Visually broken long vertical near reroute point. Longer route → larger gap. #89282
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Unbreak Now!
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Reference: blender/blender#89282
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System Information
Operating system: Windows-8.1-6.3.9600-SP0 64 Bits
Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 375.70
Blender Version
Broken: since 2.83.9 and later, including 3.0
Worked: 2.79b
Short description of error
How it looks:
{F10181058 size=full}
How it should:
{F10181064 size=full}
2021-06-19_07-33-32.mp4
2021-06-19_07-39-03.mp4
brr.blend
Added subscriber: @Vyach
Added subscriber: @PratikPB2123
Added subscriber: @lichtwerk
Can confirm in that file, but cannot reproduce from scratch.
Also: as soon as I move it, the gap disappears.
@lichtwerk I started with factory defaults and still can reproduce it.
try to duplicate reroute and move it straight down with {key Ctrl}
2021-06-22_21-33-17.mp4
Changed status from 'Needs Triage' to: 'Confirmed'
Yep, can get it now, too
@Vyach , still can not reproduce the problem (version: 2.93LTS)
Blender 2021-06-23 14-47-24.mp4.
@PratikPB2123 you need to drag it vertically right after duplication, so reroutes should be aligned from start.
In your case they are not
Added subscriber: @SiboVG
Still able to reproduce this under 3.5.0 alpha (hash
81f425a36f). If two points have the same x- or y-coordinate, and are linked with a (curved) bezier curve, this issue appears. I can't reproduce the issue with noodle curving set to 0.Interestingly, the issue appears to be in the final segment line of the bezier curve. You can see this in the video below, where the y-coordinate of the 2nd to last bezier point is the same as the point where the gap starts.
Screen Recording 2022-12-28 at 03.19.30.mov
The issue appears to be located in
blender-git/blender/source/blender/gpu/shaders/gpu_shader_2D_nodelink_vert.glsl.Added subscriber: @lone_noel
When the endpoints of the links are horizontally or vertically aligned, the 'handle_offset' becomes 0 and two points of the bezier's control polygon overlap. I think this breaks the calculation of the bezier tangents in the shader.
While the issue is old I think I made it worse with
67308d73a4since it's now is also visible on very long horizontal node links.I can take a look over the weekend, unless you wanna try your hand at it @SiboVG. :)
Added subscriber: @ravikul-rao
i am new here ,like absoultely fresh and new , cani i get started on this as my first issue ? with you guys
Sure @lone_noel, you or @ravikul-rao can take this issue, I've been staring at it for too long now :).
This is a good issue to start with, so give it a shot @ravikul-rao :)
If you haven't already, maybe check out the Developer Intro and the page about contributing code on the wiki.
If you get stuck on something feel free to ask over on blender.chat - you can also DM me there. Good luck!