Class AILerp Extends VersionedMonoBehaviour, IAstarAI

void DrawGizmos ()

void FinalizeMovement (

Vector3	nextPosition
Quaternion	nextRotation

)

Move the agent.

To be called as the last step when you are handling movement manually.

The movement will be clamped to the navmesh if applicable (this is done for the RichAI movement script).

Vector3 GetFeetPosition ()

void GetRemainingPath (

List<Vector3>	buffer	The buffer will be cleared and replaced with the path. The first point is the current position of the agent.
out bool	stale	May be true if the path is invalid in some way. For example if the agent has no path or (for the RichAI script only) if the agent has detected that some nodes in the path have been destroyed.

)

Fills buffer with the remaining path.

var buffer = new List<Vector3>();

ai.GetRemainingPath(buffer, out bool stale);
for (int i = 0; i < buffer.Count - 1; i++) {
Debug.DrawLine(buffer[i], buffer[i+1], Color.red);
}


void MovementUpdate (

float	deltaTime	time to simulate movement for. Usually set to Time.deltaTime.
out Vector3	nextPosition	the position that the agent wants to move to during this frame.
out Quaternion	nextRotation	the rotation that the agent wants to rotate to during this frame.

)

Calculate how the character wants to move during this frame.

Note that this does not actually move the character. You need to call FinalizeMovement for that. This is called automatically unless canMove is false.

To handle movement yourself you can disable canMove and call this method manually. This code will replicate the normal behavior of the component: void Update () {
// Disable the AIs own movement code
ai.canMove = false;
Vector3 nextPosition;
Quaternion nextRotation;
// Calculate how the AI wants to move
ai.MovementUpdate(Time.deltaTime, out nextPosition, out nextRotation);
// Modify nextPosition and nextRotation in any way you wish
// Actually move the AI
ai.FinalizeMovement(nextPosition, nextRotation);
}


void OnDisable ()

void OnTargetReached ()

The end of the path has been reached.

If you want custom logic for when the AI has reached it's destination add it here. You can also create a new script which inherits from this one and override the function in that script.

void SearchPath ()

Requests a path to the target.

void SetPath (

Path	path	The path to follow.
bool	updateDestinationFromPath=true	If true, the destination property will be set to the end point of the path. If false, the previous destination value will be kept.

)

Make the AI follow the specified path.

In case the path has not been calculated, the script will call seeker.StartPath to calculate it. This means the AI may not actually start to follow the path until in a few frames when the path has been calculated. The pathPending field will as usual return true while the path is being calculated.

In case the path has already been calculated it will immediately replace the current path the AI is following. This is useful if you want to replace how the AI calculates its paths. Note that if you calculate the path using seeker.StartPath then this script will already pick it up because it is listening for all paths that the Seeker finishes calculating. In that case you do not need to call this function.

If you pass null as a parameter then the current path will be cleared and the agent will stop moving. Note than unless you have also disabled canSearch then the agent will soon recalculate its path and start moving again.

You can disable the automatic path recalculation by setting the canSearch field to false.

// Disable the automatic path recalculation
ai.canSearch = false;
var pointToAvoid = enemy.position;
// Make the AI flee from the enemy.
// The path will be about 20 world units long (the default cost of moving 1 world unit is 1000).
var path = FleePath.Construct(ai.position, pointToAvoid, 1000 * 20);
ai.SetPath(path);

// If you want to make use of properties like ai.reachedDestination or ai.remainingDistance or similar
// you should also set the destination property to something reasonable.
// Since the agent's own path recalculation is disabled, setting this will not affect how the paths are calculated.
// ai.destination = ...


void Teleport (

Vector3	newPosition
bool	clearPath=true

)

Instantly move the agent to a new position.

This will trigger a path recalculation (if clearPath is true, which is the default) so if you want to teleport the agent and change its destination it is recommended that you set the destination before calling this method.

The current path will be cleared by default.

AutoRepathPolicy autoRepath = new AutoRepathPolicy()

Determines how the agent recalculates its path automatically.

This corresponds to the settings under the "Recalculate Paths Automatically" field in the inspector.

bool canMove = true

Enables or disables movement completely.

If you want the agent to stand still, but still react to local avoidance and use gravity: use isStopped instead.

This is also useful if you want to have full control over when the movement calculations run. Take a look at MovementUpdate

Vector3 destination

bool enableRotation = true

If true, the AI will rotate to face the movement direction.

Vector3? endOfPath

End point of path the agent is currently following.

If the agent has no path (or it might not be calculated yet), this will return the destination instead. If the agent has no destination it either it will return (+inf,+inf,+inf).

The end of the path is usually identical or very close to the destination, but it may differ if the path for example was blocked by a wall so that the agent couldn't get any closer.

