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idea #83: IK target snap back



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Written by kakapo the 21 Nov 08 at 01:50. Category: Animation. Status: New
Description
it would be very helpful if there were the option to always make IK targets snap back to the bone they are attached too after moving them. maya has this option.

it doesn't seem like this would be hard to add (but i have no clue about the ik code)? just solve the IK and if the IK target isn't positioned on the bone anymore after the mouse button gets released then set its position back to the bone? it should be an option.

edit:
the new "limit distance" contraint is very overcomplicated for this purpose. you need a helper bone to prevent cyclic dependency problems and it's very fiddly to set the right distance.

why not have a simple checkbox in the IK solver constraint for enabling a snap back like described?


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AdminAdmin vilda (Blenderstorm admin) wrote on the 11 Apr 08 at 04:05
It would work actually as a distance constraint with the distance set to the ik chain length,from the root of the chain to the target. right?

kakapo wrote on the 11 Apr 08 at 14:48
yes, similar to the "limit distance" constraint but with "limit distance" it can be a bit fiddly to set the right distance. it would be nice if the IK contraint simply had an option/checkbox for this.

DeveloperDeveloper Briggs (Blender Developer) wrote on the 22 Apr 08 at 10:52
This is a good idea, but integrating it with constraints directly is probably misplaced.

Constraints should probably never modify object data, only the objects current matrix which is a calculated value. Instead this might make a good transform mode for bones.

Good idea though.


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