Circle Selection do not selects in X-Ray mode with close range to elements #89295

New Issue

Eugene Du · 2021-06-19T19:30:30+02:00

Eugene Du commented

2021-06-19 19:30:30 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1650 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.51

Blender Version
Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: 84da05a8b8
Broken: 2.92

View Settings

Exact steps for others to reproduce the error
Circle_Selects_Bug.mp4
Circle_Selection_Bug.blend

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce GTX 1650 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.51 **Blender Version** Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: `84da05a8b8` Broken: 2.92 **View Settings** ![View_Settings.png](https://archive.blender.org/developer/F10181763/View_Settings.png) **Exact steps for others to reproduce the error** [Circle_Selects_Bug.mp4](https://archive.blender.org/developer/F10181756/Circle_Selects_Bug.mp4) [Circle_Selection_Bug.blend](https://archive.blender.org/developer/F10181768/Circle_Selection_Bug.blend)

Eugene Du commented

2021-06-19 19:30:30 +02:00

Added subscriber: @APEC

Robert Guetzkow commented

2021-06-19 23:18:14 +02:00

Added subscriber: @rjg

Robert Guetzkow commented

2021-06-19 23:18:14 +02:00

While I haven't checked your file yet, this is a most likely a floating point precision issue due to the large clipping range. It makes checking of the Z-values problematic. Always avoid using such big clipping ranges.

Eugene Du commented

2021-06-20 08:50:08 +02:00

I tested with bigger Clipping Start value and found another strange issue with drawing the lines in Viewport.
Bigger Clipping Start range did not change Circle selection behavior, also lower Clipping End did not change behavior.
And I just noticed that it affect all types of selection (Box, Lasso), so bug report need to rename to somethings like
"Selection do not selects in X-Ray mode with close range to elements"

Bigger resolution to better see the issue with lines in Viewport.
Circle_select_issue2.mp4

I tested with bigger Clipping Start value and found another strange issue with drawing the lines in Viewport. Bigger Clipping Start range did not change Circle selection behavior, also lower Clipping End did not change behavior. And I just noticed that it affect all types of selection (Box, Lasso), so bug report need to rename to somethings like "Selection do not selects in X-Ray mode with close range to elements" Bigger resolution to better see the issue with lines in Viewport. [Circle_select_issue2.mp4](https://archive.blender.org/developer/F10182836/Circle_select_issue2.mp4)

Pratik Borhade commented

2021-06-20 14:08:23 +02:00

Added subscriber: @PratikPB2123

Campbell Barton commented

2021-06-20 16:28:07 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2021-06-20 16:28:07 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Campbell Barton commented

2021-06-20 16:28:07 +02:00

This is caused by part of the edge being behind the view, causing 2D projection to fail.

One possible solution to this problem is to clip the edges by the near-plane before projecting into screen-space.

It may be necessary to clip by the 4 planes defined by window bounds as well - to prevent points near the clip plane being too large or infinite - causing other calculations to fail.

This is caused by part of the edge being behind the view, causing 2D projection to fail. One possible solution to this problem is to clip the edges by the near-plane before projecting into screen-space. It may be necessary to clip by the 4 planes defined by window bounds as well - to prevent points near the clip plane being too large or infinite - causing other calculations to fail.

Campbell Barton commented

2021-06-21 09:20:56 +02:00

Committing a fix shortly & closing as a duplicate of #32214.

Campbell Barton commented

2021-06-28 07:59:48 +02:00

Closed as duplicate of #32214

Campbell Barton closed this issue

2021-06-28 07:59:48 +02:00

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Circle Selection do not selects in X-Ray mode with close range to elements #89295