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  "contentMarkdown": "# WorldToScreenPoint获取到的屏幕坐标异常\n\n> [!note] 我的 UWA 问答\n> 本文收录我在 UWA 问答发表的公开回答。问题内容归原提问者；回答保留当时语境，技术结论可能受 Unity 版本、平台和项目条件限制。\n\n## 问题\n\n![1.gif](assets/60acab5d6bb31032f979189d/01.gif)\n\n![20181220230428406.png](assets/60acab5d6bb31032f979189d/02.png)\n\n用Camera.WorldToScreenPoint做屏幕映射的时候发现一个问题，当摄像机有旋转的时候，当摄像机移动到特殊位置时，返回值vector3.z值会从正变为负，而且x或y值也会发生正负突变\n\n请教各位大神，这个该如何解决？\n\n- 提问者：路人甲\n- 提问时间：2021-05-25 23:46:37\n\n## 我的回答\n\n给个解决方案哈：\n\n![image.png](assets/60acab5d6bb31032f979189d/03.png)\n\n原理要自己慢慢悟了，不是BUG：相机的z轴方向上，物体在相机后面时，物体的坐标转换到裁剪空间后，x、y方向上，下面的会跑到上面，上面的会跑到下面。 想一下小孔成像的原理，或许能帮助理解。\n\n- 回答时间：2021-05-26 21:25:22\n- 最后更新：2021-05-28 08:45:03\n- 采纳状态：已采纳\n\n## 来源与关系\n\n- 上位集合：[[10-计算机、信息技术与工程/05-游戏图形与运行时/我的UWA问答/我的UWA问答|我的 UWA 问答]]\n- UWA 标签：终端平台、GPU\n- 原始问题：[WorldToScreenPoint获取到的屏幕坐标异常](https://answer.uwa4d.com/question/60acab5d6bb31032f979189d)\n- 源页最后更新：2022-10-19 04:24:05\n"
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