85 lines
3.0 KiB
C#
85 lines
3.0 KiB
C#
|
using UnityEngine;
|
||
|
|
|
||
|
|
namespace BehaviorDesigner.Runtime.Tasks.Movement
|
||
|
|
{
|
||
|
|
[TaskDescription("Flee from the target specified using the Unity NavMesh.")]
|
||
|
|
[TaskCategory("Movement")]
|
||
|
|
[HelpURL("https://www.opsive.com/support/documentation/behavior-designer-movement-pack/")]
|
||
|
|
[TaskIcon("e5f0ffa5bd82433428ba4d2dd58d57d8", "e1a2340aca5184f4ba0f3e3163864b8e")]
|
||
|
|
public class Flee : NavMeshMovement
|
||
|
|
{
|
||
|
|
[Tooltip("The agent has fleed when the magnitude is greater than this value")]
|
||
|
|
[UnityEngine.Serialization.FormerlySerializedAs("fleedDistance")]
|
||
|
|
public SharedFloat m_FleedDistance = 20;
|
||
|
|
[Tooltip("The distance to look ahead when fleeing")]
|
||
|
|
[UnityEngine.Serialization.FormerlySerializedAs("lookAheadDistance")]
|
||
|
|
public SharedFloat m_LookAheadDistance = 5;
|
||
|
|
[Tooltip("The GameObject that the agent is fleeing from")]
|
||
|
|
[UnityEngine.Serialization.FormerlySerializedAs("target")]
|
||
|
|
public SharedGameObject m_Target;
|
||
|
|
|
||
|
|
private bool m_HasMoved;
|
||
|
|
|
||
|
|
public override void OnStart()
|
||
|
|
{
|
||
|
|
base.OnStart();
|
||
|
|
|
||
|
|
m_HasMoved = false;
|
||
|
|
|
||
|
|
SetDestination(Target());
|
||
|
|
}
|
||
|
|
|
||
|
|
// Flee from the target. Return success once the agent has fleed the target by moving far enough away from it
|
||
|
|
// Return running if the agent is still fleeing
|
||
|
|
public override TaskStatus OnUpdate()
|
||
|
|
{
|
||
|
|
if (Vector3.Magnitude(transform.position - m_Target.Value.transform.position) > m_FleedDistance.Value) {
|
||
|
|
return TaskStatus.Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (HasArrived()) {
|
||
|
|
if (!m_HasMoved) {
|
||
|
|
return TaskStatus.Failure;
|
||
|
|
}
|
||
|
|
if (!SetDestination(Target())) {
|
||
|
|
return TaskStatus.Failure;
|
||
|
|
}
|
||
|
|
m_HasMoved = false;
|
||
|
|
} else {
|
||
|
|
// If the agent is stuck the task shouldn't continue to return a status of running.
|
||
|
|
var velocityMagnitude = Velocity().sqrMagnitude;
|
||
|
|
if (m_HasMoved && velocityMagnitude <= 0f) {
|
||
|
|
return TaskStatus.Failure;
|
||
|
|
}
|
||
|
|
m_HasMoved = velocityMagnitude > 0f;
|
||
|
|
}
|
||
|
|
|
||
|
|
return TaskStatus.Running;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Flee in the opposite direction
|
||
|
|
private Vector3 Target()
|
||
|
|
{
|
||
|
|
return transform.position + (transform.position - m_Target.Value.transform.position).normalized * m_LookAheadDistance.Value;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return false if the position isn't valid on the NavMesh.
|
||
|
|
protected override bool SetDestination(Vector3 destination)
|
||
|
|
{
|
||
|
|
if (!SamplePosition(ref destination)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return base.SetDestination(destination);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Reset the public variables
|
||
|
|
public override void OnReset()
|
||
|
|
{
|
||
|
|
base.OnReset();
|
||
|
|
|
||
|
|
m_FleedDistance = 20;
|
||
|
|
m_LookAheadDistance = 5;
|
||
|
|
m_Target = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|