Question

JavaScript => static function ClampMagnitude(vector: Vector3, maxLength: float): Vector3;
C# => static Vector3 ClampMagnitude(Vector3 vector, float maxLength);

Description 描述

Returns a copy of vector with its magnitude clamped to maxLength.

返回原向量的拷贝，并且它的模最大不超过maxLength所指示的长度。

也就是说，限制向量长度到一个特定的长度。

JavaScript:

	// 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);
	}

C#:

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);
    }
}

Vector3