archived-dots

[rotund token]

(spherical smoothing? =D)

[robust scaffold]

nah, just a single radian. 2D is very nice.

All the examples online are for full quat smoothing and go way over my head.

There's slerp of course, but that's spherical lerping.

[rotund token]

just use cos/sin instead of linear?

[light badger]

there's math.slerp for quaternion smoothing

oh wait just saw you literally just wrote that

doesn't lerping a radian work well though?

[rotund token]

https://en.wikipedia.org/wiki/Slerp
slerp isn't tied to quaternions you can do it on n-dimensions

[robust scaffold]

them math though

function rLerp (A, B, w){
    let CS = (1-w)*Math.cos(A) + w*Math.cos(B);
    let SN = (1-w)*Math.sin(A) + w*Math.sin(B);
    return Math.atan2(SN,CS);
}``` I think this might work, but ugh, sin-cos.

[light badger]

for character interpolation I really just do this:
interpolatedRot = math.slerp(characterInterpolation.InterpolationFromTransform.rot, targetTransform.rot, NormalizedTimeAhead);

basically math.slerp(fromRot, toRot, ratio);

[robust scaffold]

Is this for the smoothing singleton?

I'm designing my own physics engine (again) from the ground up so i have nothing except my own systems touching the transforms.

Actually huh, making everything interpolated fixes the rotational vibrations. Something is going on predicted clientside that is messing everything up

Oh god damn it, im dumb. I had a WithAll<Kinematic, Interpolated> instead of WithAny<K, I>

[rotund token]

there is math.sincos method if you want to be efficient

[robust scaffold]

So my triggers to prevent interpolated overwriting wasn't being triggered.

[robust scaffold]

I got a vectorized sincos using polynomial estimation. The built in sincos is great for singular values but doesnt calculate it wide. But that's only alive within the physics loop and not available elsewhere. So I dont want to use it much.

[true mirage]

It does not work for float because of precision error 😅
I use it for int3 but for float3 handle in different way

[misty wedge]

Well yes, they are floats. The Equals override just checks the equality for each individual component

[true mirage]

It is weird why they compare float3 in this way

I always consider a threshold value when comparing them

[misty wedge]

This is the case for all floating point values, it would be weird if Unity.Mathematics Equals methods behaved differently

e.g. System.Single has the same "issue"

[robust scaffold]

Ya know, just on a different dev server, people were complaining how unity-engine's MathF float comparisons were on thresholds instead of exact bit comparisons.

[misty wedge]

^

[robust scaffold]

Thresholds also are more than 1 operation so may cost nanoseconds more than equality.

[true mirage]

I am convinced fully

[hushed lichen]

I do think that exact equality is the better standard implementation.
Let the dev themselves decide what the threshold should be by coding it themselves. It's an easy addition after all.

[true mirage]

Yes, agree

I check int2, int3, float2 and float3 can be serialized in the inspector, Cool

but int3 see

They are like int2

 public class WorldSetting : ScriptableObject
    {
        [SerializeField] private int3 aa;
        [SerializeField] private int3 cc;

[robust scaffold]

Expand the inspector to the left.

[rotund token]

wait it doesn't calculate wide?

it has double4/float4 overloads

[true mirage]

:/

[robust scaffold]

huh. No clue.

[robust scaffold]

a for loop with single float recording doesnt automatically expand to a float4 sincos calculation from what I can tell from the inspector. Just a bunch of vmovss and other scalar single operations.

[true mirage]

By the way, they can be serialized. So, I can use them in the inspector and serialize them using newtonsoft or JsonUtility without pain?

In debug mode, it is fixed

[hushed lichen]

Might be worth a bug report

[robust scaffold]

Using float4s results in this whole chunk of code. So there's a definite difference in vectorization.

[misty wedge]

It works for me

[true mirage]

Your version, please?

I need the latest patch, probably

[misty wedge]

Version of what, Unity?

