Wii Golf × TrackMan

Real swings, Wii Sports golf.

Hit a real ball into a TrackMan 4 radar and the shot plays out in Wii Sports Resort golf. A bridge turns the radar's numbers into the motion a Wiimote would have made and feeds it to the Dolphin emulator.

GitHub

Node.js
Python
WebSocket
Dolphin
TrackMan 4

What it does

May 2026

01
Swing a real club
TrackMan measures ball speed, launch angle, direction and spin, and the game gets a swing to match.
02
A fake Wiimote
Each shot becomes 60 Hz accelerometer and gyro data, sent to Dolphin the way a motion controller would send it.
03
Every shot commits
Drives, irons, wedges and chips all go through. Putts come out a bit strong for now, which beats them not firing.
04
A second way in
A Python bridge skips the swing detector and writes the ball's speed straight into the game's memory.

Signature

A swing made from a shot

TrackMan only knows what the ball did. The bridge works backwards to a swing: back, a pause at the top, down, follow through, scaled by ball speed so a drive winds up 180° and a chip about half that. The game can't tell it from a person holding a Wiimote.

How it works

Listening to the radar
The bridge subscribes to TrackMan 4's WebSocket on the local network and waits for each shot's measurement.
Building the swing
A smooth four-phase curve sets the gyro and accelerometer for every frame, with the gyro peaking at impact and a short accel spike at the same moment.
Talking to Dolphin
It runs a cemuhook DSU motion server on UDP port 26760, sending 80-byte packets that Dolphin treats as a MotionPlus Wiimote.
Tuned against the emulator
Dolphin caps the gyro at 2259°/s, and going over flattens the wave so hard shots read weaker. The comments in the source are the calibration history.

Design

System fonts

#16130F
#2D5F3F
#6A655D
#F6F5F2

No interface of its own: it runs in a terminal and the game is the screen.
Colours come from the README's badges: golf green on a warm near-black.

Next: Cerebro firmware