getVelocity
Writes the current per-component velocity at the given elapsed time into velocity, in float-space units per second.
Velocity is expressed per component so interruption preserves each component's motion independently — a size retargeted mid-flight carries its width and height velocities separately rather than a single collapsed scalar. velocity is a caller-owned AnimationVector shaped by the animation's TypeConverter.newVector; the animator writes every component.
Parameters
playTimeNanos
Elapsed time since the animation started, in nanoseconds.
velocity
Output vector receiving one float-space velocity per component.