Vibration haptic feedback. This haptic feedback resource makes it possible to define a vibration based haptic feedback pulse that can be triggered through actions in the OpenXR action map. The amplitude of the pulse between [code]0.0[/code] and [code]1.0[/code]. The duration of the pulse in nanoseconds. Use [code]-1[/code] for a minimum duration pulse for the current XR runtime. The frequency of the pulse in Hz. [code]0.0[/code] will let the XR runtime chose an optimal frequency for the device used.