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77 行
2.1 KiB
77 行
2.1 KiB
namespace UOP1.StateMachine
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{
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public class StateTransition : IStateComponent
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{
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private State _targetState;
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private StateCondition[] _conditions;
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private int[] _resultGroups;
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private bool[] _results;
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internal StateTransition() { }
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public StateTransition(State targetState, StateCondition[] conditions, int[] resultGroups = null)
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{
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Init(targetState, conditions, resultGroups);
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}
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internal void Init(State targetState, StateCondition[] conditions, int[] resultGroups = null)
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{
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_targetState = targetState;
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_conditions = conditions;
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_resultGroups = resultGroups != null && resultGroups.Length > 0 ? resultGroups : new int[1];
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_results = new bool[_resultGroups.Length];
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}
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/// <summary>
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/// Checks wether the conditions to transition to the target state are met.
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/// </summary>
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/// <param name="state">Returns the state to transition to. Null if the conditions aren't met.</param>
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/// <returns>True if the conditions are met.</returns>
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public bool TryGetTransiton(out State state)
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{
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state = ShouldTransition() ? _targetState : null;
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return state != null;
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}
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public void OnStateEnter()
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{
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for (int i = 0; i < _conditions.Length; i++)
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_conditions[i]._condition.OnStateEnter();
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}
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public void OnStateExit()
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{
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for (int i = 0; i < _conditions.Length; i++)
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_conditions[i]._condition.OnStateExit();
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}
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private bool ShouldTransition()
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{
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#if UNITY_EDITOR
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_targetState._stateMachine._debugger.TransitionEvaluationBegin(_targetState._originSO.name);
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#endif
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int count = _resultGroups.Length;
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for (int i = 0, idx = 0; i < count && idx < _conditions.Length; i++)
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for (int j = 0; j < _resultGroups[i]; j++, idx++)
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_results[i] = j == 0 ?
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_conditions[idx].IsMet() :
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_results[i] && _conditions[idx].IsMet();
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bool ret = false;
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for (int i = 0; i < count && !ret; i++)
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ret = ret || _results[i];
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#if UNITY_EDITOR
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_targetState._stateMachine._debugger.TransitionEvaluationEnd(ret, _targetState._actions);
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#endif
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return ret;
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}
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internal void ClearConditionsCache()
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{
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for (int i = 0; i < _conditions.Length; i++)
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_conditions[i]._condition.ClearStatementCache();
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}
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}
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}
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