The [AimModifier3D] rotates a bone to look at a reference bone.
</brief_description>
<description>
This is a simple version of [LookAtModifier3D] that only allows bone to the reference without advanced options such as angle limitation or time-based interpolation.
The feature is simplified, but instead it is implemented with smooth tracking without euler, see [method set_use_euler].
Sets relative option in the setting at [param index] to [param enabled].
If sets [param enabled] to [code]true[/code], the rotation is applied relative to the pose.
If sets [param enabled] to [code]false[/code], the rotation is applied relative to the rest. It means to replace the current pose with the [AimModifier3D]'s result.
If sets [param enabled] to [code]true[/code], it provides rotation with using euler.
If sets [param enabled] to [code]false[/code], it provides rotation with using rotation by arc generated from the forward axis vector and the vector toward the reference.
</description>
</method>
<methodname="set_use_secondary_rotation">
<returntype="void"/>
<paramindex="0"name="index"type="int"/>
<paramindex="1"name="enabled"type="bool"/>
<description>
If sets [param enabled] to [code]true[/code], it provides rotation by two axes. It is enabled only if [method is_using_euler] is [code]true[/code].