Interface FirstPersonNavOptions

Keep the eye pinned at heightM above the surface (true, the default) or let it HOLD ITS ALTITUDE while moving — free flight, the eye flies level over rising ground. Walk mode always clamps (you cannot walk off the surface); this is the fly-mode lock. See FirstPersonNavController.setClampToSurface.

Walk mode: the surface rise (m) the eye will still step/ramp over, measured across the look-ahead probe. Default 1.5.

NOTE it is a rise over the SPEED-SCALED probe distance (max(2, speedMps × lookAheadS)), so the slope it actually permits is atan(climbMaxM / probe) — 1.5 m reads as ≈37° at 2 m/s but only ≈14° at the default 8 m/s. FirstPersonNavController.getClimbSlopeDeg returns that live number (the widget shows it beside the slider).

Ease-in duration when entering first person, ms. Default 900.

Eye height above the surface, metres. Clamped to ≥ MIN_NAV_HEIGHT_M (2 ft); no maximum. Default 1.8 (eye level).

Walk mode: how far ahead the obstacle probe looks, seconds of travel (min 2 m). Default 0.75.

Look sensitivity, degrees of bearing per dragged pixel. Default 0.25.

Raise the map's maxZoom to 25 while enabled so low heights are reachable (default true; 25 is maplibre's MAX_TILE_ZOOM — elevation queries go blind past it).

Obstacle behavior: 'fly' climbs over anything; 'walk' blocks at walls. Default 'fly'.

Scroll wheel adjusts the eye height while enabled (default true).

Movement speed, metres/second. Default 8.