Raycast、BoxCast、SphereCastの確認用

BoxcastTest.cs

using UnityEngine;
using System.Collections;

public class BoxcastTest : MonoBehaviour 
{
	RaycastHit hit;

	[SerializeField]
	bool isEnable = false;

	void OnDrawGizmos()
	{
		if (isEnable == false)
			return;

		var scale = transform.lossyScale.x * 0.5f;

		var isHit = Physics.BoxCast (transform.position, Vector3.one * scale, transform.forward, out hit, transform.rotation);
		if (isHit) {
			Gizmos.DrawRay (transform.position, transform.forward * hit.distance);
			Gizmos.DrawWireCube (transform.position + transform.forward * hit.distance, Vector3.one * scale * 2);
		} else {
			Gizmos.DrawRay (transform.position, transform.forward * 100);
		}
	}
}

RaycastTest.cs

using UnityEngine;
using System.Collections;

public class RaycastTest : MonoBehaviour 
{
	RaycastHit hit;

	[SerializeField]
	bool isEnable = false;

	void OnDrawGizmos()
	{
		if (isEnable == false)
			return;

		var scale = transform.lossyScale.x * 0.5f;

		var isHit = Physics.Raycast (transform.position, transform.forward, out hit, 100);
		if (isHit) {
			Gizmos.DrawRay (transform.position, transform.forward * hit.distance);
		} else {
			Gizmos.DrawRay (transform.position, transform.forward * 100);
		}
	}
}

SpherCastTest.cs

using UnityEngine;
using System.Collections;

public class SpherCastTest : MonoBehaviour {

	RaycastHit hit;

	[SerializeField]
	bool isEnable = false;

	void OnDrawGizmos()
	{
		if (isEnable == false)
			return;

		var radius = transform.lossyScale.x * 0.5f;

		var isHit = Physics.SphereCast (transform.position, radius, transform.forward * 10, out hit);
		if (isHit) {
			Gizmos.DrawRay (transform.position, transform.forward * hit.distance);
			Gizmos.DrawWireSphere ( transform.position + transform.forward  *( hit.distance ) ,  radius );
		} else {
			Gizmos.DrawRay (transform.position, transform.forward * 100);
		}
	}
}