Can't snap dynamic brush object to dynamic paint canvas object #87588

New Issue

Marcos Graf · 2021-04-17T21:06:54+02:00

Marcos Graf commented

2021-04-17 21:06:54 +02:00

Can't snap to dynamic paint canvas object.blend

System Information
Operating system: Linux-5.4.0-72-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.56

Blender Version
Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: 02948a2cab
Worked: (newest version of Blender that worked as expected)

Short description of error
Snap tools won't work if the selected object has a dynamic paint brush and the target object has a dynamic paint canvas

Exact steps for others to reproduce the error
Add dynamic paint as canvas to an object.
Add dynamic paint as brush to another object.
This object (brush) won't snap to the first one (canvas) (e.g. point, surface, ...)

(but the canvas object can snap to the brush object)
(and non dynamic paint objects can snap to both)

[Can't snap to dynamic paint canvas object.blend](https://archive.blender.org/developer/F9937748/Can_t_snap_to_dynamic_paint_canvas_object.blend) **System Information** Operating system: Linux-5.4.0-72-generic-x86_64-with-debian-bullseye-sid 64 Bits Graphics card: GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.56 **Blender Version** Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: `02948a2cab` Worked: (newest version of Blender that worked as expected) **Short description of error** Snap tools won't work if the selected object has a dynamic paint brush and the target object has a dynamic paint canvas **Exact steps for others to reproduce the error** Add dynamic paint as canvas to an object. Add dynamic paint as brush to another object. This object (brush) won't snap to the first one (canvas) (e.g. point, surface, ...) (but the canvas object can snap to the brush object) (and non dynamic paint objects can snap to both)

Marcos Graf commented

2021-04-17 21:06:54 +02:00

Added subscriber: @mitap

toddbaxx commented

2021-04-19 10:00:45 +02:00

(Migrated from localhost:3001)

Added subscriber: @toddbaxx

toddbaxx commented

2021-04-19 10:00:46 +02:00

(Migrated from localhost:3001)

This comment was removed by @toddbaxx

*This comment was removed by @toddbaxx*

Dalai Felinto commented

2021-04-19 10:32:00 +02:00

Added subscriber: @dfelinto

Philipp Oeser commented

2021-04-20 10:59:16 +02:00

Added subscribers: @mano-wii, @lichtwerk

Philipp Oeser commented

2021-04-20 10:59:16 +02:00

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

Philipp Oeser closed this issue

2021-04-20 10:59:16 +02:00

Philipp Oeser commented

2021-04-20 10:59:16 +02:00

In #82795#1056523, @mano-wii wrote:
Yes,objects that have dependencies such as DEG_OB_COMP_TRANSFORM or DEG_OB_COMP_GEOMETRY with the transformed object are ignored for snapping.
This avoids a kind of dependency cycle.
We could be less restricted in some cases, but in the case of the mirror modifier this behavior is expected.

The same is true here, this happens in flush_trans_object_base_deps_flag.
In the case of the influence being just Paint, it would actually make sense to lift the restriction, but it could very well be set to Displace, Weight (being used for deformations elsewhere) or Waves leading to such dependency cycle.

So, to sum it up, this is working as expected atm. [though it would have for improvement], @mano-wii: correct me if I am wrong.
For improvements though, please use other channels: https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests
For more information on why this isn't considered a bug, visit: https://wiki.blender.org/wiki/Reference/Not_a_bug

Thx reporting, will archive for now.

> In #82795#1056523, @mano-wii wrote: > Yes,objects that have dependencies such as `DEG_OB_COMP_TRANSFORM` or `DEG_OB_COMP_GEOMETRY` with the transformed object are ignored for snapping. > This avoids a kind of dependency cycle. > We could be less restricted in some cases, but in the case of the mirror modifier this behavior is expected. The same is true here, this happens in `flush_trans_object_base_deps_flag`. In the case of the influence being just `Paint`, it would actually make sense to lift the restriction, but it could very well be set to `Displace`, `Weight` (being used for deformations elsewhere) or `Waves` leading to such dependency cycle. So, to sum it up, this is working as expected atm. [though it would have for improvement], @mano-wii: correct me if I am wrong. For improvements though, please use other channels: https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests For more information on why this isn't considered a bug, visit: https://wiki.blender.org/wiki/Reference/Not_a_bug Thx reporting, will archive for now.

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Can't snap dynamic brush object to dynamic paint canvas object #87588