Removing Effectors (from a Collection, or deleting corresponding object) does not refresh physics, hair properly #82512

New Issue

Vyacheslav Kobozev · 2020-11-08T20:39:04+01:00

2020-11-08 20:39:04 +01:00

System Information
Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71

Blender Version
Broken: version: 2.83.8, branch: master, commit date: 2020-10-21 08:12, hash: 5949b796f0

Desription
Hairs do not react to force deleting.

To reproduce
Open file, delete force field object.
Hair system will keep it`s deformed shape, despite force do not exist anymore.

2020-11-08_22-34-26.mp4
late responce.blend

in build_effector_relations the relation is properly not built anymore, but there is no way to detect if this actually changed compared to the previous state.
And since nothing else changed in participating objects (e.g. it doesnt even refresh if you have two forcefields and remove one of them), no "proper" update happens.

**System Information** Operating system: Windows-7-6.1.7601-SP1 64 Bits Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71 **Blender Version** Broken: version: 2.83.8, branch: master, commit date: 2020-10-21 08:12, hash: `5949b796f0` **Desription** Hairs do not react to force deleting. **To reproduce** Open file, delete force field object. Hair system will keep it`s deformed shape, despite force do not exist anymore. [2020-11-08_22-34-26.mp4](https://archive.blender.org/developer/F9240355/2020-11-08_22-34-26.mp4) [late responce.blend](https://archive.blender.org/developer/F9240351/late_responce.blend) - in `build_effector_relations` the relation is properly **not** built anymore, but there is no way to detect if this actually changed compared to the previous state. And since nothing else changed in participating objects (e.g. it doesnt even refresh if you have two forcefields and remove one of them), no "proper" update happens.

Vyacheslav Kobozev commented

2020-11-08 20:39:04 +01:00

Added subscriber: @Vyach

blender-admin commented

2020-11-08 20:39:04 +01:00

#64985 was marked as duplicate of this issue

Philipp Oeser commented

2020-11-09 10:27:08 +01:00

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

Philipp Oeser commented

2021-01-27 15:20:17 +01:00

Added subscribers: @JacquesLucke, @Sergey, @lichtwerk

Philipp Oeser commented

2021-01-27 15:20:17 +01:00

This is tightly related to #64985 (Effector Collection system is not updating) (if not the same), touches #60945.

In a way, removing an object from the effectors collection or deleting said object is the same:

in build_effector_relations the relation is properly not built anymore, but there is no way to detect if this actually changed compared to the previous state.
And since nothing else changed in participating objects (e.g. it doesnt even refresh if you have two forcefields and remove one of them), no "proper" update happens.

@JacquesLucke , @Sergey: can you confirm?

This is tightly related to #64985 (Effector Collection system is not updating) (if not the same), touches #60945. In a way, removing an object from the effectors collection or deleting said object is the same: - in `build_effector_relations` the relation is properly **not** built anymore, but there is no way to detect if this actually changed compared to the previous state. And since nothing else changed in participating objects (e.g. it doesnt even refresh if you have two forcefields and remove one of them), no "proper" update happens. @JacquesLucke , @Sergey: can you confirm?

Jacques Lucke commented

2021-01-27 16:30:18 +01:00

Yeah, this is a more general issue. The boolean modifier and the Point Instance node in geometry nodes are effected by it as well.

Philipp Oeser changed title from ~~Hair system no refreshment after force delete.~~ to Removing Effectors (from a Collection, or deleting corresponding object) does not refresh physics, hair properly

2021-01-27 16:55:25 +01:00

Philipp Oeser commented

2021-01-27 16:56:24 +01:00

Added subscriber: @ClemensRudolph

Philipp Oeser removed the

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Removing Effectors (from a Collection, or deleting corresponding object) does not refresh physics, hair properly #82512