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我在画布上有一个管子轨迹(使用three.js)。我在相机中添加了轨迹球控件,以便可以旋转和缩放轨迹-/+。
现在我想显示一个指南针,显示轨迹在 LHS 最底角的方向——它应该随着轨迹的移动而移动。
谢谢,布彭德拉