[true mirage]

but does not matter

[true mirage]

yes

[misty wedge]

2022.2.0f1

[true mirage]

2021.3.6

[hushed lichen]

Might be a 2021 issue then

[light badger]

@rustic rain Found the fix to the standing-on-sphere rigidbody weirdness. If you replace the PhysicsUtilities file in Rival/Runtime with this, that should do it.

Keep in mind that if you want the standing-on-sphere to look believable (rotation of sphere incurs a displacement of the character), you would still have to add a TrackedTransformAuthoring to the sphere though.

I'll do some more serious testing this week and look into pushing an update with the fix soonish

[robust scaffold]

Wow, that was fast.

I have a bug somewhere in my physics code and i have 0 clue what is going on.

[balmy thistle]

What is going on?

[robust scaffold]

I got a sin-cos polynomial approximation and shoving the values back through a math.atan2() is returning a constant 3pi/2 for some reason.

[balmy thistle]

well that seems unlikely

[solid rock]

Are you using degrees or radians properly?

[balmy thistle]

let's see the code

[robust scaffold]

Here's the approx.

rot is the rotation buffer with values in radians. Sin and Cos are self explanatory

I have this immediately after, if the polynomials function property, this should produce the original rotational radians.

[balmy thistle]

how did you generate your coefficients?

also what are they

[robust scaffold]

https://en.wikipedia.org/wiki/Remez_algorithm

I'm using a remez approximation of sin from [-pi, pi) and cos from [-pi/2, 3pi/2)

private const float SinSecond = 7.9580617878616184e-3f;
private const float SinThird  = -0.16566698569427846f;
private const float SinFourth = 0.99927587074562368f;

private const float CosFirst  = 1.4507698749438392e-4f;
private const float CosSecond = -1.5952047934105319e-3f;
private const float CosThird  = -4.4083629793699222e-4f;
private const float CosFourth = 4.2822420811795007e-2f;
private const float CosFifth  = 2.2303232162043226e-4f;
private const float CosSixth  = -0.50138509243366806f;
private const float CosSeven  = 3.3850614694439052e-5f;
private const float CosEighth = 1.0002499365408113f;```

I'm gonna try running through regular sincos and seeing if it's a problem with atan.

It's not a problem with clamping because I run the rotation that doesnt go through the roundtrip through a sincos at renderer.

Okay, a round trip with sincos and atan2 is working properly so hrm

[balmy thistle]

Small tangent, did you write the Remez exchange yourself? I went through a similar exercise to generate a minmax polynomial approximation back in the day

[robust scaffold]

No, not that mathematically inclined (used to be back in the day, not anymore). I pulled it from a friend who crunched them.

[balmy thistle]

I mean, math.atan2 just called System.Math.Atan2 so it's just really not that exciting

[robust scaffold]

Yea, I'm gonna print the differences and see if it's just some period offset or something.

[balmy thistle]

Have you plotted the values for your approximation from -pi/2 to pi/2? Do they look feasible?

[robust scaffold]

Alright, the differences are not negligible but shouldn't be a problem.

[robust scaffold]

I did the classic abs(sin(x) - f(x)) chart and that's where I got the 0.00025 error from.

Cosine of course is a little (10x) worse due to the period shift but still close enough.

Values printed using this:csharp for (var i = 0; i < count; i++) { math.sincos(rot[i], out float tSin, out float tCos); Debug.Log($"S:{sin[i] - tSin} C:{cos[i] - tCos}"); }

[balmy thistle]

What's the code calling into atan2 look liek?

[robust scaffold]

I got a test rotation function as well rotating these boxes to show the round trip functioning. Using sincos() results in rotating boxes. Using this approx results in boxes that seem permanently rotated at 135 degrees.

[balmy thistle]

I mean, I don't see anything wrong in the pieces I'm seeing here

[robust scaffold]

Yea, which is where I'm at right now. Something isn't computing and it's something very minor.

[robust scaffold]

Reminds me so much of debugging shaders, complete black box because if I stick any debugs into this, it lags so hard.

