Function smoothDampVector3

smoothDampVector3(
    current: Vector3,
    target: Vector3,
    velocity: Vector3,
    smoothTime: number,
    deltaTime: number,
    maxSpeed?: number,
    out?: Vector3,
): Vector3
Unity-style smooth damping for Vector3 positions.

Provides organic, spring-like camera movement toward a target position. Each axis is independently damped for smooth 3D motion without overshooting.
Parameters
- current: Vector3
  Current position
- target: Vector3
  Target position
- velocity: Vector3
  Velocity vector (mutated per-axis)
- smoothTime: number
  Approximate time to reach target (seconds)
- deltaTime: number
  Time elapsed since last frame (seconds)
- maxSpeed: number = Infinity
  Optional maximum speed limit per axis
- Optionalout: Vector3
  Optional output vector (avoids allocation)
Returns Vector3
New smoothed position
Example
```
const velocity = new THREE.Vector3();
const smoothPos = smoothDampVector3(
  camera.position,
  targetPosition,
  velocity,
  0.3,
  deltaTime
);
camera.position.copy(smoothPos);
```
- Defined in src/core/camera.ts:232