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