So I'm just selectively setting various parts of this algo to output to rendering and seeing if it rotates

[robust scaffold]

private static void SinCosToRot([AssumeRange(1, int.MaxValue)] int count, [NoAlias] float* sin,
    [NoAlias] float* cos, [NoAlias] float* rot, [NoAlias] float* inv, float delta)
{
    for (var i = 0; i < count; i++)
        rot[i] += inv[i] * math.abs(cos[i]) * delta; //math.atan2(sin[i], cos[i]);
}``` Alright, this results in the boxes rotating in a frequency. Which means cos and sin (tested with sin as well) are properly calculating. Does Atan2 require normalized values?

[balmy thistle]

The coordinates should be on the unit circle

so yes

but if your values are approximately accurate than they should be

since sin(theta)^2 + cos(theta)^2 = 1

[robust scaffold]

Hrm, good point, let me try somethign

[robust scaffold]

private static void SinCosToRot([AssumeRange(1, int.MaxValue)] int count, [NoAlias] float* sin,
    [NoAlias] float* cos, [NoAlias] float* rot, [NoAlias] float* inv, float delta)
{
    for (var i = 0; i < count; i++)
        rot[i] += (cos[i] * cos[i] + sin[i] * sin[i]) * delta; //math.atan2(sin[i], cos[i]);
}```Results in nothing moving. Removing either cos or sin squared from the center does result in something moving. How is that possible? The only way the center value can equal zero (because delta isn't 0) is if either were an imaginary number.

Ah fuck, i just realized

There we go, the round trip works.

I was adding pi/2 to the radian angle when calculating cosine because I was thinking about using the sin approximation before my friend got back to me with the cosine approximation function. And I didnt remove the pi/2

So that meant I was calculating sine twice.

[nocturne dust]

Question, project tiny got forgotten and not updated anymore right? as in with unity 2022 ecs got out of hidding, so I remembered project tiny, anyone knows what state it is in? Or how compatible DOTS is with webgl.

[robust scaffold]

Yep, it's dead. 6 feet under. And it'll remain that way for the foreseeable future (1-2 years)

[rotund token]

Ha, I can see further into the future than that!

[brave field]

🥲 I guess official realizes that they can't do some many things in parallel. Their current focus should be improve what we have currently

[rustic rain]

I like the idea behind this behaviour though 😅

Would be curious to see what's causing it, because keeping such niche cases (which are not encountered in normal playthrough) encourages game's speedrunning

but for multiplayer - yeah, totally should be fixed

I see, just a small check

[noble hatch]

Hi guys. I just started with dots and trying to wrap my head around it. My first problem is that I can't seem to view the entities I'm spawning. Is there a way to enable gizmos in the entities hierarchy?

This is the prefab I'm spawning from

Scripts are super basic

    public class UnitSpawnerAuthoring : MonoBehaviour
    {
        public GameObject UnitPrefab;
    }

    public class UnitSpawnerBaker : Baker<UnitSpawnerAuthoring>
    {
        public override void Bake(UnitSpawnerAuthoring authoring)
        {
            AddComponent(new UnitSpawnerComponent { Prefab = GetEntity(authoring.UnitPrefab) });
        }
    }

    public partial class PlayerSpawnerSystem : SystemBase
    {
        protected override void OnUpdate()
        {
            EntityQuery query = EntityManager.CreateEntityQuery(typeof(UnitTag));
            int spawnAmount = 3000;
            var component = SystemAPI.GetSingleton<UnitSpawnerComponent>();
            if (query.CalculateEntityCount() < spawnAmount)
            {
                var entity = EntityManager.Instantiate(component.Prefab);
            }

            foreach ((TransformAspect transformAspect, UnitTag tag) in SystemAPI.Query<TransformAspect, UnitTag>())
            {
                transformAspect.WorldPosition = float3.zero;
            }
        }
    }

[noble hatch]

I also tried with just a cube

same result 😦

[deft ridge]

WeakAssetReferences doesn't seem to work in my case?

entity 1.0.0-pre.15

unity 2022.2.0b16

Child assets could not be loaded

[late mural]

i see 2022.2 is out of beta, does this mean that unity physics supports the new transform system?

