Question Instantiating a sword prefab on an enemy

Hello,

I'm hoping that someone might be able to point me in the right direction. I'm trying to spawn a sword next to an enemy. I've done lots of testing and I can see that an entity is being assigned to the sword prefab component that I've baked into enemy, but no sword appears. While testing, I did notice that the scale for the prefab was set to zero, but even changing that to a ridiculously high number produced no results.

Here is the code I have so far...it is extremely janky. I've twisted everything around trying to get this to work and I'm just returning to programming after being away for nearly a decade!

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using System;
4. using Unity.Entities;
5. using Unity.Burst;
6. using UnityEngine;
7. using TMPro;
8. using Unity.Transforms;
9. using Unity.Mathematics;
10. using Unity.Collections;
11.  
12. namespace Moonworld
13. {
14.     public partial struct EnemyAttackSystem : ISystem
15.     {
16.  
17.         public Entity _playerEntity;
18.  
19.  
20.         void OnCreate(ref SystemState state)
21.         {
22.             state.RequireForUpdate<CombatComponent>();
23.         }
24.  
25.         void OnUpdate(ref SystemState state)
26.         {
27.  
28.             // Get query and then array to access enemies in the foreach
29.             var query = state.EntityManager.CreateEntityQuery(typeof(Enemy));
30.             var enemyEntities = query.ToEntityArray(Allocator.TempJob);
31.  
32.             int iTracker = 0;
33.  
34.             var ecbSingletonForEach = SystemAPI.GetSingleton<EndSimulationEntityCommandBufferSystem.Singleton>();
35.             EntityCommandBuffer ecbForEach = ecbSingletonForEach.CreateCommandBuffer(state.WorldUnmanaged);
36.  
37.             foreach (var (enemy, sword) in SystemAPI.Query<RefRO<Enemy>, RefRW<SwordComponent>>())
38.             {
39.  
40.                 if (enemy.ValueRO.currentState == 1)
41.  
42.                 {
43.                     if (enemy.ValueRO.isSwordOut == false)
44.                     {                    
45.                         Entity swordEntity = state.EntityManager.Instantiate(sword.ValueRW.swordPrefab);
46.                         ecbForEach.AddComponent(swordEntity, new Parent { Value = enemyEntities[iTracker] });
47.                         Debug.Log(swordEntity + " /// " + enemyEntities[iTracker].ToString());
48.                     }
49.                 }
50.  
51.                 if (enemy.ValueRO.currentState == 0)
52.                 {
53.                     if (enemy.ValueRO.isSwordOut == true)
54.                     {
55.                         // DESPAWN SWORD
56.                         /*Entity swordEntity = state.EntityManager.Instantiate(sword.ValueRW.swordPrefab);
57.                         Debug.Log("Sword entity spawned");*/
58.                     }
59.                 }
60.  
61.                 iTracker++;
62.  
63.             }
64.  
65.             var ecbSingleton = SystemAPI.GetSingleton<EndSimulationEntityCommandBufferSystem.Singleton>();
66.  
67.             new EnemySwordCheckJob { ecb = ecbSingleton.CreateCommandBuffer(state.WorldUnmanaged) }.Schedule();
68.  
69.         }
70.  
71.  
72.  
73.  
74.     }
75.  
76. }

And here is the job referenced at the end of the last piece of code.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using System;
4. using Unity.Entities;
5. using Unity.Burst;
6. using UnityEngine;
7. using TMPro;
8. using Unity.Transforms;
9. using Unity.Mathematics;
10.  
11.  
12. namespace Moonworld
13. {
14.     [BurstCompile]
15.     [WithAll(typeof(Enemy))]
16.     public partial struct EnemySwordCheckJob : IJobEntity
17.     {
18.         public EntityCommandBuffer ecb;
19.  
20.         // Check enemy's current state and then update whether its sword should be out or not
21.         [BurstCompile]
22.         private void Execute(ref Enemy enemy, ref SwordComponent sword, ref LocalTransform transform)
23.         {
24.  
25.             //Debug.Log(enemy.ValueRO.currentState);
26.             if (enemy.currentState == 1)
27.             {
28.                 if (enemy.isSwordOut == false)
29.                 {
30.                     enemy.isSwordOut = true;
31.                     Debug.Log("Sword entity transform being set...");
32.                     ecb.SetComponent(sword.swordPrefab, new LocalTransform {
33.                         Position = new float3 (transform.Position.x + 1, transform.Position.y + 1, transform.Position.z) });
34.                 }
35.             }
36.  
37.             if (enemy.currentState == 0)
38.             {
39.                 if (enemy.isSwordOut == true)
40.                 {
41.                     enemy.isSwordOut = false;
42.                 }
43.             }
44.  
45.         }
46.     }
47.  
48. }

Any help is appreciated! I feel like there is a far more elegant solution to this, but I've found it very challenging to access the variables I need in both systems and in jobs. I can also provide code for the baker if that would help.

Thank you!

 

Figured it out

 

Good for you ! but how ?
It's quite frustrating for someone looking to fix an issue and finding a post saying I have this issue, then saying fixed it but 'ot explaining neither what was the cause of the issue 'or the way it was fixed.
Not saying I have the issue, just reminding that someone might like to know the answer in the future.