Hair particle selection broken in Point selection mode in specific blend file. #70259
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Reference: blender/blender#70259
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System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.35
Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash:
f6cb5f5449
Worked: (optional)
Short description of error
Selection of hair particles in "Point" selection mode has stopped working in my blend file. Most selection hotkeys and operations under the "Select" menu as well as box select no longer do anything. Some selection operations like Lasso select and Ctrl + Numpad "+" still work, but you cannot comb the hair event when it is selected. "Tip" selection mode works normally. Restarting Blender and reloading the project does not fix the issue.
Exact steps for others to reproduce the error
HairSelectionBug.blend
I don't know of steps to reproduce on new blend files, but using the above blend file where the bug has occurred:
Added subscriber: @Crazymonkay
Some hair particle selection methods no longer work in Point selection mode in specific blend files.to Hair particle selection broken in Point selection mode in specific blend file.Added subscriber: @lichtwerk
Can confirm in this particular file...
All seems to be fine if I append the body into a fresh file... checking...
Appending the collection is also fine.
Something in the scene is preventing the selection, you can also make a fresh new scene in your file and select the body, then
Object
>Make Links
>Objects to Scene
>Scene.001
.Everything is fine in
Scene.001
then.However, if you do this in a copied scene [that has been created with
Copy Settings
] then problems arise...Still checking...
more findings:
For some reason the PTCacheEditKeys are flagged
PEK_HIDE
.This also explains why lasso select partially works (because lasso loops with
LOOP_KEYS
, whereas e.g. box select loops withLOOP_VISIBLE_KEYS
).In this regard lasso select is actually wrong imho, shouldnt let you select those... also explains why combing is not working then (this wont work on hidden...)
Still need to wrap my head around the
PEK_HIDE
, but we are getting there :)Ha! found the culprit:
There is a setting (
particle_edit.use_fade_time
) that usually is only forEmitter
particles, and that makes particles be flaggedPEK_HIDE
under certain circumstances.For some reason this is turned ON in your scene.
This leads to a couple of issues (that need fixing -- see below), but to get you up and running quickly here is the woraround for now:
call
bpy.context.scene.tool_settings.particle_edit.use_fade_time = False
in your file and you are good to go...OK, now to fixing:
PE_hide_keys_time
(or other code should not respect that flag when editing hair)Working on fixes...
This issue was referenced by
e02ecd599b
Thank you for the very quick response and fix! All is working now :)
Changed status from 'Open' to: 'Resolved'