Function mirrorEventValues

mirrorEventValues(events: (Event | SpeedEvent)[], center?: number): void
Mirror event values around a center value (mutates in place).

For moveX events, use center = 0 to flip horizontal motion. For moveY / rotation events, also use center = 0.
Parameters
- events: (Event | SpeedEvent)[]
  Array of numeric events to mirror.
- center: number = 0
  The pivot value to mirror around (default 0).
Returns void
Example
```
// Flip all horizontal movement
mirrorEventValues(layer.moveXEvents ?? []);

// Mirror rotation around 45°
mirrorEventValues(layer.rotateEvents ?? [], 45);
```
- Defined in events.ts:874