Physics.RaycastAll 所有光线投射

# [Physics](Physics.html).RaycastAll 所有光线投射

static function *RaycastAll* (*ray* : [Ray](../Ray/Ray.html), *distance* : float = [Mathf.Infinity](../Mathf/Mathf.Infinity.html), layerMask : int =
kDefaultRaycastLayers) : [RaycastHit](../RaycastHit/RaycastHit.html)[]
static function
*RaycastAll* (*origin* : [Vector3](../Vector3/Vector3.html), direction : [Vector3](../Vector3/Vector3.html), distance : float = [Mathf.Infinity](../Mathf/Mathf.Infinity.html), layermask : int =
kDefaultRaycastLayers) : [RaycastHit](../RaycastHit/RaycastHit.html)[]

*Description* 描述

Casts a ray through the scene and returns all hits.

投射一条光线并返回所有碰撞，也就是投射光线并返回一个 [RaycastHit](../RaycastHit/RaycastHit.html)[]结构体。

* [C#](#)
* [JavaScript](#)

```
using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	void Update() {
		RaycastHit[] hits;
		hits = Physics.RaycastAll(transform.position, transform.forward, 100.0F);
		int i = 0;
		while (i < hits.Length) {
			RaycastHit hit = hits[i];
			System.Object renderer = hit.collider.renderer;
			if (renderer) {
				renderer.material.shader = Shader.Find("Transparent/Diffuse");
				renderer.material.color.a = 0.3F;
			}
			i++;
		}
	}
}
```

```
function Update () {
	var hits : RaycastHit[];
	hits = Physics.RaycastAll (transform.position, transform.forward, 100.0);

// Change the material of all hit colliders 
	// to use a transparent Shader
	//改变所有碰到碰撞器的材质，使用透明的着色器
	for (var i = 0;i < hits.Length; i++) {
		var hit : RaycastHit = hits[i];
		var renderer = hit.collider.renderer;
		if (renderer) {
			renderer.material.shader = Shader.Find("Transparent/Diffuse");
			renderer.material.color.a = 0.3;
		}
	}
}
```

Note: This function will return false if you cast a ray from inside a sphere
to the outside; this in an intended behaviour.

注意：如果从一个球型体的内部到外部用光线投射，返回错误。