Notifications Settings.

Thanks!

[Rory BD]

On 10/31/2022 at 6:52 PM, Rory BD said:

This bug still seems to be in effect today, albeit not quite as bad as before. I'm attaching a new illustration of the current behaviour today.

I may be wrong about this, but I think this was at one point no longer a problem, then started happening again after some update.

Any hope of it getting fixed?

 

On 11/1/2022 at 2:19 PM, Pixey said:

 

You must center your image first, then select it before you rotate it.  Also, are you using the latest version of paint.net?

 

 

I've figured out the problem; it's because of the selection quality. You can set it to 'Pixelated' to stop it from going funky:



I would like to note that even with this fix, the selection goes from being 4x3 to being 4x4 pixels after rotation; I'm not sure why and I don't think it's really an issue, but I thought I'd bring it up and attach an image of it nonetheless.

Thank you all!

Edited November 20, 2022 by Rory BD
Clarification