Dart

Dart

setMode(.pointer) · posX, posY, shotTriggered, throwPower

Dart is a 501-style board game on a 160×90 pixel canvas (phone + optional TV crop). You aim with continuous tilt and throw with a pull-back → forward motion (same gesture family as Bowling).

How you play

1. Connect and calibrate from the sample app menu.
2. Open Dart — optional lobby lets you pick solo/duo, names, and TV (AirPlay) before the match.
3. Wait for the 5…1 countdown, then play.
4. Tilt to move the crosshair on the board (posX / posY via pointer mapping + play zone).
5. Pull the cap back (BACK phase), then flick forward (FORWARD) to release a dart.
6. Three darts per turn; scores subtract from 501 (or bust rules in logic).
7. In multiplayer, press the cap button when prompted to start your turn.

Play zone

The sample shows a green / yellow / red band (DartPlayZone) — staying in the good band improves aim sensitivity. Calibrate per player profile when offered.

VeltoKit mapping

Setting	Value
MotionMode	.pointer (aim) + gesture FSM inside game
Aim	posX, posY, enriched sensors (tilt/gyro)
Throw	shotTriggered + throwPower (0…1) from gesture detector
UI hint	gesturePrimed while pulled back
Turn gate (multi)	sensors.click / button edge

GameManager tightens pointer smoothing for Dart (referenceDriftEnabled, lower deadzone) when the game loads.

The game also uses DartThrowController and DartGripMapping — port of the throw FSM described in Gestures.

Integrate in your app

let motion = MotionSDK()
motion.setMode(.pointer)
motion.connect()

func tick(dt: TimeInterval) {
  let input = motion.pollInput(deltaTime: dt)

  aimX = centerX + input.posX * aimReach
  aimY = centerY + input.posY * aimReach

  if input.shotTriggered {
    releaseDart(power: input.throwPower, at: aimX, aimY)
  }
}

For production feel, read input.sensors if you replicate the sample’s play-zone and per-player calibration.

Sample app source

File	Role
app/Games/DartGame.swift	Scoring, turns, aim, throw resolution
app/Games/DartArenaScene.swift	Board rendering
app/Games/DartThrowController.swift	Pull → throw FSM
app/Games/DartPlayZone.swift	Aim quality bands
app/Engine/DartSession.swift	Match state, TV lobby
app/UI/DartGameView.swift	SwiftUI shell

TV: AirPlay route in lobby; TV shows the board, phone stays the controller.

Tips

• Throw is gesture-first — practice a clear back-then-forward arc; see Gestures.
• If aim drifts, run calibration again or tune pointerSensitivity in Configuration.
• Start with solo before duo + turn gates.

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