78 lines
2.8 KiB
C#
78 lines
2.8 KiB
C#
using Unity.Mathematics;
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namespace DanieleMarotta.RiversongCodeShowcase
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{
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[GameSystemGroup(typeof(EarlyAgentsSystemGroup))]
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[UpdateAfter(typeof(AgentSpawnSystemsGroup))]
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public class HunterBehaviorSystem : GameSystem, IUpdatable
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{
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private const int HunterFireRange = 8;
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[InjectService]
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private IEntityCollection _entityCollection;
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[InjectService]
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private IEntityCache _entityCache;
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[InjectService]
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private ITileSpace _tileSpace;
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[InjectService]
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private IIntentLogicExecutor _intentLogicExecutor;
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[InjectService]
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private IProjectileManager _projectileManager;
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public HunterBehaviorSystem(IServiceLocator serviceLocator) : base(serviceLocator)
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{
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}
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public void Update()
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{
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foreach (var hunter in _entityCache.GetHunterAgents())
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{
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if (hunter.LifecycleState != AgentLifecycleState.Live) continue;
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ref var jobState = ref hunter.GetJobStateRW();
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if (jobState.StateMachineStep != AgentStateMachineStep.Hunter_SeekingPrey) continue;
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if (UpdateSeekingPrey(hunter)) jobState.StateMachineStep = AgentStateMachineStep.ReturningHome;
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}
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}
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private bool UpdateSeekingPrey(Agent hunter)
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{
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const float hunterRangeSq = HunterFireRange * HunterFireRange;
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if (!_entityCollection.TryGet<Building>(hunter.HomeId, out var hunterBuilding)) return false;
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var hunterTile = _tileSpace.WorldToTile(hunter.Position);
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var critterDefinitionId = hunterBuilding.Definition.TargetCritter.RuntimeId;
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foreach (var critter in _entityCache.GetCritterAgents())
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{
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ref var critterState = ref critter.GetCritterStateRW();
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if (critterState.CritterDefinitionId != critterDefinitionId || critter.LifecycleState != AgentLifecycleState.Live || critterState.LockId != Entity.InvalidId)
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continue;
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var critterTile = _tileSpace.WorldToTile(critter.Position);
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if (math.distancesq(hunterTile, critterTile) > hunterRangeSq) continue;
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critterState.LockId = hunter.Id;
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ref var hunterIntentQueue = ref _intentLogicExecutor.CancelRemainingIntents(hunter);
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var projectileTravelTime = _projectileManager.ComputeProjectileTravelTime(hunter, critter);
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IntentQueue.FireAtPreyAndReturnHome(ref hunterIntentQueue, hunterBuilding.Rect, hunterBuilding.Id, critterTile, critter.Id, projectileTravelTime);
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ref var critterIntentQueue = ref _intentLogicExecutor.CancelRemainingIntents(critter);
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critterIntentQueue.EnqueueIntent(AgentIntent.WaitForever());
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return true;
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}
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return false;
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}
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}
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} |