[rustic rain]

have you installed Graphics package?

[noble hatch]

I'm using 2022 beta, isn't that in by default?

[rustic rain]

no

it's also preview package

btw, 2022.2 is out of beta

you can download 2022.2.0f1

it seems more stable than b16

[noble hatch]

I don't see it on the hub 😦

I have pre release packages enabled but I still can't see that graphics package anywhere

[rustic rain]

it's preview, so you need to enable preview packages

try

entities

in search

[noble hatch]

😄

I should get the new hub I guess

[noble hatch]

I mean I have the entities package

but graphics?

[rustic rain]

it has entities in it's package name

so you should find it with entities keyword

[noble hatch]

I'll install the new hub and new unit version

maybe it will solve my problem 😄

[rustic rain]

oh yeah

[noble hatch]

man what 😄

[rustic rain]

you won't see it on beta

I forgot

[noble hatch]

is it because it's not available or because it's already included? 😄

[rustic rain]

it's only visible on beta

I mean

release

damn

on beta it's not visible

and you need url to install

[noble hatch]

alright installing 2022.2.0f1

will see

😄

[deft ridge]

:>

[deft ridge]

WeakAssetReferences is fine. after upgrade to 2020.2.0f1

😂

[noble hatch]

WAIT are entities not visible in scene window?!

[rotund token]

they are

check your preferences, entities, (cant remember what its called exactly) scene view baking type

should be either authoring or runtime

[noble hatch]

that was it, thank you

[noble hatch]

I was reading about the Hybrid Link - is it not in the new graphics package?

[rustic rain]

Hybrid is not about graphics at all

it's just attaching GameObject to specific entity

in order to use classic components that don't have entities alternative (skin mesh)

[noble hatch]

I see, just found a video that talks about it. https://www.youtube.com/watch?v=vs6h4waQpPA&list=PL6ubahbodJ3N2udo4n9yGQcpbWnqdgYnL&index=9

So if I wanted to have 10k animated objects, they'd still need individual gameobjects with animators on them, is that right? Assuming I didn't go for a custom solution.

[rustic rain]

yep

[noble hatch]

ooof. Performance won't be what I hoped 😄

[rustic rain]

That's still going to be faster, because everything else is

besides

animator has built in culling

which can be also done with help of ecs (disabling game object if it's culled)

[muted star]

You could try Latios Kinemation/ DMotion or GPUI Crowds Animator asset for animation if you need better performance.

Hi everyone, in editor play mode my game is running fine but in the build I get these errors. Any ideas what could be going wrong?

In the editor play mode I get these warnings, but there are no missing scripts as far as I can tell

[noble hatch]

I have an asset that I'm quite happy with so it will help I'm sure 🙂

[muted star]

what are you using for animation?

[noble hatch]

https://assetstore.unity.com/packages/tools/animation/mesh-animator-animate-massive-crowds-26009

[muted star]

Thread

[blissful bobcat]

Hey guys how to solve this on latest unity 2022.2.0f1? Found a forum thread about it but didnt underestand well the solution

[oblique cosmos]

Suppose I had a simple LookAt type System that takes in a ComponentLookup<LocalTransform> to make a thing face an other thing. I finally realized that this means I'm in trouble when I wanna look at some child object somewhere, because I don't appear to have a way to actually get its world position at all (since I don't see a way to get access to the parent, let alone possibly multiple parents). Is there a decent solution to this or should I use a ComponentLookup with WorldTransforms instead? Or... in addition? This already feels pretty brute force to me, surely there's a smarter way of doing this?

[edgy fulcrum]

@oblique cosmos it seems like you need Aspects and https://docs.unity3d.com/Packages/com.unity.entities@1.0/api/Unity.Transforms.TransformAspect.html might help your case

https://docs.unity3d.com/Packages/com.unity.entities@1.0/manual/transform-aspect.html

[oblique cosmos]

Can't put those into a ComponentLookup though, can I?

