如何使用设备指南针将对象或模型放置在统一的ARkit中？

Question

嗨，我想将模型放置在与北极相关的特定方向上。当我触摸屏幕后检测到平面后，将放置模型，但模型必须指向北极。我相信我们需要拿设备的陀螺仪并找到北极极点，然后放置模型。如果北极从我站立的地方成对角线，则放置模型时将保持对角线。因此，我必须增加或减少那么大的角度才能使模型笔直。从...开始。

Answer 1

I would set the alignment of the axes when you first configure your ARKit session so that they are aligned with gravity and heading. This is described here . So, after you do:

let configuration = ARWorldTrackingConfiguration()
configuration.worldAlignment = ARWorldTrackingConfiguration.WorldAlignment.gravityAndHeading
scnView.session.run(configuration)

It'll line up the axes with Magnetic North (note, this is slightly different from true north pole) . Now, if you place a model at (0,0,-1) , it'll show up 1 meter in the direction of Magnetic North