ComponentDataFromEntity<Translation> allTranslations = GetComponentDataFromEntity<Translation>(true);

....

public class TargetToDirectionSystem : SystemBase
{
    protected override void OnUpdate()
    {
        Entities.
            WithNone<PlayerTag>().
            WithAll<ChaserTag>().
            ForEach((ref MoveData moveData, ref Rotation rot, in Translation pos, in TargetData targetData) =>
            {
                ComponentDataFromEntity<Translation> allTranslations = GetComponentDataFromEntity<Translation>(true);
                if (!allTranslations.Exists(targetData.targetEntity))
                {
                    return;
                }

                Translation targetPos = allTranslations[targetData.targetEntity];
                float3 dirToTarget = targetPos.Value - pos.Value;
                moveData.direction = dirToTarget;

            }).Run();
    }
}

这里没有一个像游戏对象那样的“变换”，但我怀疑你在寻找LocalToWorld。沿着有一个位置属性，它还有旋转，向上，向前等。它包含一个矩阵，你可以用它乘以一个位置，然后转换成世界坐标。如果你想从世界到局部，在做乘法之前先求矩阵的逆。

LocalToWorld是世界变换。Translation和Rotation都是局部空间。

using Unity.Entities;
using Unity.Jobs;
using Unity.Mathematics;
using Unity.Transforms;

float3 point = new float3( 0 , 0 , 0 );
Entities
    .ForEach( ( in LocalToWorld transform ) =>
    {
        float dist = math.distance( point , transform.Position );
        if( dist<5 )
        {
            /* something happens */
        }
    } )
    .WithBurst().ScheduleParallel();