使用 Physics.Raycast 和 Physics2D.Raycast 检测对对象的点击

Question

我的场景中有一个空的游戏对象，带有一个组件盒对撞机 2D。

我将脚本附加到此游戏对象：

void OnMouseDown()
{
    Debug.Log("clic");
}

但是当我点击我的游戏对象时，没有任何效果。你有什么想法？我如何检测我的盒子对撞机上的点击？

Answer 1

使用光线投射。检查是否按下了鼠标左键。如果是这样，则从发生鼠标单击的位置向发生碰撞的位置投掷不可见射线。对于 3D 对象，使用：

3D模型：

void check3DObjectClicked ()
{
    if (Input.GetMouseButtonDown (0)) {
        Debug.Log ("Mouse is pressed down");
    
        RaycastHit hitInfo = new RaycastHit ();
        if (Physics.Raycast (Camera.main.ScreenPointToRay (Input.mousePosition), out hitInfo)) {
            Debug.Log ("Object Hit is " + hitInfo.collider.gameObject.name);

            //If you want it to only detect some certain game object it hits, you can do that here
            if (hitInfo.collider.gameObject.CompareTag ("Dog")) {
                Debug.Log ("Dog hit");
                //do something to dog here
            } else if (hitInfo.collider.gameObject.CompareTag ("Cat")) {
                Debug.Log ("Cat hit");
                //do something to cat here
            }
        } 
    } 
}

二维精灵：

上述解决方案适用于 3D。如果您希望它适用于 2D，请将 Physics.Raycast 替换为 Physics2D.Raycast。例如：

void check2DObjectClicked()
{
    if (Input.GetMouseButtonDown(0))
    {
        Debug.Log("Mouse is pressed down");
        Camera cam = Camera.main;

        //Raycast depends on camera projection mode
        Vector2 origin = Vector2.zero;
        Vector2 dir = Vector2.zero;

        if (cam.orthographic)
        {
            origin = Camera.main.ScreenToWorldPoint(Input.mousePosition);
        }
        else
        {
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            origin = ray.origin;
            dir = ray.direction;
        }

        RaycastHit2D hit = Physics2D.Raycast(origin, dir);

        //Check if we hit anything
        if (hit)
        {
            Debug.Log("We hit " + hit.collider.name);
        }
    }
}

使用 Physics.Raycast 和 Physics2D.Raycast 检测对对象的点击

Detect clicks on Object with Physics.Raycast and Physics2D.Raycast

c#

unity3d

mouseevent