Rotation Constraint
The Rotation Constraint allows you to set limits on an object’s rotation and/or copy the rotation properties from a target object. These properties can be independently activated.
How to create a Rotation Constraint
Add a Rotation Constraint to an object
Use the Constraints section of the Inspector to add a Rotation Constraint to an object.
Choose a target
Use the new constraint’s fly-out menu to select a target for this constraint.
Test that the Rotation Constraint is working
Manipulating the target object now causes the constrained object to copy Rotation properties.
Strength
The Strength property determines how much the constrained object is affected.
A Strength of 0% means the constraint won’t have any effect.
A Strength of 50% means half the value from the target will be applied.
Transform Space
Source Space
Choose whether this constraint should use World or Local coordinates for the Source Space.
Destination Space
Choose whether this constraint should use World or Local coordinates for the Destination Space.
Min/Max Space
Choose whether this constraint should use World or Local coordinates for the Min/Max Space.
Offset
Allows the constraint owner to be manually offset from the constraint source.
Copy
Define the rate at which the rotation property is copied.
Min/Max
Use the numerical values to define the minimum and maximum limits of the constraint.