Question Entity movement with ECS

Hello,

I`m trying to implement basic movement system for entity with LocalToWorld since Translation is not available. I have this code but entity is still not changing position. I need to move prefab which spawns when space is hit. Any ideas what i need to change?


public struct MovementSpeedComponent : IComponentData
{
public float speed;
public LocalTransform localTransform;
}

public class MovementSpeedAuthoring : MonoBehaviour
{

public float speed;

}

public class speedBaker : Baker<MovementSpeedAuthoring>
{
public override void Bake(MovementSpeedAuthoring authoring)
{
var entity = GetEntity(TransformUsageFlags.Dynamic);
AddComponent(entity, new MovementSpeedComponent
{
speed = authoring.speed

}) ;
}
}


public partial class MovementSystem : SystemBase
{
protected override void OnUpdate()
{
float deltaTime = SystemAPI.Time.DeltaTime;

Entities.ForEach((ref LocalToWorld localToWorld, ref MovementSpeedComponent movementSpeed) =>
{
float3 inputDirection = new float3(UnityEngine.Input.GetAxis("Horizontal"), 0f, UnityEngine.Input.GetAxis("Vertical"));
float3 movement = math.normalize(inputDirection) * movementSpeed.speed;

float3 newPosition = movementSpeed.localTransform.Position + movement;

movementSpeed.localTransform.Position = newPosition;

localToWorld.Value = movementSpeed.localTransform.ToMatrix();

}).Schedule();
}
}

 

I don't think you can set the localToWorld, it is calculated in some system. You need to set the localTransform with LocalTransform.FromPosition(newPosition).

 

Thank you. It took me some time to figure out how it works.
here is updated code if someone will need it

My component has speed and LocalTransform attributes. And Baker.
public partial class MovementSystem : SystemBase
{
protected override void OnUpdate()
{
float deltaTime = SystemAPI.Time.DeltaTime;

float horizontalInput = Input.GetAxis("Horizontal");
float verticalInput = Input.GetAxis("Vertical");

Entities.ForEach((ref MovementSpeedComponent movementSpeed, ref LocalTransform transform) =>
{
Vector3 newPosition = transform.Position;

if (horizontalInput != 0f)
{
newPosition.x += horizontalInput * movementSpeed.speed * deltaTime;
}
if (verticalInput != 0f)
{
newPosition.z += verticalInput * movementSpeed.speed * deltaTime;
}

transform.Position = newPosition;
}).ScheduleParallel();
}
}


However, it is harder because before i used Vector3 instead of float, and it was more simple.