This is only updated when the path is recalculated.

bool hasPath

True if this agent currently has a path that it follows.

bool interpolatePathSwitches = true

If true, some interpolation will be done when a new path has been calculated.

This is used to avoid short distance teleportation.

bool isStopped

Gets or sets if the agent should stop moving.

If this is set to true the agent will immediately start to slow down as quickly as it can to come to a full stop. The agent will still react to local avoidance and gravity (if applicable), but it will not try to move in any particular direction.

The current path of the agent will not be cleared, so when this is set to false again the agent will continue moving along the previous path.

This is a purely user-controlled parameter, so for example it is not set automatically when the agent stops moving because it has reached the target. Use reachedEndOfPath for that.

If this property is set to true while the agent is traversing an off-mesh link (RichAI script only), then the agent will continue traversing the link and stop once it has completed it.

The steeringTarget property will continue to indicate the point which the agent would move towards if it would not be stopped.

System.Action onSearchPath

Called when the agent recalculates its path.

This is called both for automatic path recalculations (see canSearch) and manual ones (see SearchPath).

OrientationMode orientation = OrientationMode.ZAxisForward

Determines which direction the agent moves in.

For 3D games you most likely want the ZAxisIsForward option as that is the convention for 3D games. For 2D games you most likely want the YAxisIsForward option as that is the convention for 2D games.

Using the YAxisForward option will also allow the agent to assume that the movement will happen in the 2D (XY) plane instead of the XZ plane if it does not know. This is important only for the point graph which does not have a well defined up direction. The other built-in graphs (e.g the grid graph) will all tell the agent which movement plane it is supposed to use.

bool pathPending

True if a path is currently being calculated.

Vector3? position

Position of the agent.

In world space.

If you want to move the agent you may use Teleport or Move.

bool reachedDestination

True if the ai has reached the destination.

This is a best effort calculation to see if the destination has been reached. For the AIPath/RichAI scripts, this is when the character is within endReachedDistance world units from the destination. For the AILerp script it is when the character is at the destination (±a very small margin).

This value will be updated immediately when the destination is changed (in contrast to reachedEndOfPath), however since path requests are asynchronous it will use an approximation until it sees the real path result. What this property does is to check the distance to the end of the current path, and add to that the distance from the end of the path to the destination (i.e. is assumes it is possible to move in a straight line between the end of the current path to the destination) and then checks if that total distance is less than #endReachedDistance. This property is therefore only a best effort, but it will work well for almost all use cases.

Furthermore it will not report that the destination is reached if the destination is above the head of the character or more than half the height of the character below its feet (so if you have a multilevel building, it is important that you configure the height of the character correctly).

The cases which could be problematic are if an agent is standing next to a very thin wall and the destination suddenly changes to the other side of that thin wall. During the time that it takes for the path to be calculated the agent may see itself as alredy having reached the destination because the destination only moved a very small distance (the wall was thin), even though it may actually be quite a long way around the wall to the other side.

In contrast to reachedEndOfPath, this property is immediately updated when the destination is changed.

IEnumerator Start () {
ai.destination = somePoint;
// Start to search for a path to the destination immediately
ai.SearchPath();
// Wait until the agent has reached the destination
while (!ai.reachedDestination) {
yield return null;
}
// The agent has reached the destination now
}


bool reachedEndOfPath

True if the end of the current path has been reached.

float remainingDistance

Approximate remaining distance along the current path to the end of the path.

The RichAI movement script approximates this distance since it is quite expensive to calculate the real distance. However it will be accurate when the agent is within 1 corner of the destination. You can use GetRemainingPath to calculate the actual remaining path more precisely.

The AIPath and AILerp scripts use a more accurate distance calculation at all times.

If the agent does not currently have a path, then positive infinity will be returned.

Quaternion? rotation

Rotation of the agent.

In world space.

float rotationSpeed = 10

How quickly to rotate.

float speed = 3

Speed in world units.

float switchPathInterpolationSpeed = 5

How quickly to interpolate to the new path.

bool updatePosition = true

Determines if the character's position should be coupled to the Transform's position.

If false then all movement calculations will happen as usual, but the object that this component is attached to will not move instead only the position property will change.

bool updateRotation = true

Determines if the character's rotation should be coupled to the Transform's rotation.

If false then all movement calculations will happen as usual, but the object that this component is attached to will not rotate instead only the rotation property will change.

Vector3? velocity

Actual velocity that the agent is moving with.

In world units per second.

AILerp ()

void Awake ()

Initializes reference variables.

If you override this function you should in most cases call base.Awake () at the start of it.

Vector3 CalculateNextPosition (

out Vector3	direction	The tangent of the segment the AI is currently traversing. Not normalized.
float	deltaTime

)

Calculate the AI's next position (one frame in the future).

void ClearPath ()

Clears the current path of the agent.

