Strict walkability ray: true when the straight segment from start to end is NOT provably
clear on the navmesh. Unlike raycast (BJS Addons parity: hit only for 0 < t < 1),
an unresolvable start polygon and a wall at the very origin (Detour reports t = 0, which
happens whenever the probe origin lies on a boundary edge - e.g. a funnel corner) are BLOCKED:
"cannot prove clear" is blocked. Recast's raycast ignores the y component (2D check).
Strict walkability ray:
truewhen the straight segment fromstarttoendis NOT provably clear on the navmesh. Unlike raycast (BJS Addons parity:hitonly for0 < t < 1), an unresolvable start polygon and a wall at the very origin (Detour reportst = 0, which happens whenever the probe origin lies on a boundary edge - e.g. a funnel corner) are BLOCKED: "cannot prove clear" is blocked. Recast's raycast ignores the y component (2D check).