method

Tween.value

Tween.value(handle) -> int

Returns the current interpolated value of a tween handle this frame — the number the engine advanced it to. Read it each frame to drive a position, an alpha, a scale. Once every segment has finished the value rests on the final target; Tween.done reports when that has happened. Returns 0 for an invalid handle.

Parameters

handlethe tween handle to read

Example

program Demo {
  property Pos { x: int = 0 }
  property Tw { h: int = 0 }
  model Mover { Pos, Tw }
  handler Move phase Update {
    let p = World.prop_id("Pos")
    let t = World.prop_id("Tw")
    let e = World.query_next(t, 0)
    let h = World.get(e, t, World.field_id(t, "h"))
    World.set(e, p, World.field_id(p, "x"), Tween.value(h))
  }
}

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