Usually invoked using #SetPath(null)

void ConfigureNewPath ()

Finds the closest point on the current path and configures the interpolator.

void ConfigurePathSwitchInterpolation ()

void Init ()

void IAstarAI. Move (

Vector3

deltaPosition

Direction and distance to move the agent in world space.

)

Move the agent.

This is intended for external movement forces such as those applied by wind, conveyor belts, knockbacks etc.

Some movement scripts may ignore this completely (notably the AILerp script) if it does not have any concept of being moved externally.

The agent will not be moved immediately when calling this method. Instead this offset will be stored and then applied the next time the agent runs its movement calculations (which is usually later this frame or the next frame). If you want to move the agent immediately then call: ai.Move(someVector);
ai.FinalizeMovement(ai.position, ai.rotation);


void OnEnable ()

Called when the component is enabled.

void OnPathComplete (

Path

_p

)

Called when a requested path has finished calculation.

A path is first requested by SearchPath, it is then calculated, probably in the same or the next frame. Finally it is returned to the seeker which forwards it to this function.

int OnUpgradeSerializedData (

int	version
bool	unityThread

)

Handle serialization backwards compatibility.

void Reset ()

Handle serialization backwards compatibility.

Quaternion SimulateRotationTowards (

Vector3	direction
float	deltaTime

)

void Start ()

Starts searching for paths.

If you override this function you should in most cases call base.Start () at the start of it.

void Update ()

bool IAstarAI. canMove

Enables or disables movement completely.

If you want the agent to stand still, but still react to local avoidance and use gravity: use isStopped instead.

This is also useful if you want to have full control over when the movement calculations run. Take a look at MovementUpdate

bool IAstarAI. canSearch

Enables or disables recalculating the path at regular intervals.

Setting this to false does not stop any active path requests from being calculated or stop it from continuing to follow the current path.

Note that this only disables automatic path recalculations. If you call the SearchPath() method a path will still be calculated.

bool canSearchAgain = true

Only when the previous path has been returned should a search for a new path be done.

bool canSearchCompability = false

Vector3 IAstarAI. desiredVelocity

Vector3 IAstarAI. desiredVelocityWithoutLocalAvoidance

float IAstarAI. height

Height of the agent in world units.

This is visualized in the scene view as a yellow cylinder around the character.

This value is currently only used if an RVOController is attached to the same GameObject, otherwise it is only used for drawing nice gizmos in the scene view. However since the height value is used for some things, the radius field is always visible for consistency and easier visualization of the character. That said, it may be used for something in a future release.

PathInterpolator interpolator = new PathInterpolator()

float IAstarAI. maxSpeed

Max speed in world units per second.

ABPath path

Current path which is followed.

float pathSwitchInterpolationTime = 0

Time since the path was replaced by a new path.

Vector3 previousMovementDirection

Vector3 previousMovementOrigin

When a new path was returned, the AI was moving along this ray.

Used to smoothly interpolate between the previous movement and the movement along the new path. The speed is equal to movement direction.

Vector3 previousPosition1

Vector3 previousPosition2

float IAstarAI. radius

Radius of the agent in world units.

This is visualized in the scene view as a yellow cylinder around the character.

float repathRateCompatibility = float.NaN

Seeker seeker

Cached Seeker component.

bool shouldRecalculatePath

True if the path should be automatically recalculated as soon as possible.

Vector3 simulatedPosition

Quaternion simulatedRotation

bool startHasRun = false

Holds if the Start function has been run.

Used to test if coroutines should be started in OnEnable to prevent calculating paths in the awake stage (or rather before start on frame 0).

Vector3 IAstarAI.? steeringTarget

Point on the path which the agent is currently moving towards.

This is usually a point a small distance ahead of the agent or the end of the path.

If the agent does not have a path at the moment, then the agent's current position will be returned.

Transform targetCompatibility

Required for serialization backward compatibility.

Transform tr

Cached Transform component.

void ForceSearchPath ()

Requests a path to the target.

bool? canSearch

Enables or disables recalculating the path at regular intervals.

Setting this to false does not stop any active path requests from being calculated or stop it from continuing to follow the current path.

Note that this only disables automatic path recalculations. If you call the SearchPath() method a path will still be calculated.

float repathRate

Determines how often it will search for new paths.

If you have fast moving targets or AIs, you might want to set it to a lower value. The value is in seconds between path requests.

bool? rotationIn2D

If true, the forward axis of the character will be along the Y axis instead of the Z axis.

Transform?? target

Target to move towards.

The AI will try to follow/move towards this target. It can be a point on the ground where the player has clicked in an RTS for example, or it can be the player object in a zombie game.