Physics.SphereCast 球体投射

static function SphereCast (origin : Vector3, radius : float, direction : Vector3, out hitInfo : RaycastHit, distance : float = Mathf.Infinity, layerMask : int = kDefaultRaycastLayers) : boolean

Parameters参数

origin

The center of the sphere at the start of the sweep.
在扫描起点的球体中心点。
radius

The radius of the sphere.
球体的半径。
direction

The direction into which to sweep the sphere.
球体扫描的方向
hitInfo

If true is returned, hitInfo will contain more information about where the collider was hit (See Also: RaycastHit).
如果返回true，hitInfo将包含碰到器碰撞的更多信息。
distance

The length of the sweep
扫描的长度
layerMask

A Layer mask that is used to selectively ignore colliders when casting a capsule.
根据Layer mask层的不同来忽略碰撞体。

Returns

boolean - True when the capsule sweep intersects any collider, otherwise false.

当胶囊物体投射时与碰撞体相交时，返回真，否则返回假。

Description描述

Casts a sphere against all colliders in the scene and returns detailed information on what was hit.

投射球型物体来判断是否与场景中物体交互，返回 Raycasthit 信息。

This is useful when a Raycast does not give enough precision, because you want to find out if an object of a specific size, such as a character, will be able to move somewhere without colliding with anything on the way. Think of the sphere cast like a thick raycast.

这可以用在光线投射无法满足要求时的情况下。例如要判断角色（有空间大小尺寸）是否和一个物体发生碰撞。

参见： Physics.SphereCastAll, Physics.CapsuleCast, Physics.Raycast, Rigidbody.SweepTest

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	void Update() {
		RaycastHit hit;
		CharacterController charCtrl = GetComponent<CharacterController>();
		Vector3 p1 = transform.position + charCtrl.center;
		if (Physics.SphereCast(p1, charCtrl.height / 2, transform.forward, out hit, 10))
			distanceToObstacle = hit.distance;
		
	}
}

function Update () {
	var hit : RaycastHit;
	var charCtrl : CharacterController = GetComponent(CharacterController);
	var p1 : Vector3 = transform.position + charCtrl.center;
	// Cast a sphere wrapping character controller 10 meters forward, to see if it is about to hit anything
	//向前投射一个球体角色控制器10米，看它如何碰到东西
	if (Physics.SphereCast (p1, charCtrl.height / 2, transform.forward, hit, 10)) {
		distanceToObstacle = hit.distance;
	}
}

• static function SphereCast (ray : Ray, radius : float, distance : float = Mathf.Infinity, layerMask : int = kDefaultRaycastLayers) : boolean
• static function SphereCast (ray : Ray, radius : float, out hitInfo : RaycastHit, distance : float = Mathf.Infinity, layerMask : int = kDefaultRaycastLayers) : boolean