Single pixel line artifact with Rotate and Wrapped Translate nodes #38488

New Issue

Greg Zaal · 2014-02-04T19:51:45+01:00

Greg Zaal commented

2014-02-04 19:51:45 +01:00

System Information
Windows 64bit, gtx 570

Blender Version
Couldn't find a working version :/ broken in all versions I have (as far back as r57919)

Short description of error
In the compositor, when rotating an image 90 degrees, then translating it (with Wrapping on), a single pixel wide black line appears on the original left border of the image:

In older versions (here r57919), this line looks a bit different, broken at the top and bottom but includes horizontal lines as well:

If you change the rotation angle to something other than 90, the black lines turn into wedges (which makes sense I guess). So the issue here seems to be the pivot of the rotation is not the exact center. In the above screenshots, it's a 4096x4096 image (4x1024), so there would be an exact center to rotate around.

Exact steps for others to reproduce the error
Add 4k image, rotate by 90 degrees, translate (with wrapping) by any amount on both axes.

**System Information** Windows 64bit, gtx 570 **Blender Version** Couldn't find a working version :/ broken in all versions I have (as far back as r57919) **Short description of error** In the compositor, when rotating an image 90 degrees, then translating it (with Wrapping on), a single pixel wide black line appears on the original left border of the image: ![2014-02_18.jpg](https://archive.blender.org/developer/F75998/2014-02_18.jpg) In older versions (here r57919), this line looks a bit different, broken at the top and bottom but includes horizontal lines as well: ![2014-02_20.jpg](https://archive.blender.org/developer/F76000/2014-02_20.jpg) If you change the rotation angle to something other than 90, the black lines turn into wedges (which makes sense I guess). So the issue here seems to be the pivot of the rotation is not the exact center. In the above screenshots, it's a 4096x4096 image (4x1024), so there would be an exact center to rotate around. **Exact steps for others to reproduce the error** Add 4k image, rotate by 90 degrees, translate (with wrapping) by any amount on both axes.

Greg Zaal commented

2014-02-04 19:51:45 +01:00

Changed status to: 'Open'

Lukas Tönne was assigned by Greg Zaal

2014-02-04 19:51:45 +01:00

Greg Zaal commented

2014-02-04 19:51:45 +01:00

Added subscriber: @GregZaal