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# Vector3.ClampMagnitude

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マニュアルに切り替える
public static function ClampMagnitude(vector: Vector3, maxLength: float): Vector3;
public static Vector3 ClampMagnitude(Vector3 vector, float maxLength);

## Description

```	// Move the object around with the arrow keys but confine it
// to a given radius around a center point.
var centerPt: Vector3;
var radius: float;

function Update() {
// Get the new position for the object.
var movement = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
var newPos = transform.position + movement;

// Calculate the distance of the new position from the center point. Keep the direction
// the same but clamp the length to the specified radius.
var offset = newPos - centerPt;
transform.position = centerPt + Vector3.ClampMagnitude(offset, radius);
}```
```using UnityEngine;
using System.Collections;public class ExampleClass : MonoBehaviour {
public Vector3 centerPt;
public float radius;
void Update() {
Vector3 movement = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
Vector3 newPos = transform.position + movement;
Vector3 offset = newPos - centerPt;
transform.position = centerPt + Vector3.ClampMagnitude(offset, radius);
}
}
```