public static IEnumerator <BTStatus> FoodFinder(Animal agent, Func <Animal, BTStatus> noNearbyFoodBehavior, float hungerRestored)
{
var lastPos = Vector3.Zero;
Queue <Vector3> foodSources = new Queue <Vector3>();
while (agent.Hunger > Brain.HungerSatiated)
{
foodSources.Clear();
while (foodSources.Count == 0)
{
if (Vector3.WrappedDistanceSq(lastPos, agent.Position) > 100)
{
var agentRegion = RouteRegions.GetRegion(agent.Position.WorldPosition3i);
foodSources.AddRange(EcoSim.PlantSim.PlantsWithinRange(agent.Position, 10, plant => agent.Species.Eats(plant.Species) &&
RouteRegions.GetRegion(plant.Position.WorldPosition3i.Down()) == agentRegion).Shuffle().Select(plant => plant.Position + Vector3.Down));
lastPos = agent.Position;
}
else
{
yield return(noNearbyFoodBehavior(agent));
}
}
while (foodSources.Count > 0 && agent.Hunger > Brain.HungerSatiated && Vector3.WrappedDistanceSq(lastPos, agent.Position) < 100)
{
// low-effort search for the first option or any other option visited while trying to hit the first
Vector3 targetPlantPosition;
PiecewiseLinearFunction route = AIUtilities.GetRouteToAny(agent.Position, foodSources, agent.Species.WanderingSpeed, out targetPlantPosition, 100, 20, agent.Species.HeadDistance);
if (route == null)
{
break;
}
agent.Target.SetPath(route);
agent.Target.LookPos = targetPlantPosition;
agent.AnimationState = AnimalAnimationState.LookingForFood;
var target = route.EndPosition;
// just in case something interrupts the path
while (agent.Target.TargetTime > WorldTime.Seconds && agent.Target.TargetPosition == target)
{
agent.NextTick = agent.Target.TargetTime;
yield return(BTStatus.Running);
}
if (Vector3.WrappedDistanceSq(target, agent.Position) < 4)
{
agent.AnimationState = AnimalAnimationState.Eating;
agent.NextTick = WorldTime.Seconds + 10;
agent.Hunger -= hungerRestored;
agent.Target.LookPos = targetPlantPosition;
yield return(BTStatus.Running);
}
// something interrupted eating, probably need to find new food
if (agent.Target.TargetPosition != target)
{
break;
}
}
}
}
