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If you want to document Blender 2.5 features please edit pages under Doc:2.5/Manual.
If a "2.5" page doesn't exist please copy the text from 2.4x Manual and edit the new page (i.e. you should paste the wikitext from this 2.4x page to this new 2.5x page and then update the latter with 2.5 features)


[edit] Copy Rotation Constraint

Mode: Object Mode and Pose Mode

Panel: Object Context → Constraints

Hotkey: F7

[edit] Description

Copy rotation causes one object to match the rotation of a target object. For bones, a local option will appear, allowing you to use local space. Imagine you have a bone pointing up and a bone pointing down. If you use local space, each can point different directions, but when the target bone moves to its left, the affected bone will move it to its left.

Image:RotConstraint1.jpg Image:RotConstraint2.jpg

Left: Using global space. Right: Using local space.


[edit] Options

Target
Object of which rotation to copy.
X Y Z
Axis to constraint. Use the button with the minus sign (-) to invert it.

[edit] Example

Here is one good use of the rotation constraint and local space. By setting the influence value to 0.5, the small bone will rotate half as far as the target. This is useful for character joints.