Grease Pencil Fill Tool Breaks After Scroll-Wheel Zooming Window #82672

New Issue

Z · 2020-11-12T21:15:46+01:00

Z commented

2020-11-12 21:15:46 +01:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.30

Blender Version
Broken: version: 2.91.0 Beta, branch: master, commit date: 2020-11-02 13:28, hash: 42f6aada98
Also tested in 2.83.9 & 2.92 Alpha on Windows, and 2.91 Beta on Mac with same results.

Short description of error
If an 'unclosed' area made with grease pencil lines on its own layer overlaps and is 'closed' with grease pencil lines on a second layer, zooming the 2d workspace in and out will cause the fill tool to 'break' and fill the whole screen; even when the fill tool is set to: Advanced-Layers-Visible.

Exact steps for others to reproduce the error
Create closed shape on one layer. Create 'open' shape on second layer that overlaps and is closed by grease pencil lines from the first layer. Zoom in and out in workspace while using the fill tool in a separate 'fill' layer.
Please see attached .blend file and screen capture:

FillTest.blend

FillTest.mp4

I really hope this isn't just user error. Thank you for taking a look!

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.30 **Blender Version** Broken: version: 2.91.0 Beta, branch: master, commit date: 2020-11-02 13:28, hash: `42f6aada98` Also tested in 2.83.9 & 2.92 Alpha on Windows, and 2.91 Beta on Mac with same results. **Short description of error** If an 'unclosed' area made with grease pencil lines on its own layer overlaps and is 'closed' with grease pencil lines on a second layer, zooming the 2d workspace in and out will cause the fill tool to 'break' and fill the whole screen; even when the fill tool is set to: Advanced-Layers-Visible. **Exact steps for others to reproduce the error** Create closed shape on one layer. Create 'open' shape on second layer that overlaps and is closed by grease pencil lines from the first layer. Zoom in and out in workspace while using the fill tool in a separate 'fill' layer. Please see attached .blend file and screen capture: [FillTest.blend](https://archive.blender.org/developer/F9268260/FillTest.blend) [FillTest.mp4](https://archive.blender.org/developer/F9268249/FillTest.mp4) I really hope this isn't just user error. Thank you for taking a look!

Z commented

2020-11-12 21:15:46 +01:00

Added subscriber: @weedooweedoo

Richard Antalik commented

2020-11-13 05:37:52 +01:00

Added subscriber: @iss

Richard Antalik commented

2020-11-13 05:37:52 +01:00

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

Richard Antalik closed this issue

2020-11-13 05:37:52 +01:00

Richard Antalik self-assigned this 2020-11-13 05:37:52 +01:00

Richard Antalik commented

2020-11-13 05:37:53 +01:00

Thank you for report,
This is because strokes do have thickness, but they are constructed over 2D wires without thickness.
If you switch to edit mode, you can see that wires don't overlap. if you fix overlap manually, this won't happen.

Thank you for report, This is because strokes do have thickness, but they are constructed over 2D wires without thickness. If you switch to edit mode, you can see that wires don't overlap. if you fix overlap manually, this won't happen.

Richard Antalik commented

2020-11-13 05:47:39 +01:00

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

Richard Antalik reopened this issue

2020-11-13 05:47:39 +01:00

Richard Antalik commented

2020-11-13 05:47:39 +01:00

Added subscriber: @antoniov

Richard Antalik commented

2020-11-13 05:47:39 +01:00

Checking this a bit further, thickness is accounted for, but gap must be less then 1/2 of thickness which is not in your example.
Perhaps this could be improved, but I am not sure if this would be considered a bug.

I will reopen and ask @antoniov for opinion.

Checking this a bit further, thickness is accounted for, but gap must be less then 1/2 of thickness which is not in your example. Perhaps this could be improved, but I am not sure if this would be considered a bug. I will reopen and ask @antoniov for opinion.

Z commented

2020-11-13 06:44:59 +01:00

Thank you for your response.

Is there a reason why the fill would work normally at certain 'zooms' but not at other closer zooms if it was just the gap size between strokes? If the wire gap is greater than 1/2 the stroke thickness wouldn't it always overfill?

Also how would strokes of different sizes affect this?

Thanks!

Thank you for your response. Is there a reason why the fill would work normally at certain 'zooms' but not at other closer zooms if it was just the gap size between strokes? If the wire gap is greater than 1/2 the stroke thickness wouldn't it always overfill? Also how would strokes of different sizes affect this? Thanks!

Antonio Vazquez commented

2020-11-13 22:08:41 +01:00

This is a limitation of the current method used to fill areas. Actually, a flood fill is done using pixel information, so this method is affected by the zoom level.We are working on a new method of filling using Booleans, but this is a complex topic and will need some time. With the new approach, the fill will not be affected by zoom level anymore.

Richard Antalik commented

2020-11-14 02:01:37 +01:00

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

Z commented

2020-11-14 05:45:04 +01:00

Thank you for taking the time to answer this question, I really appreciate it. Looking forward to seeing where Grease Pencil goes in the future!

Philipp Oeser removed the

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Grease Pencil Fill Tool Breaks After Scroll-Wheel Zooming Window #82672