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GPencil Swirl Effect not working when control object is in origin
Closed, ResolvedPublic

Description

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.86

Blender Version
Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-06-28 19:44, hash: rB5762137f3522
Worked: (optional)

Short description of error
When using the Swirl Effect for a grease pencil object, GP object disappears at default setting radius =100px and Angle =90 no matter if using empty or another object in the Object field.
The only setting that shows the GP object at all and unaltered is when Radius = 0. Doesn't matter what setting is for Angle, nothing happens.

Exact steps for others to reproduce the error
Go to Object Mode and add Grease Pencil/Monkey.
Add Empty: Plain Axes or any type
Select GP Monkey and Select Effects button
Choose Swirl Effect in Add Effects drop down
Object field: choose Empty
The GP Monkey disappears, change radius to 0 and GP Monkey reappears but no swirl.

Related Objects

Event Timeline

Antonio Vazquez (antoniov) lowered the priority of this task from Needs Triage by Developer to Needs Information from User.Jun 29 2019, 10:33 AM

I cannot reproduce it. Be sure you enable the right Viewport Shading mode.

Yes, already in the correct Viewport Shading. Its the default 2d animation.
Please see attached pics & blend:

Bastien Montagne (mont29) raised the priority of this task from Needs Information from User to Waiting for Developer to Reproduce.Jul 23 2019, 5:42 PM
Antonio Vazquez (antoniov) lowered the priority of this task from Waiting for Developer to Reproduce to Confirmed, Medium.Jul 23 2019, 10:30 PM

I have found the bug and it's only when the control object is in origin. I have a fix ready, but as this is not critical, I will apply after 2.80 release.

Antonio Vazquez (antoniov) renamed this task from Grease Pencil Swirl Effect not working to GPencil Swirl Effect not working when control object is in origin.Jul 23 2019, 10:31 PM