Auto IK doesn't respect its Length setting #52224

New Issue

Alex · 2017-07-30T02:43:08+02:00

Alex commented

2017-07-30 02:43:08 +02:00

System Information
Intel Core 2 Quad, 8 Gb RAM, NVidia GeForce GTX 960 2GB
Windows 7 x64

Blender Version
Broken: 2.78.6 fb1cd76
Worked: 2.78c and older daily builds up to a certain point

Short description of error
AutoIK option seems to forget the number of AutoIK Length assigned to it every time you stop moving the bone.

Exact steps for others to reproduce the error
You can use provided file to test this - open the file and try to move the selected bone. You will notice that Auto IK uses all chain despite the fact that its length is set to 4. If you change the segment length it will work properly until you release the mouse.
AutoIK_Bug.blend

Open Blender, create an Armature and make a chain of bones.
In Tools - Options turn on Auto IK. Start moving the last bone in the chain and set IK Length to 2 or 3. Notice that Auto IK respects that change.
Release the mouse and drag again.

In 2.78c and some earlier daily builds everything will work as expected.
In 2.78.6 fb1cd76 IK chain will act as if chain length is not set despite showing fixed length.

**System Information** Intel Core 2 Quad, 8 Gb RAM, NVidia GeForce GTX 960 2GB Windows 7 x64 **Blender Version** Broken: 2.78.6 fb1cd76 Worked: 2.78c and older daily builds up to a certain point **Short description of error** AutoIK option seems to forget the number of AutoIK Length assigned to it every time you stop moving the bone. **Exact steps for others to reproduce the error** You can use provided file to test this - open the file and try to move the selected bone. You will notice that Auto IK uses all chain despite the fact that its length is set to 4. If you change the segment length it will work properly until you release the mouse. [AutoIK_Bug.blend](https://archive.blender.org/developer/F685988/AutoIK_Bug.blend) 1. Open Blender, create an Armature and make a chain of bones. 2. In Tools - Options turn on Auto IK. Start moving the last bone in the chain and set IK Length to 2 or 3. Notice that Auto IK respects that change. 3. Release the mouse and drag again. - In 2.78c and some earlier daily builds everything will work as expected. - In 2.78.6 fb1cd76 IK chain will act as if chain length is not set despite showing fixed length.

Alex commented

2017-07-30 02:43:08 +02:00

Changed status to: 'Open'

Alex commented

2017-07-30 02:43:08 +02:00

Added subscriber: @SpectreFirst

Bastien Montagne commented

2017-07-31 16:57:22 +02:00

Added subscribers: @ideasman42, @brecht, @mont29

Bastien Montagne commented

2017-07-31 16:57:22 +02:00

Confirmed, looks like a regression (unless it was changed on purpose)… @ideasman42 , @brecht, think you are those who know that code best, mind checking? thanks.