111 lines
4.0 KiB
C#
111 lines
4.0 KiB
C#
/// ---------------------------------------------
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/// Behavior Designer
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/// Copyright (c) Opsive. All Rights Reserved.
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/// https://www.opsive.com
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/// ---------------------------------------------
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namespace Opsive.BehaviorDesigner.Samples
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{
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using Opsive.BehaviorDesigner.Runtime.Components;
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using Opsive.BehaviorDesigner.Runtime.Tasks;
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using Opsive.GraphDesigner.Runtime;
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using Unity.Entities;
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using UnityEngine;
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using System;
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[Tooltip("Damages any entity that has the HealthComponent.")]
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[Shared.Utility.Category("Behavior Designer Samples/DOTS")]
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public class Damage : ECSActionTask<DamageTaskSystem, DamageComponent>
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{
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[Tooltip("The amount of damage to apply.")]
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[SerializeField] float m_DamageAmount;
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/// <summary>
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/// The type of flag that should be enabled when the task is running.
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/// </summary>
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public override ComponentType Flag { get => typeof(DamageFlag); }
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/// <summary>
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/// Resets the task to its default values.
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/// </summary>
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public override void Reset() { m_DamageAmount = 1; }
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/// <summary>
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/// Returns a new TBufferElement for use by the system.
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/// </summary>
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/// <returns>A new TBufferElement for use by the system.</returns>
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public override DamageComponent GetBufferElement()
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{
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return new DamageComponent()
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{
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Index = RuntimeIndex,
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DamageAmount = m_DamageAmount,
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};
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}
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}
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/// <summary>
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/// The DOTS data structure for the Damage struct.
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/// </summary>
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public struct DamageComponent : IBufferElementData
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{
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[Tooltip("The index of the node.")]
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public ushort Index;
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[Tooltip("The amount of damage to apply.")]
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public float DamageAmount;
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}
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/// <summary>
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/// A DOTS flag indicating when a Fire node is active.
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/// </summary>
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public struct DamageFlag : IComponentData, IEnableableComponent { }
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/// <summary>
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/// Runs the Damage logic.
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/// </summary>
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[DisableAutoCreation]
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public partial class DamageTaskSystem : SystemBase
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{
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public Action<float> OnDamage;
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/// <summary>
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/// Updates the logic.
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/// </summary>
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protected override void OnUpdate()
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{
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var ecb = new EntityCommandBuffer(WorldUpdateAllocator);
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foreach (var (branchComponents, taskComponents, damageComponents) in
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SystemAPI.Query<DynamicBuffer<BranchComponent>, DynamicBuffer<TaskComponent>, DynamicBuffer<DamageComponent>>().WithAll<DamageFlag, EvaluateFlag>()) {
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for (int i = 0; i < damageComponents.Length; ++i) {
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var damageComponent = damageComponents[i];
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var taskComponent = taskComponents[damageComponent.Index];
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var branchComponent = branchComponents[taskComponent.BranchIndex];
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if (!branchComponent.CanExecute) {
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continue;
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}
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if (taskComponent.Status != TaskStatus.Queued) {
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continue;
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}
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// Apply the damage.
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foreach (var (healthComponent, entity) in SystemAPI.Query<RefRW<HealthComponent>>().WithEntityAccess()) {
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healthComponent.ValueRW.Value -= damageComponent.DamageAmount;
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if (healthComponent.ValueRO.Value <= 0) {
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ecb.AddComponent<DestroyEntityTag>(entity);
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}
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OnDamage?.Invoke(healthComponent.ValueRO.Value);
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}
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// The task will always return immediately.
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taskComponent.Status = TaskStatus.Success;
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var taskComponentBuffer = taskComponents;
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taskComponentBuffer[damageComponent.Index] = taskComponent;
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}
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}
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ecb.Playback(EntityManager);
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ecb.Dispose();
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}
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}
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} |