Above 1,000 km Cesium's wheel zoom turns the globe from the point under the
screen centre towards the point under the pointer. With the pointer on the
centre pixel the two are the same point; the dot product of its unit normal
with itself often rounds to just under 1, so Cesium rotates about their cross
product, which is the zero vector. Camera.rotate throws "normalized result is
not a number" from Scene.initializeFrame and the render loop stops until the
page is reloaded.
Guard camera.rotate against an axis it cannot normalize, and restart the
render loop from the last drawn pose when any error stops it, up to three
times in ten seconds.
Co-Authored-By: Claude Fable 5.2 <[email protected]>
