Transform constraints not working with rigid body simulation #63028

New Issue

Zak Tab · 2019-03-27T21:19:33+01:00

Zak Tab commented

2019-03-27 21:19:33 +01:00

System Information
Operating system: Ubuntu 16.04
Graphics card: MSI 1080Ti

Blender Version
Broken: 2.80, 337eb8c1de, master, 2019-03-27,
Worked: 2.80, 8beab3e339, master, 2019-01-21

Short description of error
The new blender release (as of hash: 936014ea8c), seems to have disabled constraints from animations.
If you set a Minimum Z for a rigid body object, it will ignore that minimum.

Exact steps for others to reproduce the error

Open the default room.
Place the cube at (0, 0, 5)
Add “Active” rigid body to the cube
Add “Limit Location” object constraint and check minimum Z = 0
Press play

In previous versions, the cube would drop and stop at z = 0, but now it falls to -infinity.

**System Information** Operating system: Ubuntu 16.04 Graphics card: MSI 1080Ti **Blender Version** Broken: 2.80, 337eb8c1de4c, master, 2019-03-27, Worked: 2.80, 8beab3e33922, master, 2019-01-21 **Short description of error** The new blender release (as of hash: 936014ea8c74), seems to have disabled constraints from animations. If you set a Minimum Z for a rigid body object, it will ignore that minimum. **Exact steps for others to reproduce the error** - Open the default room. - Place the cube at (0, 0, 5) - Add “Active” rigid body to the cube - Add “Limit Location” object constraint and check minimum Z = 0 - Press play In previous versions, the cube would drop and stop at z = 0, but now it falls to -infinity.

Zak Tab commented

2019-03-27 21:19:33 +01:00

Added subscriber: @zakleap

William Reynish commented

2019-03-28 09:48:54 +01:00

Added subscriber: @WilliamReynish

Sergey Sharybin was assigned by William Reynish

2019-03-28 09:48:54 +01:00

William Reynish commented

2019-03-28 09:48:54 +01:00

Can confirm.

In 2.79, the constraint was taken into account when using rigid body physics, but in the latest beta it is not.

Can confirm. In 2.79, the constraint was taken into account when using rigid body physics, but in the latest beta it is not.

Sergey Sharybin was unassigned by Dalai Felinto

2019-12-23 16:34:47 +01:00

Dalai Felinto commented

2019-12-23 16:34:47 +01:00

Added subscriber: @Sergey

Jacques Lucke commented

2020-09-23 12:53:32 +02:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2020-09-23 12:53:32 +02:00

#63028.blend

The issue is that the constraints are evaluated before the rigid body simulation.

I wonder if it makes to evaluate constraints before and after the simulation.
It might make sense to reclassify this as Known Issue. @Sergey, what do you think?

[#63028.blend](https://archive.blender.org/developer/F8911718/T63028.blend) The issue is that the constraints are evaluated before the rigid body simulation. ![image.png](https://archive.blender.org/developer/F8911728/image.png) ![T63028_depsgraph.svg](https://archive.blender.org/developer/F8911732/T63028_depsgraph.svg) I wonder if it makes to evaluate constraints before and after the simulation. It might make sense to reclassify this as Known Issue. @Sergey, what do you think?

Sergey Sharybin commented

2020-09-23 12:56:29 +02:00

I wonder if it makes to evaluate constraints before and after the simulation.

I do not think this is the correct design.

> I wonder if it makes to evaluate constraints before and after the simulation. I do not think this is the correct design.

Pauan commented

2020-10-15 14:36:23 +02:00

Added subscriber: @pauanyu_blender

Philipp Oeser changed title from ~~New Blender release disables constraints from animation~~ to Transform constraints not working with rigid body simulation

2021-06-02 13:14:58 +02:00

Philipp Oeser removed the

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Transform constraints not working with rigid body simulation #63028