public override IEnumerable <Status> Run()
{
PerchTime.Reset();
WanderTime.Reset();
TurnTime.Reset();
while (true)
{
if (State == FlyState.Perching)
{
PerchTime.Reset();
while (!PerchTime.HasTriggered)
{
Agent.Creature.Physics.Velocity = Vector3.Zero;
Agent.Creature.CurrentCharacterMode = Creature.CharacterMode.Idle;
PerchTime.Update(DwarfTime.LastTime);
yield return(Act.Status.Running);
}
// When we're done flying, go back to walking and just fall.
Agent.Creature.CurrentCharacterMode = Creature.CharacterMode.Walking;
Agent.Creature.Physics.Gravity = OriginalGravity;
yield return(Act.Status.Success);
}
Agent.Creature.Physics.Gravity = Vector3.Zero;
// Store the last position of the bird to sample from
Vector3 oldPosition = Agent.Position;
// Get the height of the terrain beneath the bird.
float surfaceHeight = Agent.Chunks.ChunkData.GetFilledVoxelGridHeightAt(oldPosition.X, oldPosition.Y,
oldPosition.Z);
// Immediately start flying.
Agent.Creature.CurrentCharacterMode = Creature.CharacterMode.Flying;
// Use this to determine when to start turning.
float currentDistance = 999;
{
// Pick a target within a box floating some distance above the surface.
float randomX = MathFunctions.Rand() * Radius - Radius / 2.0f;
float randomZ = MathFunctions.Rand() * Radius - Radius / 2.0f;
float randomY = (float)PlayState.Random.NextDouble() * YRadius + Altitude + surfaceHeight;
// Set the target to that random location.
LocalTarget = new Vector3(randomX + oldPosition.X, randomY, randomZ + oldPosition.Z);
}
// Keep flying until a timer has trigerred.
while ((!WanderTime.HasTriggered && State == FlyState.Wandering) || (State == FlyState.SearchingForPerch))
{
// If we hit the ground, switch to walking, otherwise switch to flying.
Agent.Creature.CurrentCharacterMode = Creature.CharacterMode.Flying;
WanderTime.Update(DwarfTime.LastTime);
// If we're near a target, or a timeout occured, pick a new ranodm target.
if (TurnTime.Update(DwarfTime.LastTime) || TurnTime.HasTriggered || currentDistance < TurnThreshold)
{
// Pick a target within a box floating some distance above the surface.
float randomX = MathFunctions.Rand() * Radius - Radius / 2.0f;
float randomZ = MathFunctions.Rand() * Radius - Radius / 2.0f;
float randomY = (float)PlayState.Random.NextDouble() * YRadius + Altitude + surfaceHeight;
// Set the target to that random location.
LocalTarget = new Vector3(randomX + oldPosition.X, randomY, randomZ + oldPosition.Z);
}
// Set the current distance to the target so we know when to go to a new target.
currentDistance = (Agent.Position - LocalTarget).Length();
// Output from the force controller.
Vector3 output =
Creature.Controller.GetOutput((float)DwarfTime.LastTime.ElapsedGameTime.TotalSeconds,
LocalTarget, Creature.Physics.GlobalTransform.Translation);
// We apply a linear combination of the force controller and the
// feed forward force to the bird to make it lazily turn around and fly.
Creature.Physics.ApplyForce(output * Damping * GravityCompensation,
(float)DwarfTime.LastTime.ElapsedGameTime.TotalSeconds);
if (State == FlyState.Wandering && WanderTime.HasTriggered)
{
State = FlyState.SearchingForPerch;
}
if (State == FlyState.SearchingForPerch)
{
Voxel vox = Creature.Physics.CurrentVoxel;
if (vox.WaterLevel > 0)
{
yield return(Act.Status.Running);
continue;
}
if (CanPerchOnGround)
{
Creature.Physics.ApplyForce(OriginalGravity, (float)DwarfTime.LastTime.ElapsedGameTime.TotalSeconds);
Voxel below = vox.GetVoxelBelow();
if (below != null && !below.IsEmpty && below.WaterLevel == 0)
{
State = FlyState.Perching;
continue;
}
}
if (CanPerchOnWalls)
{
foreach (Voxel n in Creature.Physics.Neighbors)
{
if (n != null && n.GridPosition.Y >= vox.GridPosition.Y && !n.IsEmpty)
{
State = FlyState.Perching;
continue;
}
}
}
/*
* if (CanPerchOnObjects)
* {
* List<Body> objetcs = new List<Body>();
* PlayState.ComponentManager.GetBodiesIntersecting(Creature.Physics.BoundingBox, objetcs, CollisionManager.CollisionType.Static);
*
* if (objetcs.Count > 0)
* {
* State = FlyState.Perching;
* continue;
* }
* }
*/
}
yield return(Status.Running);
}
yield return(Status.Running);
}
}
