UNLIMITED_PITCH

constexpr Scalar UNLIMITED_PITCH = Scalar(1.57079632679489661923)

Description

The angle at which a pitch limit stops excluding anything, radians.

Pitch is the angle between forward and the horizontal plane of the yaw axis, so it cannot exceed a quarter turn by construction. A limit set at the pole therefore forbids no attitude the camera can actually hold, and apply_look_delta drops the clamp entirely at or above it rather than solving for a boundary nothing can cross.