Unity Script Reference – Physics.SphereCast

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

Parameters

Name	Description
origin	The center of the sphere at the start of the sweep.
radius	The radius of the sphere.
direction	The direction into which to sweep the sphere.
hitInfo	If true is returned, hitInfo will contain more information about where the collider was hit (See Also: RaycastHit).
distance	The length of the sweep
layerMask	A Layer mask that is used to selectively ignore colliders when casting a capsule.

Returns

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

Description

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

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.

JavaScripts

function Update () {
var hit : RaycastHit;
var charCtrl : CharacterController = GetComponent(CharacterController);
var p1 : Vector3 = transform.position + charCtrl.center +
Vector3.up * (-charCtrl.height*0.5);
var p2 : Vector3 = p1 + Vector3.up * charCtrl.height;
// Cast character controller shape 10 meters forward, to see if it is about to hit anything
if (Physics.CapsuleCast (p1, p2, charCtrl.radius, transform.forward, hit, 10)) {
distanceToObstacle = hit.distance;
}
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
void Update() {
RaycastHit hit;
CharacterController charCtrl = GetComponent<CharacterController>();
Vector3 p1 = transform.position + charCtrl.center + Vector3.up * -charCtrl.height * 0.5F;
Vector3 p2 = p1 + Vector3.up * charCtrl.height;
if (Physics.CapsuleCast(p1, p2, charCtrl.radius, transform.forward, out hit, 10))
distanceToObstacle = hit.distance;

}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

def Update():
hit as RaycastHit
charCtrl as CharacterController = GetComponent[of CharacterController]()
p1 as Vector3 = ((transform.position + charCtrl.center) + (Vector3.up * ((-charCtrl.height) * 0.5F)))
p2 as Vector3 = (p1 + (Vector3.up * charCtrl.height))
if Physics.CapsuleCast(p1, p2, charCtrl.radius, transform.forward, hit, 10):
distanceToObstacle = hit.distance

static function SphereCast (ray : Ray, radius : float, distance : float = Mathf.Infinity, layerMask : int = kDefaultRaycastLayers) : bool