Unity---2d射线检测

Posted 2023-03-05 格拉格拉

目录

1.目标物体加对应的collider碰撞体

 2.调节ProjectSetting里的time 帧速

3.避坑代码

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1.目标物体加对应的collider碰撞体

 2.调节ProjectSetting里的time 帧速

3.避坑代码

using UnityEngine;

public class XXXContr : MonoBehaviour

    RaycastHit2D hit;
    private Transform hitObj;
   

    private void Awake()
    
        
    


    void Start()
    

    

    private void OnMouseDown()
    
        Debug.LogError("down");

    
    private void OnMouseDrag()
    
        
    
    private void OnMouseUp()
    
        SetTableState(false);
    

    private void FixedUpdate()
    
        if (isMove)
        
            //2d射线检测需要指定layer 并且添加射线长度，否则会失效
            LayerMask layer = 1 << 8;
            hit = Physics2D.Raycast(_camera.ScreenToWorldPoint(Input.mousePosition), Vector2.zero, 100f, layer);
            Debug.DrawLine(Input.mousePosition, hit.point, Color.black);
            if (hit.collider != null)
            
                hitObj = hit.transform;
                //Debug.LogError("------" + hitObj.tag + "------");
            
        
    

  

    private void OnTriggerEnter2D(Collider2D collision)
    
        //Debug.LogError("trigger:" + collision.tag);
    

    private void OnTriggerExit2D(Collider2D collision)
    
        //Debug.LogError("Exit:" + collision.tag);