Unexpected Behavior - Smoke domain does not match viewport container #70868

New Issue

J. Kissel · 2019-10-16T09:04:17+02:00

J. Kissel commented

2019-10-16 09:04:17 +02:00

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.15

Blender Version
Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-16 21:02, hash: 76650402f3
Worked: (optional)

Short description of error
When the domainobject is modified in edit mode the domain calculation does not follow
I dont know how to say that but - "The Code Under the Hood" seems not to recognize this.

Exact steps for others to reproduce the error

Create a cube
go to edit mode
move verticies around -> e.g. Bottom to Zero instead of -1 and top to 2 instead of 1
leave edit mode and for savety apply trandformations
go to Physics Tab and make a domain out of the cube
add flow object press Play and play a few frames
turn on Debug Velocity
Velocity is not matching smoke visualization in vieport

it seems that recentering the Pivot fixes that

[Based on the default startup or an attached .blend file (as simple as possible)]

**System Information** Operating system: Windows-10-10.0.18362 64 Bits Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.15 **Blender Version** Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-16 21:02, hash: `76650402f3` Worked: (optional) **Short description of error** When the domainobject is modified in edit mode the domain calculation does not follow I dont know how to say that but - "The Code Under the Hood" seems not to recognize this. **Exact steps for others to reproduce the error** - Create a cube - go to edit mode - move verticies around -> e.g. Bottom to Zero instead of -1 and top to 2 instead of 1 - leave edit mode and for savety apply trandformations - go to Physics Tab and make a domain out of the cube - add flow object press Play and play a few frames - turn on Debug Velocity - Velocity is not matching smoke visualization in vieport **it seems that recentering the Pivot fixes that** [Based on the default startup or an attached .blend file (as simple as possible)]

J. Kissel commented

2019-10-16 09:04:17 +02:00

Added subscriber: @Masterheavy

Jeroen Bakker commented

2019-10-16 10:11:22 +02:00

Added subscriber: @Jeroen-Bakker

Jeroen Bakker commented

2019-10-16 10:11:22 +02:00

Might be related to #70678, not sure.

Jacques Lucke commented

2019-10-16 15:20:58 +02:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2019-10-16 15:20:58 +02:00

Don't know if this is the same issue, but I can confirm the issue described here.

debug_velocity_offset.blend

Open the file.
Play the animation.

Don't know if this is the same issue, but I can confirm the issue described here. [debug_velocity_offset.blend](https://archive.blender.org/developer/F7825681/debug_velocity_offset.blend) 1. Open the file. 2. Play the animation. ![image.png](https://archive.blender.org/developer/F7825685/image.png)

J. Kissel commented

2019-10-16 16:00:34 +02:00

Jupp - Looks the same.
if you now center the origin, ist gone.

Jupp - Looks the same. if you now center the origin, ist gone.

Germano Cavalcante commented

2019-10-16 22:51:32 +02:00

Added subscriber: @mano-wii

Clément Foucault was assigned by Germano Cavalcante

2019-10-16 22:51:32 +02:00

Germano Cavalcante commented

2019-10-16 22:51:32 +02:00

I can confirm.
As seen in the image attached by @JacquesLucke, the needles indicating speed are partially out of the domain.

I can confirm. As seen in the image attached by @JacquesLucke, the needles indicating speed are partially out of the domain.

Jeroen Bakker commented

2019-10-16 22:56:21 +02:00

I can take a look at this one. Is more in my alley than the fragment shader

Jeroen Bakker commented

2019-10-17 09:57:06 +02:00

Cause is inside the volume_velocity_vert.glsl here it is assumed that the velocity texture has to be drawn around the center of the object.

  vec3 pos = (vec3(cell_co) + 0.5) / vec3(volume_size);
  pos = pos * 2.0 - 1.0;

We should add an offset that has been calculated from the bounding box of the object cq mesh, currently checking if the the SmokeDomainSettings already has needed data.

is the worst case situation. Note that the voxel size debug cube is correct (due to D6076).

Object scale + pivot transform needs to be fixed.

Voxel size is also incorrect (visible when enabling adaptive domains)

Cause is inside the `volume_velocity_vert.glsl` here it is assumed that the velocity texture has to be drawn around the center of the object. ``` vec3 pos = (vec3(cell_co) + 0.5) / vec3(volume_size); pos = pos * 2.0 - 1.0; ``` We should add an offset that has been calculated from the bounding box of the object cq mesh, currently checking if the the SmokeDomainSettings already has needed data. ![image.png](https://archive.blender.org/developer/F7828865/image.png) is the worst case situation. Note that the voxel size debug cube is correct (due to [D6076](https://archive.blender.org/developer/D6076)). Object scale + pivot transform needs to be fixed. Voxel size is also incorrect (visible when enabling adaptive domains)

Clément Foucault commented

2019-10-29 17:39:27 +01:00

Changed status from 'Open' to: 'Resolved'

Clément Foucault closed this issue

2019-10-29 17:39:27 +01:00

Clément Foucault commented

2019-10-29 17:39:27 +01:00

This seems to have been fixed.

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Unexpected Behavior - Smoke domain does not match viewport container #70868