GUI坐标转换

    public Vector3 pos;
    public GameObject cube;

    private void OnGUI()
    {
        GUILayout.Label("鼠标点击位置信息" + Input.mousePosition);
        GUILayout.Label("鼠标点击的位置" + pos);
    }
    public Vector3 ScreenToWorld(Vector3 mousePos, Transform targetT)
    {
        Vector3 dis = targetT.position - Camera.main.transform.position;//获取相机与物体之间的差值
        Vector3 nomalDir = Vector3.Project(dis, Camera.main.transform.forward);//通过差值,可以获取与相机正前方的投影面（矩形框）
        Vector3 pos = Camera.main.ScreenToWorldPoint(new Vector3(mousePos.x, mousePos.y, nomalDir.magnitude));//获取相机的长度
        return pos;//返回一个位置
    }
    private void Update()
    {
        pos = ScreenToWorld(Input.mousePosition, cube.transform);
        if (Input.GetMouseButtonDown(0))
        {
            cube.transform.position = pos;
            if (Input.GetMouseButton(0))
            {
                cube.transform.position = pos;
            }
        }
    }

2020-7-7 15-21-33.JPG

    public GameObject parent;
    public GameObject sun;

    private void OnGUI()
    {
        
        GUI.Label(new Rect(40, 40, 200, 20), "方块的世界坐标" + parent.transform.position);
        GUI.Label(new Rect(40, 60, 200, 20), "圆球的世界坐标" + sun.transform.position);
        GUI.Label(new Rect(40, 80, 200, 20), "方块的自身坐标" + parent.transform.localPosition);
        GUI.Label(new Rect(40, 100, 200, 20), "圆球的自身坐标" + sun.transform.localPosition);
      if (GUILayout.Button("转换"))
      {
        Debug.Log("圆球的世界坐标是：" + parent.transform.TransformPoint(sun.transform.localPosition));
        Debug.Log("圆球的自身坐标是：" + parent.transform.InverseTransformPoint(sun.transform.position));
      }
    }