unity3d canvas坐标系转换

在Unity3D中，可以使用RectTransformUtility类中的ScreenPointToLocalPointInRectangle方法来进行坐标系的转换。具体的代码实现如下所示：

Camera camera = GameObject.Find("Main Camera").GetComponent<Camera>();
RectTransform canvas = GameObject.Find("Canvas").GetComponent<RectTransform>();

// 获取世界坐标在Canvas中的相对坐标
Vector2 localPos = Vector3.zero;
RectTransformUtility.ScreenPointToLocalPointInRectangle(canvas, camera.WorldToScreenPoint(transform.position), camera, out localPos);
Debug.Log(localPos);

// 遍历子物体，获取子物体在Canvas中的相对坐标
foreach (Transform trans in transform) {
    RectTransformUtility.ScreenPointToLocalPointInRectangle(canvas, camera.WorldToScreenPoint(trans.position), camera, out localPos);
    Debug.Log(localPos);
}

上述代码可以将世界坐标转换为指定Canvas的相对坐标。其中，`camera`表示主相机，`canvas`表示目标Canvas，`transform`表示需要转换的物体的Transform组件。通过调用`RectTransformUtility.ScreenPointToLocalPointInRectangle`方法，将世界坐标转换为Canvas中的相对坐标，并将结果存储在`localPos`变量中。

请注意，以上代码只是示例，您需要根据自己的具体场景进行相应的调整和修改。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *2* [Unity各种坐标转换](https://blog.csdn.net/qq_30058057/article/details/105413689)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
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