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Copy pathGsStateMachine.cs
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151 lines (130 loc) · 4.68 KB
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using System.Collections;
using System.Collections.Generic;
using UnityEngine;
//有限状态机的轻量级实现, 可以导入Animator的数据， 实现逻辑模拟Animator
public class GsStateMachine : MonoBehaviour
{
public delegate void OnStateChanged(GsState oldState, GsState newState, GsStateTransition transition);
public OnStateChanged onStateChanged = null;
public GsStateMachineData data;
private GsStateMachineData instanceData;
private GsStateTransition[] AnyStateTransitions;
private StateEntity[] States;
private string DefaultStateName;
[HideInInspector]
[System.NonSerialized]
public Dictionary<string, Parameter> parameters = new Dictionary<string, Parameter>();
private StateEntity current;
private Dictionary<string, StateEntity> stateDic = new Dictionary<string, StateEntity>();
private void LoadData()
{
instanceData = GameObject.Instantiate(data);
States = instanceData.States;
DefaultStateName = instanceData.DefaultStateName;
AnyStateTransitions = instanceData.AnyStateTransitions;
for (int i = 0; i < instanceData.Parameters.Length; i++)
{
parameters[instanceData.Parameters[i].name] = instanceData.Parameters[i];
}
}
// Use this for initialization
void Start()
{
LoadData();
if (States.Length > 0)
{
for (int i = 0; i < States.Length; ++i)
{
if (States[i].State != null)
{
States[i].State.enabled = false;
stateDic[States[i].State.name] = States[i];
}
}
}
enterState(stateDic[DefaultStateName]);
}
void LateUpdate()
{
if (current == null)
return;
GsStateTransition chosenTransition = null;
for (int i = 0; i < AnyStateTransitions.Length; ++i)
{
GsStateTransition tr = AnyStateTransitions[i];
if (tr != null
&& (chosenTransition == null || tr.Priority > chosenTransition.Priority)
&& (tr.Cond != null && tr.Cond.IsSatisfied(this, current.State, tr))
)
chosenTransition = tr;
}
//any state transition priority > current state
if (chosenTransition == null && current != null && current.Transitions != null)
{
for (int i = 0; i < current.Transitions.Length; ++i)
{
GsStateTransition tr = current.Transitions[i];
if (tr != null &&
(chosenTransition == null || tr.Priority > chosenTransition.Priority) &&
(tr.Cond != null && (tr.Cond.IsSatisfied(this, current.State, tr)))
)
chosenTransition = tr;
}
}
if (chosenTransition != null)
{
leaveCurrentState();
StateEntity nextStateEntity = stateDic[chosenTransition.nextStateName];
if (onStateChanged != null)
{
onStateChanged(current.State, nextStateEntity.State, chosenTransition);
}
enterState(nextStateEntity);
}
else
{
current.State.OnStateUpdate(Time.deltaTime);
}
}
private void leaveCurrentState()
{
if (current != null && current.State != null)
{
current.State.OnStateExit();
current.State.enabled = false;
}
}
private void enterState(StateEntity newState)
{
if (newState != null && newState.State != null)
{
newState.State.enabled = true;
newState.State.OnStateEnter();
current = newState;
}
}
public StateEntity GetCurrentState()
{
return current;
}
public void SetTrigger(string paramName)
{
parameters[paramName].boolValue = true;
parameters[paramName].paramType = ParamType.ParamType_Trigger;
}
public void SetInteger(string paramName, int value)
{
parameters[paramName].intValue = value;
parameters[paramName].paramType = ParamType.ParamType_Int;
}
public void SetFloat(string paramName, float value)
{
parameters[paramName].floatValue = value;
parameters[paramName].paramType = ParamType.ParamType_Float;
}
public void SetBool(string paramName, bool value)
{
parameters[paramName].boolValue = value;
parameters[paramName].paramType = ParamType.ParamType_Bool;
}
}