I don't see how this helps my problem?!

I mean, I see how the TransformAspect would solve my problem, but I don't see a way to actually get access to them outside of a job query? Which I can't use because the target is not what I want to iterate over

[edgy fulcrum]

yeah I see your problem, there's no equivalent aspect builder from componentlookups

thats why they added aspects, its not complete yet but at least it will simplify managing a group of components (transforms) together as a single collection of stuff to compute against

[oblique cosmos]

Yea, I know, I'm already using a bunch and love them, but I'm not really seeing how I'd get access to them in this situation

[edgy fulcrum]

there will be a GetAspectLookup() in future versions hah

[oblique cosmos]

Yup, know about that, too :D

Unfortunately future != now :P

[edgy fulcrum]

what I mean is you can just get the components, then build the TransformAspect out of it, then grab the position

so that way you don't redo the computation on your side regarding child positions etc

[oblique cosmos]

Oh? Hm. Was wondering what this AspectBuilder or whatever was all about 🤔

[edgy fulcrum]

exactly, it's a hack for now I think

[oblique cosmos]

Any documentation on how to go about that?

[edgy fulcrum]

not much, you can look at the public git repos for any code that uses IAspect and start browsing 😉

[oblique cosmos]

Ouf. The documentation crawl on this stuff is pretty real lol

[edgy fulcrum]

yeah aspects and enableable components are the newest craziest stuff in entities 1.0

I'm not a pro on those features yet and still retooling my old 0.50 codebase so I can't give you concrete examples yet 😦

[oblique cosmos]

Yea, I'm deep into noob territory still myself, but I'm slowly piecing it together! But if you say there's a way to get some sweet aspects into my job, I'll go look into that, thanks. That would actually solve a good chunk of my recent headaches, cause aspects are amazing.

[edgy fulcrum]

yeah for now I'm simply sticking with my good ol LocalToWorld based code where I do everything myself 😦

[oblique cosmos]

I had the good fortune to really start digging into it like a week before the whole 1.0 thing happened, so I got a light overview on 0.5 and then immediately moved on. Well... good and bad things about that, but at least I don't need to convert a million scripts :)

[trail valve]

Hi guys, I'm using Unity Physic v1.0.0 pre.15, but I wonder how can I detect collision enter or exit event?

[edgy fulcrum]

@trail valve https://docs.unity3d.com/Packages/com.unity.physics@1.0/manual/simulation-results.html#events

[trail valve]

I already used ITriggerEventsJob, but I just want to detect on trigger enter or exist like OnTriggerEnter of GameObject

Is those event exist in DOTS Physic?

[pliant pike]

Yeah they do, I don't know if it's different in 1.0, but there was an example in the physics samples

I can't find the example now but it involves a statefultriggereventbuffer, which you add to the object you want to trigger

[true mirage]

Can't I have NativeHashMap<int,Chunk>, right?
Chunk is struct containing NativeArray<Voxel>

[rustic rain]

YOu can

but safety system might not work properly

[true mirage]

I get exception

ArgumentException: Chunk used in native collection is not blittable, not primitive, or contains a type tagged as NativeContainer

[rustic rain]

what version are you on?

[true mirage]

2021.3

public struct Chunk
    {
        private readonly int _chunkSize;
        public int3 Index { get; }
        public float3 RealPosition { get; }
        
        private NativeArray<Voxel> _voxels;

        public Chunk(int3 index, Voxel[] voxels, int chunkSize, float3 realPosition)
        {
            _voxels = new NativeArray<Voxel>(voxels, Allocator.Persistent);
            Index = index;
            _chunkSize = chunkSize;
            RealPosition = realPosition;
        }

 public struct VoxelWorldData
    {
        private readonly int _worldSize;
        private readonly int _chunkSize;
        private readonly int _worldLength;

