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Maniphest T58433

Limit distance constraint: reset distance does not work
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Description

System Information
Operating system: Linux
Graphics card: GTX 1060

Blender Version
Broken: 2.80, 2018-11-30

Short description of error
When you add a limit distance constraint to one bone and you select a bone as the target, the distance is not updated (still 0m). When you click on the button "Reset Distance", nothing happens. Distance is still 0m. You have to manually set the distance for this constraint.

Same issue for the limit distance constraint on an object.

Exact steps for others to reproduce the error

limit_distance_bone_constraint.blend596 KBDownload

In the file, I have added a limit distance on bone.001 and selected bone as the target and the distance is still 0m. When I click on "Reset Distance", nothing happens.

Revisions and Commits

rB Blender
rB6a80a786f88c Fix T58433: Limit Distance constraint distance not auto-computed.

Event Timeline

David Gayerie (Spoonless) created this task.Dec 1 2018, 3:03 PM
David Gayerie (Spoonless) removed a project: BF Blender.Dec 1 2018, 5:17 PM
Alexander Gavrilov (angavrilov) claimed this task.Dec 1 2018, 6:02 PM
Alexander Gavrilov (angavrilov) lowered the priority of this task from 90 to 50.
Alexander Gavrilov (angavrilov) changed the task status from Unknown Status to Resolved by committing rB6a80a786f88c: Fix T58433: Limit Distance constraint distance not auto-computed..Dec 1 2018, 6:03 PM
Alexander Gavrilov (angavrilov) added a commit: rB6a80a786f88c: Fix T58433: Limit Distance constraint distance not auto-computed..
Bastien Montagne (mont29) reassigned this task from Alexander Gavrilov (angavrilov) to Sergey Sharybin (sergey).Dec 1 2018, 6:07 PM
Bastien Montagne (mont29) added subscribers: Sergey Sharybin (sergey), Alexander Gavrilov (angavrilov), Bastien Montagne (mont29).

Problem is, this constraint (and probably others, like stretch to) reset that value to current distance to target inside of their evaluation code, which only has access to temp CoW data now, not orig constraint data anymore. @Sergey Sharybin (sergey) not sure how to fix, probably best way would be to move that to actual operator (and add callback to RNA too, to do initial setting when target are defined) ? :/

Bastien Montagne (mont29) reassigned this task from Sergey Sharybin (sergey) to Alexander Gavrilov (angavrilov).Dec 1 2018, 6:08 PM

@Alexander Gavrilov (angavrilov) ah you are quick! :)
But please do the same (at least for the strecth to, maybe others…).