Question

JavaScript => static function RotateTowards(current: Vector3, target: Vector3, maxRadiansDelta: float, maxMagnitudeDelta: float): Vector3;
C# => static Vector3 RotateTowards(Vector3 current, Vector3 target, float maxRadiansDelta, float maxMagnitudeDelta);

Description 描述

Rotates a vector current towards target.

当前的向量转向目标。

This function is similar to MoveTowards except that the vector is treated as a direction rather than a position. The current vector will be rotated round toward the target direction by an angle of maxRadiansDelta, although it will land exactly on the target rather than overshoot. If the magnitudes of current and target are different then the magnitude of the result will be linearly interpolated during the rotation. If a negative value is used for maxRadiansDelta, the vector will rotate away from target/ until it is pointing in exactly the opposite direction, then stop.

这个函数类似于MoveTowards除了将向量被视为一个方向，而不是一个位置上。当前向量将被旋转朝向目标方向由maxRadiansDelta的角度，虽然会恰好落在目标，而不是超过。如果当前的大小和目标的是不同的，那么结果的幅度将被线性地旋转过程中进行插值。如果一个负值用于maxRadiansDelta ，向量会转离目标/直到它指向完全相反的方向，然后停止。

JavaScript:

	// The target marker.
	var target: Transform;
 
	// Angular speed in radians per sec.
	var speed: float;
 
	function Update () {
		var targetDir = target.position - transform.position;
 
	    // The step size is equal to speed times frame time.
	    var step = speed * Time.deltaTime;
 
	    var newDir = Vector3.RotateTowards(transform.forward, targetDir, step, 0.0);
	    Debug.DrawRay(transform.position, newDir, Color.red);
	    // Move our position a step closer to the target.
	    transform.rotation = Quaternion.LookRotation(newDir);
	}

C#:

using UnityEngine;
using System.Collections;
 
public class ExampleClass : MonoBehaviour {
    public Transform target;
    public float speed;
    void Update() {
        Vector3 targetDir = target.position - transform.position;
        float step = speed * Time.deltaTime;
        Vector3 newDir = Vector3.RotateTowards(transform.forward, targetDir, step, 0.0F);
        Debug.DrawRay(transform.position, newDir, Color.red);
        transform.rotation = Quaternion.LookRotation(newDir);
    }
}

Vector3