Animation

P.Spring interpolates scalar values or native Unity structs through their registered spring spaces. Bind the spring directly to a named native prop. Period and damping configure the spring; P.Step supports manual advancement. Reduced motion snaps spring targets. Example. Full reference.

Animate a target source

Create the spring inside an owned renderer such as App.Mount. This fragment binds a Vector2 spring to the button's native anchoredPosition:

var target = P.Source(Vector2.zero);
var position = P.Spring(() => target.Value, period: .45, dampingRatio: .75);
return P.Button(
    "Move",
    anchoredPosition: position,
    onClick: () => target.Value = new Vector2(180, 0)
);

Changing the source changes the target; the button's native instance remains mounted. Pass the spring itself to the prop so the binding observes its changing value. Reading its value into a literal before constructing the view captures only that moment.

Motion and lifetime

Use period and dampingRatio to choose how the spring approaches its target. Set P.ReducedMotion.Value = true when the application should snap spring targets. This setting does not replace native Selectable color transition or dropdown fade settings; configure those on their native props.

Disposing the owning scope stops owned animation observers. Custom value types need a suitable SpringSpace<T>; the spring reference explains packing, unpacking and supported spaces. For a complete downloadable interface and the relationship between target state and animation, follow the spring animation guide.