Computes the effective maximum pitch for a given camera radius. When
pitchDisabledRadiusScale is set, pitch is interpolated from pitchMax down
to pitchMin as the camera zooms out from x·planetRadius to y·planetRadius
(so a fully zoomed-out camera looks straight down).
Computes the effective maximum pitch for a given camera radius. When
pitchDisabledRadiusScaleis set, pitch is interpolated frompitchMaxdown topitchMinas the camera zooms out fromx·planetRadiustoy·planetRadius(so a fully zoomed-out camera looks straight down).