Dynamic Topology Undo Applied to Wrong Mesh #39196

New Issue

Steve · 2014-03-15T05:48:19+01:00

Steve commented

2014-03-15 05:48:19 +01:00

System Information
Ubuntu 13.10 64 bit, Nvidia Geforce GTX 770

Blender Version
Broken: 2.70 RC, Hash 2525f9c

Short description of error
After using dynamic topology on a mesh, then switching to another mesh and using dynamic topology on it, and then undoing a few times, the topology of the first mesh is applied to the second.

Exact steps for others to reproduce the error
Start with default cube. Duplicate and move it. Select the original cube, and enter sculpt mode and select dynamic topology. Sculpt on the cube. Go to object mode, select the second cube, and enter sculpt mode and enable dynamic topology. Sculpt something (tested with a single stroke to create a single undo step). Hit Ctrl-Z to undo several time, and the topology of the original cube will have replaced this topology.

**System Information** Ubuntu 13.10 64 bit, Nvidia Geforce GTX 770 **Blender Version** Broken: 2.70 RC, Hash 2525f9c **Short description of error** After using dynamic topology on a mesh, then switching to another mesh and using dynamic topology on it, and then undoing a few times, the topology of the first mesh is applied to the second. **Exact steps for others to reproduce the error** Start with default cube. Duplicate and move it. Select the original cube, and enter sculpt mode and select dynamic topology. Sculpt on the cube. Go to object mode, select the second cube, and enter sculpt mode and enable dynamic topology. Sculpt something (tested with a single stroke to create a single undo step). Hit Ctrl-Z to undo several time, and the topology of the original cube will have replaced this topology.

Steve commented

2014-03-15 05:48:19 +01:00

Changed status to: 'Open'

Steve commented

2014-03-15 05:48:19 +01:00

Added subscriber: @romulox_x

Joel Godin commented

2014-03-16 03:37:13 +01:00

Added subscriber: @joel.godin

Joel Godin commented

2014-03-16 03:37:13 +01:00

Yes, does it here on OSX as well. Hash 3d3031d1

Olson Burry commented

2014-03-18 15:42:00 +01:00

Added subscriber: @OliverBurn

Olson Burry commented

2014-03-18 15:42:00 +01:00

Same, RC2, Linux mint 15 64bit, GTX275

There's a short screencast of it happening:

https://dl.dropboxusercontent.com/u/34465710/bugs/scuptstrangeundo.mp4.zip

Same, RC2, Linux mint 15 64bit, GTX275 There's a short screencast of it happening: https://dl.dropboxusercontent.com/u/34465710/bugs/scuptstrangeundo.mp4.zip

Bastien Montagne commented

2014-03-19 20:34:47 +01:00

Added subscriber: @mont29

Antonis Ryakiotakis was assigned by Bastien Montagne

2014-03-19 20:36:45 +01:00

Bastien Montagne commented

2014-03-19 20:36:45 +01:00

Antony, I bet you’ll be delighted to handle this one too? ;)

Antonis Ryakiotakis commented

2014-03-19 21:05:47 +01:00

This is a duplicate, I'll check it later

Antonis Ryakiotakis commented

2014-03-21 15:44:35 +01:00

I have been trying to fix this for the past 2 days. Making sure the undo entries get cleaned up on undo if we detect another object's entry is easy. What is extremely hard however, is making sure the bmesh log entries stay consistent throughout cleanup/redo/undo and selecting different objects. I have more or less found a way that works but it's still possible to break this somehow. Needless to say, finding ways to crash the fixes is a difficulty in itself.

Current behaviour can also crash if one is adventurous and I keep thinking it might be a good idea to disallow switching objects while in dyntopo mode altogether.

However it is time to move to something else.

I will attach patch with current state for later.

I have been trying to fix this for the past 2 days. Making sure the undo entries get cleaned up on undo if we detect another object's entry is easy. What is extremely hard however, is making sure the bmesh log entries stay consistent throughout cleanup/redo/undo and selecting different objects. I have more or less found a way that works but it's still possible to break this somehow. Needless to say, finding ways to crash the fixes is a difficulty in itself. Current behaviour can also crash if one is adventurous and I keep thinking it might be a good idea to disallow switching objects while in dyntopo mode altogether. However it is time to move to something else. I will attach patch with current state for later.

blender-admin commented

2014-05-13 21:05:23 +02:00

This issue was referenced by 33df6aa12e

This issue was referenced by 33df6aa12ea6f627b5b238e6eec64cffb2acdbd4

Antonis Ryakiotakis commented

2014-05-13 21:12:35 +02:00

Changed status from 'Open' to: 'Resolved'

Antonis Ryakiotakis closed this issue

2014-05-13 21:12:35 +02:00

Antonis Ryakiotakis commented

2014-05-13 21:12:35 +02:00

Closed by commit 33df6aa12e.

Closed by commit 33df6aa12e.

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Dynamic Topology Undo Applied to Wrong Mesh #39196