从相机视图拖动锁定在特定距离/半径处的对象 [英] Drag object locked at certain distance/radius from camera view

问题描述

我在场景的中心有一个相机，距离相机 z=400 的 1 个球体，它的父级在中心.

I have a camera in the center of the scene, 1 sphere at z=400 distance from the camera, with it's parent in the center.

我想从视图中向上/向下/向左/向右拖动球体，但同时不改变它的 z - 从中​​心的位置.

I want to drag the sphere up/down/left/right from the view but at the same time not change it's z - position from the center.

推荐答案

我最终使用了另一个球体并使其不可见，将 side: THREE.DoubleSide 添加到材质并将其用于光线投射.

I ended up using another sphere and make it invisible, add side: THREE.DoubleSide to the material and use it for raycasting.

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