Display mini-axes in corner #9
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A navigation-aid option we might want to add at some point is a set of mini-axes in the corner that show the current rotation of the view in world-coordinate terms.
As an example https://codepen.io/jerryasher/pen/qOKgeM
Or maybe we are trying to be as agnostic as possible to "world coordinates" and this is actually not a Good Thing? A bit unclear. To some ideal, we would be as coordinate-free as we can; but there is a practical difficulty that it's a bit cognitively hard to orient oneself looking at a blank canvas that is supposed to represent a 3D scene... We can try it without axes first, and see how bad this is; maybe once one has added a few points, things will naturally start to "orient themselves" in one's mind.