在Arcore（sceneform）中不使用平面检测在指定点上渲染3d对象

Question

我正在开发一个增强现实应用程序，我必须在 ar 屏幕的指定点上放置一个 3d 对象（例如 - 手头放置一个对象）。 可以在不使用 Ar 场景形式的平面检测器的情况下做到这一点，因为我不想把它放在那个地方，而是在屏幕上的指定点。如果有人有答案，请给我一个来源

Answer 1

You can place an object at a point on the screen rather than on a plane - there are several approaches. One is to set an anchor relative to the camera position.

See this answer: https://stackoverflow.com/a/53175458/334402 and full code is available here if you want to play with it: https://github.com/mickod/LineView

Note, that this will put it at that point in the 'world' absolutely - ie not relative to a person's hand. So if the person moves their hand the renderable will remain in the place you put it, not move with their hand.