射线

射线

1.射线检测

1.1检测单个物体

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

using UnityEngine;   public class Juse : MonoBehaviour {     public LayerMask layerMask;     private void Start()     {         layerMask = LayerMask.GetMask("ine");     }     private void Update()     {         //通过起始点和方向定义一条射线         Ray ray = new Ray(transform.position, transform.forward);         //射线碰撞信息         RaycastHit hit;         //打印射线第一个检测到的层级设置成“ine”的物体的名称，射线长度为100。         if (Physics.Raycast(ray,out hit,100f,layerMask))         {             Debug.Log("hitname:" + hit.transform.name);         }     } }

1.2检测多个物体

?

1 2 3 4 5 6 7 8 9 10 11 12 13

using UnityEngine;   public class Juse : MonoBehaviour {     private void Update()     {         RaycastHit[] hits = Physics.RaycastAll(transform.position, transform.forward, 100f);         for(int i = 0; i < hits.Length; i++)         {             Debug.Log("NO."+i+":"+ hits[i].collider.name);         }     } }

1.3球型检测

?

1 2 3 4 5 6 7 8 9 10 11 12 13

using UnityEngine;   public class Juse : MonoBehaviour {     private void Update()     {         Collider[] colliders = Physics.OverlapSphere(transform.position, 10f);         for (int i = 0; i < colliders.Length; i++)         {             Debug.Log("NO."+i+":"+ colliders[i].gameObject.name);         }     } }

1.4常用检测

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

using UnityEngine;   public class Juse : MonoBehaviour {     void Update()     {         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);         RaycastHit hit;         if (Input.GetMouseButton(0))         {             if (Physics.Raycast(ray, out hit, 100f, 1 << LayerMask.NameToLayer("Water")))//只检测层级名称为“Water”的物体             {                 Debug.Log("hit:" + hit.transform.name);             }         }     } }

　　

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

using UnityEngine;   public class Juse : MonoBehaviour {     void Update()     {         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);         RaycastHit hit;         if (Input.GetMouseButton(0))         {             if (Physics.Raycast(ray, out hit, 100f, 1 << 10))//只检测层级为10的物体             {                 Debug.Log("hit:" + hit.transform.name);             }         }     } }

　　

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

using UnityEngine;   public class Juse : MonoBehaviour {     private LayerMask layerMask;//也可设置成public,在面板中设定     void Start()     {         layerMask = 1 << 1; //表示允许检测第一层Layer。         layerMask += 1 << 2; //增加允许检测第二层Layer。         layerMask |= 1 << 3; //增加允许检测第三层Layer。         layerMask = ~layerMask;//取反     }     void Update()     {         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);         RaycastHit hit;         if (Input.GetMouseButton(0))         {             if (Physics.Raycast(ray, out hit, 100f, layerMask))//检测除1，2，3层级外所有层的物体             {                 Debug.Log("hit:" + hit.transform.name);             }         }     } }

　　

2.射线绘制

绘制射线一般用于调试，有两种方式

2.1方式一

?

1 2 3 4 5 6 7 8 9 10

using UnityEngine;   public class Juse : MonoBehaviour {     private void Start()     {         //两个点确定的射线。参数分别为：发射点位置，另一个点的位置，射线颜色，持续时间，能否被遮挡         Debug.DrawLine(transform.position, new Vector3(0, 0, 10), Color.green, 10f, true);     } }

2.2方式二

?

1 2 3 4 5 6 7 8 9 10

using UnityEngine;   public class Juse : MonoBehaviour {     private void Start()     {         //点和方向确定的射线。参数分别为：发射点位置，方向，射线颜色，持续时间，能否被遮挡         Debug.DrawRay(transform.position, new Vector3(0, 0, 10), Color.green, 10f, true);     } }