So I am working on a project that has a bunch of dynamic fog objects and I wanted to try and use DOTS for it basically it is a ton of small sprites that shrink when the player approaches. I got all that working fine and now I need to update the objects with the players position.
I tried directly passing in the players transform but that didn’t work so I settled on passing a vector2. However I was unable to update this vector2 in the authoring script or even debug.log I think this is due to the entity being in a sub scene or due to it being an entity and now I’m looking for a fix.
FogAuthoring.cs
using System.Collections;
using System.Collections.Generic;
using Unity.Entities;
using Unity.Mathematics;
using UnityEngine;
public class FogAuthoring : MonoBehaviour
{
public float LerpSpeed;
public float TargetScale;
public float2 PlayerPosition;
private Transform _player;
private void Start()
{
_player = GameObject.FindWithTag("Player").transform;
Debug.Log("A");
}
private void Update()
{
PlayerPosition = new float2(_player.position.x, _player.position.y);
Debug.Log("B");
}
private class Baker : Baker<FogAuthoring>
{
public override void Bake(FogAuthoring authoring)
{
Entity entity = GetEntity(TransformUsageFlags.Dynamic);
AddComponent(entity, new FogData
{
LerpSpeed = authoring.LerpSpeed,
TargetScale = authoring.TargetScale,
PlayerPosition = authoring.PlayerPosition
});
}
}
}
public struct FogData : IComponentData
{
public float LerpSpeed;
public float TargetScale;
public float2 PlayerPosition;
}
FogControllerDOTS.cs
using System.Collections
using System.Collections.Generic;
using UnityEngine;
using Unity.Burst;
using Unity.Entities;
using Unity.Transforms;
using Unity.Jobs;
public partial struct FogControllerDOTS : ISystem
{
public const float distThreshold = 5;
public void OnCreate(ref SystemState state)
{
state.RequireForUpdate<FogData>();
}
[BurstCompile]
public void OnUpdate(ref SystemState state)
{
/*
foreach ((RefRW<LocalTransform> localTransform, RefRO<FogData> fogData) in SystemAPI.Query<RefRW<LocalTransform>, RefRO<FogData>>())
{
float currentScale = localTransform.ValueRO.Scale;
float targetScale;
if (Vector2.Distance(new Vector2(localTransform.ValueRO.Position.x, localTransform.ValueRO.Position.y), fogData.ValueRO.PlayerPosition) <= distThreshold)
targetScale = Mathf.Lerp(currentScale, 0, fogData.ValueRO.LerpSpeed * SystemAPI.Time.DeltaTime);
else
targetScale = Mathf.Lerp(currentScale, fogData.ValueRO.TargetScale, fogData.ValueRO.LerpSpeed * SystemAPI.Time.DeltaTime);
localTransform.ValueRW = localTransform.ValueRO.WithScale(targetScale);
}*/
FogParticleJob fogParticleJob = new FogParticleJob
{
deltaTime = SystemAPI.Time.DeltaTime
};
fogParticleJob.ScheduleParallel();
}
[BurstCompile]
public partial struct FogParticleJob : IJobEntity
{
public float deltaTime;
public void Execute(ref LocalTransform localTransform, in FogData fogData)
{
float currentScale = localTransform.Scale;
float targetScale;
if (Vector2.Distance(new Vector2(localTransform.Position.x, localTransform.Position.y), fogData.PlayerPosition) <= distThreshold)
targetScale = Mathf.Lerp(currentScale, 0, fogData.LerpSpeed * deltaTime);
else
targetScale = Mathf.Lerp(currentScale, fogData.TargetScale, fogData.LerpSpeed * deltaTime);
localTransform = localTransform.WithScale(targetScale);
}
}
}
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