Stefano Bonicatti 95056ca913 Fix skybox generation imprecision with Clang ...

The bug generated a "blue circle" at the bottom end of the y axis,
and probably one too at the other end.
This is caused by a normalization of a vector which results in its y component
to be sometimes > 1.0 or < -1.0 in Clang.
This value is then used with acos(), which returns NaN.

Fixes #11247

2017-12-10 19:56:45 +01:00

17 KiB

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