The value in a bitmask for {@link #intersectAab(double, double, double, double, double, double, int) intersectAab()} that identifies the plane with equation <code>x=1</code> when using the identity frustum.
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The value in a bitmask for {@link #intersectAab(double, double, double, double, double, double, int) intersectAab()} that identifies the plane with equation <code>x=1</code> when using the identity frustum.