104 lines
3.5 KiB
C#
104 lines
3.5 KiB
C#
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using NodeCanvas.BehaviourTrees;
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using NodeCanvas.Framework;
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using ParadoxNotion.Design;
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using UnityEngine;
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namespace NodeCanvas.StateMachines
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{
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[Name("Sub BehaviourTree")]
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[Description("Execute a Behaviour Tree OnEnter. OnExit that Behavior Tree will be stoped or paused based on the relevant specified setting. You can optionaly specify a Success Event and a Failure Event which will be sent when the BT's root node status returns either of the two. If so, use alongside with a CheckEvent on a transition.")]
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[DropReferenceType(typeof(BehaviourTree))]
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[ParadoxNotion.Design.Icon("BT")]
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public class NestedBTState : FSMStateNested<BehaviourTree>
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{
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public enum BTExecutionMode
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{
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Once,
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Repeat
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}
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public enum BTExitMode
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{
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StopAndRestart,
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PauseAndResume
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}
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[SerializeField, ExposeField, Name("Sub Tree")]
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private BBParameter<BehaviourTree> _nestedBT = null;
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[Tooltip("What will happen to the BT when this state exits.")]
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public BTExitMode exitMode = BTExitMode.StopAndRestart;
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[Tooltip("Sould the BT repeat?")]
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public BTExecutionMode executionMode = BTExecutionMode.Repeat;
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[DimIfDefault, Tooltip("The event to send when the BT finish in Success.")]
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public string successEvent;
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[DimIfDefault, Tooltip("The event to send when the BT finish in Failure.")]
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public string failureEvent;
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public override BehaviourTree subGraph { get { return _nestedBT.value; } set { _nestedBT.value = value; } }
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public override BBParameter subGraphParameter => _nestedBT;
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//
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protected override void OnEnter() {
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if ( subGraph == null ) {
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Finish(false);
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return;
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}
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currentInstance = (BehaviourTree)this.CheckInstance();
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currentInstance.repeat = ( executionMode == BTExecutionMode.Repeat );
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currentInstance.updateInterval = 0;
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this.TryWriteAndBindMappedVariables();
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currentInstance.StartGraph(graph.agent, graph.blackboard.parent, Graph.UpdateMode.Manual, OnFinish);
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OnUpdate();
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}
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protected override void OnUpdate() {
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currentInstance.UpdateGraph(this.graph.deltaTime);
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if ( !string.IsNullOrEmpty(successEvent) && currentInstance.rootStatus == Status.Success ) {
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currentInstance.Stop(true);
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}
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if ( !string.IsNullOrEmpty(failureEvent) && currentInstance.rootStatus == Status.Failure ) {
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currentInstance.Stop(false);
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}
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}
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void OnFinish(bool success) {
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if ( this.status == Status.Running ) {
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this.TryReadAndUnbindMappedVariables();
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if ( !string.IsNullOrEmpty(successEvent) && success ) {
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SendEvent(successEvent);
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}
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if ( !string.IsNullOrEmpty(failureEvent) && !success ) {
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SendEvent(failureEvent);
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}
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Finish(success);
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}
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}
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protected override void OnExit() {
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if ( currentInstance != null ) {
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if ( this.status == Status.Running ) {
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this.TryReadAndUnbindMappedVariables();
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}
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if ( exitMode == BTExitMode.StopAndRestart ) {
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currentInstance.Stop();
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} else {
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currentInstance.Pause();
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}
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}
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}
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}
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}
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