41 lines
1.1 KiB
C#
41 lines
1.1 KiB
C#
using System.Collections.Generic;
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namespace SemiColinGames {
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public interface IState<T> {
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// Called automatically whenever this state is transitioned to. Should reset whichever
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// state-specific variables need resetting.
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public void Enter();
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// Returns the name of the new state, or null if we should stay in the same state.
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public string Update(float modelTime, World world, T input);
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}
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public class FSM<T> {
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readonly Dictionary<string, IState<T>> states;
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public FSM(string initialStateName, Dictionary<string, IState<T>> states) {
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this.states = states;
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StateName = initialStateName;
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Transition(StateName);
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}
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public string StateName { get; private set; }
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public IState<T> State { get; private set; }
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public void Update(float modelTime, World world, T input) {
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string newState = State.Update(modelTime, world, input);
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if (newState != null) {
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Transition(newState);
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}
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}
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void Transition(string state) {
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StateName = state;
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IState<T> newState = states[state];
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State = newState;
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State.Enter();
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}
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}
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}
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