Input.mousePosition

# [Input](https://docs.unity3d.com/cn/2019.4/ScriptReference/Input.html).mousePosition

public static [Vector3](https://docs.unity3d.com/cn/2019.4/ScriptReference/Vector3.html) **mousePosition** ;

## 描述

鼠标当前的像素坐标位置。（只读）

屏幕或窗口的左下角坐标为 (0, 0)。 屏幕或窗口的右上角坐标为 ([Screen.width](https://docs.unity3d.com/cn/2019.4/ScriptReference/Screen-width.html), [Screen.height](https://docs.unity3d.com/cn/2019.4/ScriptReference/Screen-height.html))。

注意：即使鼠标不在游戏视图中（例如 [Cursor.lockState](https://docs.unity3d.com/cn/2019.4/ScriptReference/Cursor-lockState.html) 设置为 [CursorLockMode.None](https://docs.unity3d.com/cn/2019.4/ScriptReference/CursorLockMode.None.html) 时），[Input.mousePosition](https://docs.unity3d.com/cn/2019.4/ScriptReference/Input-mousePosition.html) 也报告鼠标的位置。以窗口模式运行并且不限制光标移动范围时，如果位置值小于 0 或大于屏幕尺寸 ([Screen.width](https://docs.unity3d.com/cn/2019.4/ScriptReference/Screen-width.html),[Screen.height](https://docs.unity3d.com/cn/2019.4/ScriptReference/Screen-height.html))，则说明鼠标光标位于游戏窗口以外。

```
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public GameObject particle;
    void Update()
    {
        if (Input.GetButtonDown("Fire1"))
        {
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            if (Physics.Raycast(ray))
                Instantiate(particle, transform.position, transform.rotation);
        }
    }
}
```