#unity/日常积累

# [Camera](https://docs.unity.cn/cn/current/ScriptReference/Camera.html).WorldToScreenPoint

public [Vector3](https://docs.unity.cn/cn/current/ScriptReference/Vector3.html) WorldToScreenPoint ([Vector3](https://docs.unity.cn/cn/current/ScriptReference/Vector3.html) position);

public [Vector3](https://docs.unity.cn/cn/current/ScriptReference/Vector3.html) WorldToScreenPoint ([Vector3](https://docs.unity.cn/cn/current/ScriptReference/Vector3.html) position, [Camera.MonoOrStereoscopicEye](https://docs.unity.cn/cn/current/ScriptReference/Camera.MonoOrStereoscopicEye.html) eye);

## 参数

eye

可选参数，可用于指定要使用的眼睛变换。默认值为 Mono。

## 描述

将 `position` 从世界空间变换为屏幕空间。

屏幕空间以像素定义。屏幕的左下角为 (0,0)，右上角 为 ([pixelWidth](https://docs.unity.cn/cn/current/ScriptReference/Camera-pixelWidth.html),[pixelHeight](https://docs.unity.cn/cn/current/ScriptReference/Camera-pixelHeight.html))。z 位置为与摄像机的距离，采用世界单位。

``` cs
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public Transform target;
    Camera cam;

    void Start()
    {
        cam = GetComponent<Camera>();
    }

    void Update()
    {
        Vector3 screenPos = cam.WorldToScreenPoint(target.position);
        Debug.Log("target is " + screenPos.x + " pixels from the left");
    }
}
```