Rigid Body Constraints Cache does not Clear #111843

New Issue

rohan stevenson · 2023-09-03T13:15:53+02:00

rohan stevenson commented

2023-09-03 13:15:53 +02:00

System Information
Operating system: Linux-6.2.0-31-generic-x86_64-with-glibc2.35 64 Bits, X11 UI
Graphics card: NVIDIA GeForce RTX 3070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 535.86.05

Blender Version
Broken: version: 3.6.2, branch: blender-v3.6-release, commit date: 2023-08-16 16:43, hash: e53e55951e7a
Worked: (newest version of Blender that worked as expected)

Short description of error
Using rigid body constraints does not update its cache, even after making changes to the system leading to unexpected results.

Exact steps for others to reproduce the error

Playback attached blend file.
Note the physics is showing the linked chains as being struck by an object which is now removed from the project.
Making alterations or tweaking to force Blender to update the cache does not work as per this suggestion: https://www.youtube.com/watch?v=gbO1JpZCEfo
Changing any parameter of any participant of the simulation makes no difference.
Clearing unused data blocks did not work.
Changing the simulation speed did not work.
Changing links form active to passive did not work.

N.B. This situation arose because I was testing the rigid body constraints with "hinge" set to ensure they were pivoting along the correct axis. I used a simple cube animation with collision set with just 2 of the links to check the behaviour and once I was satisfied, I deleted the cube and removed the collision before duplicating the links and rigid body constraints. However, the rigid body world continued to behave as though it was being impacted by the cube. Absolutely nothing I have tried has worked to reset the cache.

**System Information** Operating system: Linux-6.2.0-31-generic-x86_64-with-glibc2.35 64 Bits, X11 UI Graphics card: NVIDIA GeForce RTX 3070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 535.86.05 **Blender Version** Broken: version: 3.6.2, branch: blender-v3.6-release, commit date: 2023-08-16 16:43, hash: `e53e55951e7a` Worked: (newest version of Blender that worked as expected) **Short description of error** Using rigid body constraints does not update its cache, even after making changes to the system leading to unexpected results. **Exact steps for others to reproduce the error** - Playback attached blend file. - Note the physics is showing the linked chains as being struck by an object which is now removed from the project. - Making alterations or tweaking to force Blender to update the cache does not work as per this suggestion: https://www.youtube.com/watch?v=gbO1JpZCEfo - Changing any parameter of any participant of the simulation makes no difference. - Clearing unused data blocks did not work. - Changing the simulation speed did not work. - Changing links form active to passive did not work. N.B. This situation arose because I was testing the rigid body constraints with "hinge" set to ensure they were pivoting along the correct axis. I used a simple cube animation with collision set with just 2 of the links to check the behaviour and once I was satisfied, I deleted the cube and removed the collision before duplicating the links and rigid body constraints. However, the rigid body world continued to behave as though it was being impacted by the cube. Absolutely nothing I have tried has worked to reset the cache.

Rigid Body Constraints.blend

2.1 MiB

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rohan stevenson added the

labels 2023-09-03 13:15:53 +02:00

Iliya Katushenock added the