射线
射线
1.射线检测
1.1检测单个物体
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
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
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
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); } } } }
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); } } } }
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
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
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); } }