        public NativeHashMap<int, Chunk> Chunks;
        public NativeArray<FirstDownwardBlockedVoxel> FirstDownwardBlockedVoxels;

        public VoxelWorldData(int worldSize, int chunkSize)
        {
            _worldSize = worldSize;
            _chunkSize = chunkSize;
            _worldLength = _worldSize * _chunkSize;
            Chunks = new NativeHashMap<int, Chunk>(worldSize * worldSize * worldSize, Allocator.Persistent);
            FirstDownwardBlockedVoxels = new NativeArray<FirstDownwardBlockedVoxel>
            (
                _worldLength * _worldLength * _worldLength,
                Allocator.Persistent
            );
        }

[rustic rain]

not a thing in 0.51

only 1.0 got rid of managed safety data in native containers

[true mirage]

Any solution? :/

[rustic rain]

update to 1.0

😅

[true mirage]

Also, if some data inside structs here Chunk have the same value, should I define them as static fields or get values outside StaticValues.ValueA?
Here, chunkSize and worldSize values are the same for chunks

[viral sonnet]

huh, i haven't really figured this out. (looking at rival source)

coming from public readonly DynamicBuffer<KinematicVelocityProjectionHit> VelocityProjectionHits;

[robust scaffold]

A DB's only 16 bytes anyways so copies are probably fine.

[viral sonnet]

sure, but it's more about why in parameters are triggering this on readonly

[robust scaffold]

What is processor?

[viral sonnet]

some struct that has IKinematicCharacterProcessor. it's from the rival source code. not mine

[rotund token]

Ah impure, my biggest last peeve atm

[viral sonnet]

i had this in my source code too. i rewrote it but never figured it out why a copy is suddenly happening. i mean it's great that rider is warning us

rival has pretty great source code i must say. worth a read btw

[rotund token]

Have these all throughout project and annoys hell out of me

[signal phoenix]

That's a possibly controversial decision on my part; there are places where I pass collections by "in" or "ref" based on whether or not the contents are expected to be modified by the function. Sometimes it's helpful to know. But i would 100% understand arguing against this too

So a copy would also be totally fine in this case, and "in" doesn't really matter

Never noticed that message before though. I should look into it

[rotund token]

Method(in DynamicBuffer<Key> keys)

foreach(var key in keys.AsArray())

Killing me

[true mirage]

How can I set a part of a native array? I see GetSubArray but not SetSubArray

Also, copyto and copyfrom do not have start index and length

[rotund token]

Get sub array is the easiest answer

Just do that then call copy methods on it

[true mirage]

yes, easy but efficient?

[oblique cosmos]

Anyone else got any ideas on this? I'm still stuck :<

[mystic mountain]

Is there a way to get all client + thin clients worlds from managed side?

[signal phoenix]

With a ComponentLookup<LocalToWorld>, you can get the world position of the entity you want to look at. It also has the advantage of being the interpolated transform, if the thing you're looking at is a rigidbody. But the caveat is that LocalToWorld is only updated during TransformSystemGroup, so depending on when your LookAt system needs to be in the frame, you might be looking at last frame's data

[oblique cosmos]

Darn it, it was recommended to me, in this very Discord, to use LocalTransform lol

Gonna look into that, thanks

[signal phoenix]

I'd say iterate on all worlds (World.All I think), and check each world for .IsClient or .IsThinClient

[rotund token]

hard to be more efficient then a memcpy (which copy methods do)

[robust scaffold]

DynamicBuffer.GetUnsafeReadOnlyPointer() And the warnings. pain.

[oblique cosmos]

Hm. Okay, I've just realized that my example was very poor because it excluded some relevant details. Rather than thinking of just a LookAt system, let's call it a turret with two axes. I use the ComponentLookup both for those axes (which are children of my primary entity) as well as the target. As such, I need access to the local transforms of those axes (for some math and transformations) as well as the world position of the target. So it would seem that LocalToWorld doesn't really fit the bill, either :( Any way to get access to both of those without having a second Lookup just for the target? I'm not familiar enough with the inner workings to say but... that doesn't strike me as very conducive to performance, right?

