95 lines
3.4 KiB
C#
95 lines
3.4 KiB
C#
using Unity.Burst;
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using Unity.Collections;
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using Unity.Jobs;
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using Unity.Mathematics;
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namespace SepCore.Simulation
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{
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internal static class EnemyMovementSystem
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{
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// 读写集：R EnemyTransform / EnemyMoveInput / EnemyAttack；W EnemyTransform / EnemyBehavior
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public static JobHandle Schedule(EnemyStore enemies, float deltaTime, float3 playerPosition,
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JobHandle dependency)
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{
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int enemyCount = enemies.Count;
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if (enemyCount == 0)
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{
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return dependency;
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}
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EnemyMovementJob job = new EnemyMovementJob
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{
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Transforms = enemies.Transform.Data.AsArray(),
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MoveInputs = enemies.MoveInput.Data.AsArray(),
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Attacks = enemies.Attack.Data.AsArray(),
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Behaviors = enemies.Behavior.Data.AsArray(),
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DeltaTime = deltaTime,
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PlayerPosition = playerPosition
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};
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return job.Schedule(enemyCount, 64, dependency);
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}
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}
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[BurstCompile]
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internal struct EnemyMovementJob : IJobParallelFor
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{
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public NativeArray<EnemyTransformSim> Transforms;
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[ReadOnly] public NativeArray<EnemyMoveInputSim> MoveInputs;
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[ReadOnly] public NativeArray<EnemyAttackSim> Attacks;
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public NativeArray<EnemyBehaviorSim> Behaviors;
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public float DeltaTime;
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public float3 PlayerPosition;
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public void Execute(int index)
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{
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EnemyMoveInputSim moveInput = MoveInputs[index];
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EnemyAttackSim attack = Attacks[index];
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EnemyTransformSim transform = Transforms[index];
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float attackRange = attack.AttackRange > 0f ? attack.AttackRange : EnemyAttackSim.DefaultAttackRange;
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float attackRangeSqr = attackRange * attackRange;
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float3 currentPosition = transform.Position;
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float3 horizontalPosition = new float3(currentPosition.x, 0f, currentPosition.z);
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float3 toPlayer = PlayerPosition - horizontalPosition;
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float sqrDistance = math.lengthsq(toPlayer);
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bool isInAttackRange = sqrDistance <= attackRangeSqr;
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bool canChase = !isInAttackRange && moveInput.Speed > 0f && sqrDistance > float.Epsilon;
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float3 forward = transform.Forward;
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float3 desiredPosition = currentPosition;
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quaternion rotation = transform.Rotation;
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if (canChase)
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{
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forward = math.normalizesafe(toPlayer, forward);
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desiredPosition = currentPosition + forward * moveInput.Speed * DeltaTime;
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if (math.lengthsq(forward) > float.Epsilon)
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{
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rotation = quaternion.LookRotationSafe(forward, math.up());
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}
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}
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int nextState;
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if (isInAttackRange)
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{
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nextState = EnemyBehaviorSim.StateInAttackRange;
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}
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else if (canChase)
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{
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nextState = EnemyBehaviorSim.StateChasing;
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}
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else
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{
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nextState = EnemyBehaviorSim.StateIdle;
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}
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transform.Position = desiredPosition;
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transform.Forward = forward;
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transform.Rotation = rotation;
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Transforms[index] = transform;
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Behaviors[index] = new EnemyBehaviorSim { State = nextState };
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}
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}
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}
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