TypeConverter

Converts a value of type T to and from the AnimationVector the animation system runs on. Each animated type decomposes into a fixed set of float components — 1 for a scalar like Float, 2 for a size, 4 for a color — and the spring/tween machinery drives each component on its own, so a multi-component value carries a real per-component value and per-component velocity rather than being collapsed to one lossy scalar.

newVector mints an empty vector of the right shape (via AnimationVector.ofSize); toVector writes a value's components into a caller-owned vector so a per-frame animation allocates nothing.

A custom animated type implements all three methods, e.g. for a 3-component value:

object PointConverter : TypeConverter<Point> {
  override fun newVector(): AnimationVector = AnimationVector.ofSize(3)
  override fun toVector(value: Point, vector: AnimationVector) {
    vector[0] = value.x
    vector[1] = value.y
    vector[2] = value.z
  }
  override fun fromVector(vector: AnimationVector): Point =
      Point(vector[0], vector[1], vector[2])
}

Built-in Converters

• FloatTypeConverter / IntTypeConverter / DimenTypeConverter — 1 component

• ColorTypeConverter — 4 components (alpha, red, green, blue)

• IntSizeTypeConverter (see AnimatedSize) — 2 components (width, height)

See also

Inheritors