[Mantaflow] Wrong fluid mesh position #72644

New Issue

Pavel Blend · 2019-12-22T17:09:44+01:00

Pavel Blend commented

2019-12-22 17:09:44 +01:00

System Information
Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: AMD Radeon HD 7560D ATI Technologies Inc. 4.5.13399 Core Profile Context 15.200.1062.1004

Blender Version
Broken: version: 2.82 (sub 6), branch: master, commit date: 2019-12-20 00:09, hash: c3782ebf44
Worked: (optional)

Short description of error
The liquid mesh has an incorrect position.

Exact steps for others to reproduce the error
If you bake the particles in this scene and then bake the mesh, you can see this error:
test_02.zip

**System Information** Operating system: Windows-7-6.1.7601-SP1 64 Bits Graphics card: AMD Radeon HD 7560D ATI Technologies Inc. 4.5.13399 Core Profile Context 15.200.1062.1004 **Blender Version** Broken: version: 2.82 (sub 6), branch: master, commit date: 2019-12-20 00:09, hash: `c3782ebf44` Worked: (optional) **Short description of error** The liquid mesh has an incorrect position. **Exact steps for others to reproduce the error** If you bake the particles in this scene and then bake the mesh, you can see this error: [test_02.zip](https://archive.blender.org/developer/F8240463/test_02.zip)

Pavel Blend commented

2019-12-22 17:09:44 +01:00

Added subscriber: @Pavel_Blend

blender-admin commented

2019-12-22 17:09:44 +01:00

#76967 was marked as duplicate of this issue

blender-admin commented

2019-12-22 17:09:44 +01:00

#76076 was marked as duplicate of this issue

blender-admin commented

2019-12-22 17:09:44 +01:00

#73703 was marked as duplicate of this issue

Pavel Blend commented

2019-12-22 17:10:00 +01:00

![01.jpg](https://archive.blender.org/developer/F8240473/01.jpg)

Juan Gea commented

2019-12-24 12:24:10 +01:00

Added subscriber: @juang3d

Juan Gea commented

2019-12-24 12:24:10 +01:00

This is happening because the domain pivot is not in the correct place.

I don't remember if it has to be in the geometry center or in the world center, but if you center the pivot and rebake the sim, everything should be in the correct place.

Having mantaflow to counteract a wrongly placed pivot is more like an improvement (a very welcome one, and possibly an easy one) than a bug IMHO :)

This is happening because the domain pivot is not in the correct place. I don't remember if it has to be in the geometry center or in the world center, but if you center the pivot and rebake the sim, everything should be in the correct place. Having mantaflow to counteract a wrongly placed pivot is more like an improvement (a very welcome one, and possibly an easy one) than a bug IMHO :)

Firepal commented

2019-12-24 19:33:30 +01:00

Added subscriber: @Firepal

Firepal commented

2019-12-24 19:33:30 +01:00

![image.png](https://archive.blender.org/developer/F8242697/image.png)

Germano Cavalcante commented

2019-12-27 16:47:01 +01:00

Added subscribers: @sebbas, @mano-wii

Germano Cavalcante commented

2019-12-27 16:47:01 +01:00

If this worked in the previous fluid code, this could be considered a regression.
But it may also be a known limitation (in this case it would be nice to be described in the manual ).

@sebbas, what do you think, bug or limitation?

If this worked in the previous fluid code, this could be considered a regression. But it may also be a known limitation (in this case it would be nice to be described in the [manual ](https://docs.blender.org/manual/en/latest/physics/fluid/types/domain.html)). @sebbas, what do you think, bug or limitation?

Germano Cavalcante commented

2020-01-15 15:18:01 +01:00

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

Germano Cavalcante commented

2020-01-15 15:18:01 +01:00

I tested on the system from previous versions (without mantaflow), and the fluid position corresponded to the position of the objects used, even with the origin of the domain not in the center of it.
So it's a regression.

I tested on the system from previous versions (without mantaflow), and the fluid position corresponded to the position of the objects used, even with the origin of the domain not in the center of it. So it's a regression.

Peter commented

2020-02-04 08:59:22 +01:00

Added subscriber: @PGT2

Peter commented

2020-02-04 08:59:22 +01:00

I had the problem as well with latest builds, i found a manual fix that i think would be easy to code.
Before baking set the domain origin to the world center.
Then in edit mode adjust size and position of where you want your domain to be.

After the baking is the done set the domain origin to center of volume (in later frames where it still a a cube, ea use a past frame or frame -1).
(One might use empties for those 2 positions if one needs to bake more then once).

Of course it should be solved in code, but the displacement is exactly solved with this workaround and might be coded as well

I had the problem as well with latest builds, i found a manual fix that i think would be easy to code. Before baking set the domain origin to the world center. Then in edit mode adjust size and position of where you want your domain to be. After the baking is the done set the domain origin to center of volume (in later frames where it still a a cube, ea use a past frame or frame -1). (One might use empties for those 2 positions if one needs to bake more then once). Of course it should be solved in code, but the displacement is exactly solved with this workaround and might be coded as well

Brecht Van Lommel commented

2020-02-11 11:40:13 +01:00

Added subscriber: @NahuelBelich

Richard Antalik commented

2020-04-27 19:43:26 +02:00

Added subscribers: @ScottVanKirk, @ankitm

Ankit Meel commented

2020-05-02 11:51:22 +02:00

#76312 (Liquid simulation Particle/Mesh vanishes - Only Domain is rendered)
gets worse after render. Confirmed separately.

#76312 (Liquid simulation Particle/Mesh vanishes - Only Domain is rendered) gets worse after render. Confirmed separately.

Ankit Meel commented

2020-05-22 13:37:13 +02:00

Added subscriber: @Vyach

RAM commented

2020-05-22 17:03:13 +02:00

Added subscriber: @CrossmindStudio

RAM commented

2020-05-22 17:03:13 +02:00

to get the fluid mesh at right position, the original has to in the exact center of the domain object.
Else the mesh is offset by a margin of origin offset( from center).

to get the fluid mesh at right position, the original has to in the exact center of the domain object. Else the mesh is offset by a margin of origin offset( from center).

Jacques Lucke commented

2020-05-27 13:06:40 +02:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2020-05-27 13:06:40 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Jacques Lucke closed this issue

2020-05-27 13:06:40 +02:00

Jacques Lucke self-assigned this 2020-05-27 13:06:40 +02:00

Jacques Lucke commented

2020-05-27 13:06:40 +02:00

This has been fixed by b44101950d.

This has been fixed by b44101950d.

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[Mantaflow] Wrong fluid mesh position #72644