New to V2.1: 1EF

1EF noise filter now works as a Blueprint Component, no need for complicated object filtering.

see demo "1EF" map for setup.

Prerequisite for Vive Tracker

• Enable LiveLinkXR Plugin
• Add Preprocessor --> Transform Axis Switch --> set Orientation Axis Z --> X, X --> Z

Prerequisite for Realsense T265 Tracker

• kougaku's RealSense OSC sender .exe ( https://github.com/kougaku/RealSenseOSC )
• for 4.25 - Epic's OSC Plugin
• for 4.26 - monsieurgustaf's OSC plugin ( Epic's 4.26 OSC do not work with this sender, you have to recompile this plugin https://github.com/monsieurgustav/UE4-OSC )

Options

• separate cutoff and beta for Location and Rotation
• Button to Reinitialize after you update the parameters ( calls constructor )
• disable and enable filter checkbox

1EF BP Component

You can use this Component in your own blueprint to get 1EF filtering, check ViveTracker_1EF or T265_OSC_1EF as sample implementation

Thank You:

Greg Corson for the Vive Puck model, help in analyzing stabilization. Aiden Wilson on how to use LivelinkXR plugin

DEPRECATED: OneEuroBlueprint V1.0

One Euro Noise Filter in UE4.26 Blueprint for Vive Trackers. White paper (https://cristal.univ-lille.fr/~casiez/1euro/) By Géry Casiez

Setup Unfiltered Tracker

1. add "Tracker_Unfiltered" to the scene. the coordinate will be your SteamVR Root a. Change "Tracker To Use" parameter to your Tracker/controller's Livelink ID
2. add "TrackerOffsetter_Unfiltered to the scene. a. select your Tracker_Unfiltered Actor as "Parent" b. expand "Offset" and adjust offset as you wish. c. uncheck "Guide Visible" to hide the offset guide d. select any Actor as "Child" ( Cine Camera, BP Camera, plane, lightsaber, mesh, etc).

Setup Filtered Tracker

1. add "Tracker_Filtered" to the scene. b. you can play around with mincutoff, rate, and beta for stabilization ( i dont see much change, i might have bad default or global variable issue, but the default value works OK).

According to the paper: "Note that parameters fcmin and beta have clear conceptual relationships: if high speed lag is a problem, increase beta; if slow speed jitter is a problem, decrease fcmin."

2. add "TrackerOffsetter_Filtered" a. select your Tracker_filtered actor as Parent. b. Offset, Child, and Guide Visible works like before