After duplicating a collection with rigidbody objects, the simulation doesn't apply to the new rigidbody objects #100588

New Issue

Sonny Campbell · 2022-08-23T14:50:49+02:00

Sonny Campbell commented

2022-08-23 14:50:49 +02:00

System Information
Operating system: Windows 11
Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU

Blender Version
Broken: master branch
Worked: Don't know if it ever worked

Short description of error
After duplicating a collection with rigidbody objects, the simulation doesn't apply to the new rigidbody objects

Steps to Reproduce

In a new blender project, add a new collection. Add a cube to the collection. Add a rigidbody to the cube. Verify that playing the simulation causes the object to fall under gravity.

Copy and paste the cube to create a new cube inside the collection. Move the new cube so both are visible. Verify that playing the simulation causes both cubes to fall under gravity.

In the outliner right-click on the collection and select "Duplicate Collection". Move the two new cubes so all four cubes are visible. Run the simulation.

The two cubes in the original collection will fall under gravity.
The two cubes in the duplicate collection do not move and are not affected by the simulation.

It appears the two cubes in the duplicated collection are not added to the RigidBodyWorld collection.

**System Information** Operating system: Windows 11 Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU **Blender Version** Broken: `master` branch Worked: Don't know if it ever worked **Short description of error** After duplicating a collection with rigidbody objects, the simulation doesn't apply to the new rigidbody objects **Steps to Reproduce** In a new blender project, add a new collection. Add a cube to the collection. Add a rigidbody to the cube. Verify that playing the simulation causes the object to fall under gravity. Copy and paste the cube to create a new cube inside the collection. Move the new cube so both are visible. Verify that playing the simulation causes both cubes to fall under gravity. In the outliner right-click on the collection and select "Duplicate Collection". Move the two new cubes so all four cubes are visible. Run the simulation. - The two cubes in the original collection will fall under gravity. - The two cubes in the duplicate collection do not move and are not affected by the simulation. ![image.png](https://archive.blender.org/developer/F13413505/image.png) It appears the two cubes in the duplicated collection are not added to the RigidBodyWorld collection. ![image.png](https://archive.blender.org/developer/F13413507/image.png)

Sonny Campbell commented

2022-08-23 14:50:49 +02:00

Added subscriber: @SonnyCampbell_Unity

Germano Cavalcante commented

2022-08-23 22:28:30 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-08-23 22:28:30 +02:00

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

Germano Cavalcante commented

2022-08-23 22:28:30 +02:00

I can confirm the problem.
It seems related to #100255 (After appending a scene containing rigid body objects, the RigidBodyWorld and RigidBodyConstraints directories are not saved.).
Note that there is currently no active development in the Rigid Body area. But perhaps the situation can improve with the future implementation of physics through nodes still being planned.

I can confirm the problem. It seems related to #100255 (After appending a scene containing rigid body objects, the RigidBodyWorld and RigidBodyConstraints directories are not saved.). Note that there is currently no active development in the Rigid Body area. But perhaps the situation can improve with the future implementation of physics through nodes still being planned.

Bastien Montagne commented

2022-08-24 11:19:57 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2022-08-24 11:19:57 +02:00

This has nothing to do with #100255...

Indeed this is likely just missing the 'rigid body' special case handling in that collection duplicating code. Given current situation of this feature, would classify it as known issue. It is trivial to add back the missing new objects to the RB collection manually, as a work-around.

This has nothing to do with #100255... Indeed this is likely just missing the 'rigid body' special case handling in that collection duplicating code. Given current situation of this feature, would classify it as known issue. It is trivial to add back the missing new objects to the RB collection manually, as a work-around.

Philipp Oeser removed the

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After duplicating a collection with rigidbody objects, the simulation doesn't apply to the new rigidbody objects #100588