Control

Control lets the player steer an object: with the crown, a finger drag, on-screen buttons, or a joystick. Use it for a paddle, a selector, a ship that slides left and right, or (with a drag that launches on release) a slingshot.

Settings

The card changes with the input you pick. These are always there:

Setting	What it does
input	crown, drag, button or joystick.
moves	left / right or up / down: the one direction the object can move. Not shown for joystick.

Crown

Setting	What it does
px per notch	How far one click of the crown moves the object.

Button

Setting	What it does
on event	The event that nudges this object. A Tappable button elsewhere sends it.
nudge (px)	How far each tap moves it. Use a negative number for the opposite button.

For left and right buttons, add two Control components on the same object: one listening for left with a nudge of -20, one for right with 20.

Joystick

A joystick is a base with a knob you drag. It does not move itself. It steers another object in any direction.

Setting	What it does
steers	The object the joystick moves, usually the player.
move speed (px/s)	How fast that object moves when the knob is pulled all the way.
max pull	How far the knob can be dragged from the centre. Must be above 0 or the stick does nothing.

The knob springs back to the centre when you let go.

Drag

With drag, the object follows your finger along its direction. Turn on launch on release to make it a slingshot.

Setting	What it does
launch on release	Letting go launches the shot, faster the further you pulled.
launch scale	Launch speed for each pixel pulled. Bigger is a stronger shot.
launch scale ×	Optional. A Number variable that multiplies launch scale for each shot (an upgrade). Start it at 1, not 0, or nothing launches.
max pull	The furthest you can pull, in px. 0 means no limit except the screen edge.
camera follows pull	Pans the camera to the end of the aim line while you pull, then lets go when you release. Works for a pouch in the game world; a pouch on the HUD doesn't pan the camera on a real watch.
landing marker	A World object that moves to where the shot will first hit something solid, while you pull. Point a Camera View at it to show the landing spot.
zoom with pull	The camera's zoom at a full pull. Below 1 zooms out as you pull harder, then eases back after the shot. 0 is off. Needs a Camera.
snap back	When you let go, the pouch springs home and wobbles past it instead of jumping back.
pull ticks	Small buzzes on the watch as you pull further. 0 is off. Needs max pull.
clear last shot	Launching a new shot removes the previous one, so shots stay where they land until the next launch.
launch prefab	Spawn this prefab and launch it, instead of launching the dragged object. The dragged object becomes the pouch.
launch roster	A list of prefabs to launch instead of always the same one (different birds, different ammo). Leave empty to use launch prefab.
roster index var	Shows once the roster has entries. Which roster entry launches next. Blank steps through the list one per shot. Set a Number variable to choose it yourself (a menu, arrows).
require min speed	Skip shots that are too weak, so a tap or tiny flick doesn't fire.
min launch speed	Shows with require min speed. The slowest launch that still fires, in px/s.
show aim line	A dotted arc while you pull. It curves with gravity and stops at the first solid thing.
line colour	Shows with show aim line. The arc's colour and opacity.
show below min	Shows with show aim line. Keep drawing the arc while the pull is still too weak to fire.

Building a slingshot

1. Make a pouch object and add Control with input set to drag and launch on release on.
2. Make your shot (a bird, a stone) a prefab with a dynamic Physics body and a Collider, and pick it as launch prefab.
3. Turn on show aim line and set max pull so the pull feels right.
4. Optional: add Tap In Flight to the shot's prefab for a mid-air dash.

Good to know

• Crown, drag and button control keep the object on screen.
• Games only. Works in Preview and on both Wear OS and Apple Watch.