Unity 射线检测(2D&&3D)

被点击的物体上必须有collider组件
3D物体检测：

//鼠标右键点击
if (Input.GetMouseButtonUp(1))
        {
            // 点击鼠标左键抬起时发射一条射线
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            RaycastHit hitInfo;
            if (Physics.Raycast(ray, out hitInfo))
            {
                Debug.Log("click object name is ---->" + hitInfo.collider.gameObject.name);
            }

            //在半径为5的球形范围内的所有3d物体都会被检测到
            Collider[] colliders = Physics.OverlapSphere(Vector3.zero, 5.0f);
            if (colliders.Length > 0)
            {
                for (int i = 0; i < colliders.Length; i++)
                {
                    Debug.Log("第二种方式---click object name is ---->" + colliders[i].gameObject.name);
                }
            }
        }

2D物体检测

//左
if (Input.GetMouseButtonUp(0))
        {
            // 第一种方法，与3d检测类似
            RaycastHit2D hit = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);
            if (hit.collider != null)
            {
                Debug.Log("clicked object name is ---->"+ hit.collider.gameObject);
            }

            // 第二种方法，overlap检测物体重叠的点
            Collider2D[] collider2Ds = Physics2D.OverlapPointAll(Camera.main.ScreenToWorldPoint(Input.mousePosition));
            if (collider2Ds.Length > 0)
            {
                for (int i = 0; i < collider2Ds.Length; i++)
                {
                    Debug.Log("overlap object point,The name is ---->" + collider2Ds[i].gameObject.name);
                }

                //foreach (Collider2D item in collider2Ds)
                //{
                //    Debug.Log("overlap object point,The name is ---->" + collider2Ds[i].gameObject.name);
                //}
            }
        }

demo链接