在面部地标检测后，在iOS中渲染3D模型的最佳方法是什么？(What is the best approach to render 3D model in iOS after facial landm

在面部地标检测后，在iOS中渲染3D模型的最佳方法是什么？(What is the best approach to render 3D model in iOS after facial landmark detection?)

我想在面部地标检测后放置一个发型。 我能够正确渲染2D图像。 我想渲染3D模型。 我想过使用Scenekit来渲染3D模型。 我想知道Instagram，Snapchat和其他面部滤镜应用程序是如何渲染3D模型的。 我观察SceneKit坐标系与UIKit坐标系不同。 我用谷歌搜索但找不到坐标系的转换。 有谁可以帮忙。 谢谢。

I would like to place a hairstyle after facial landmark detection. I'm able to render 2D images properly. I would like to render 3D model. I thought of using SceneKit to render 3D model. I would like to know how Instagram, snapchat and other face filter apps are rendering 3D models. I observe SceneKit coordinate system is different from UIKit coordinate system. I have googled but couldn't find the conversion of coordinate system. Could anyone help. Thanks.

最满意答案

查找worldUp和simdWorldUp实例属性，了解ARKit如何基于真实设备运动构建场景坐标系（同样，您可以检查ARConfiguration.WorldAlignment枚举）。

请看这篇SO帖子： 了解ARKit中的坐标空间以获取完整信息。

请记住， ARAnchor是您放置3D物体时最好的朋友。 点击此处了解更多详情。

Look for worldUp and simdWorldUp instance properties to understand how ARKit constructs a scene coordinate system based on real-world device motion (also, you can inspect ARConfiguration.WorldAlignment enum).

Please, look at this SO post: Understand coordinate spaces in ARKit for complete info.

And remember, ARAnchor is your best friend when placing 3D object. Click here for further details.