Travel

Namespace holding mutable, globally-overridable defaults for the agent-layer travel primitives (travelTo, travelThrough).

Set values on Travel.Defaults once at model setup if you want every subsequent call without an explicit stepSize = argument to pick up a different value:

Travel.Defaults.stepSize = 0.25     // global override
travelTo(agent, space, dest, velocity = 2.0)    // uses 0.25
travelTo(agent, space, dest, velocity = 2.0, stepSize = 0.5)  // per-call override

Per-call overrides always win; the companion holds the fallback.