getControllerGrip method
Returns a group representing the grip space of the XR controller.
Use this space for visualizing 3D objects that support the user in pointing
tasks like UI interaction.
Note: If you want to show something in the user's hand AND offer a
pointing ray at the same time, you'll want to attached the handheld object
to the group returned by getControllerGrip() and the ray to the
group returned by getController(). The idea is to have two
different groups in two different coordinate spaces for the same WebXR
controller.
@param {number} index - The index of the controller.
@return {Group} A group representing the grip space.
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Implementation
WebXRController? getControllerGrip(int index ) {
WebXRController? controller = _getController( index );
return controller?.getGripSpace();
}