[solid rock]

Ok the job system definitely has to be some black magic fuckery. I had a process which took around 200ms in managed code. Merely jobified it (and parallelized what I could of course) and I can't even find it in the profiler anymore. After some digging... 0.35 ms for the whole thing.

[signal phoenix]

I use the ComponentLookup both for those axes (which are children of my primary entity)
I'd say in that case you'll probably need the two lookups: LocalTransform and LocalToWorld.

unless you wanna split your turret lookat into multiple systems, where one handles horizontal aim and another handles vertical aim, but that just sounds like overkill

[oblique cosmos]

Yea, it's also a lot more complicated than that, I'm afraid. I have a few features in there that require both axes to be able to talk to each other and splitting them would probably just make everything worse 🤔 Well, in principle I don't particularly care about having two Lookups, as it doesn't really impact me a lot on the code side of things. How's, generally speaking, the performance consideration on all this? Seems to me asking for every transform ever is a bit rough, no?

[signal phoenix]

Getting a ComponentLookup<Something> costs almost nothing, especially if you get it via SystemAPI.GetComponentLookup. Getting a component on an entity via that lookup is only a bit more expensive than accessing a reference

[oblique cosmos]

Wait, really? I feel like I've been told/read that there's random memory access stuff happening and it's generally not good (but unavoidable at times, obviously)?!

[signal phoenix]

it's certainly a lot less fast than linear memory access by iterating components in chunks, but it's also quite near the speed you'd get if you implemented something in OOP. So better avoid it when you can, but if you can't avoid it, it really isn't the end of the world

[robust scaffold]

I mean it's not good but it's not bad.

Ideally, you develop data and access patterns to avoid random access but in some cases it's unavoidable.

[oblique cosmos]

Yea, I've been trying fairly hard to avoid doing this, hence my entire issue. But I assume these costs are linear, in that it's a sort of flat fee I'm paying and it's not invalidating all the fast math and stuff I'm even using DOTS for in the first place, yea?

My memory access lore is a bit rusty...

[robust scaffold]

First code the mechanic, then optimize it later. ECS is really nice in that the comparatively modular and independent nature of every aspect of coding allows for relatively painless refactoring and optimization.

[rustic rain]

reading 1 component is nothing

[oblique cosmos]

Certainly, that's a good thing to live by. I'm just trying to figure out the correct ways from the get go, rather than learning wrong and trying to unlearn later :P

[rustic rain]

using lookup to iterate thousand of objects - bad idea

[robust scaffold]

Pain.

[rustic rain]

jeez

what's this

[hushed lichen]

ptrs lol

[robust scaffold]

Collision resolution. Every single component of all entities for physics.

[rustic rain]

🥴

[robust scaffold]

And the random access is killer. It aint good.

[oblique cosmos]

That's kinda what I mean with my fairly poor phrasing, since I'm just iterating over my actual components the fee I'm paying here should be flat, yea? As in, the more entities I have the smaller the relative impact, since the lookup cost goes up linearly at worst?

[robust scaffold]

If you lookup one or three components per entity, that's fine. It's when you start doing O(N^2) operations that are really bad.

[rustic rain]

lookup is using entity index to find chunk and then chunk's internal map to obtain ptr to correct data

just so you have idea how much it costs

[oblique cosmos]

Soooo... just so I understand this correctly, when I'm using a Lookup, is that stuff only pulled from memory once I provide an Entity ID?

Or does it read the entire thing first?

[rustic rain]

var chunk = chunks[entityIndex];
var ptr = chunk.GetRWPtr<T>(entity);
smth like that

[robust scaffold]

Lookup is just a dictionary. With costs similar to it.

When you get a reference to a dictionary, does it pull the entire dictionary with it? Same think with entity component lookup.

[oblique cosmos]

Hm. Yea, I figured as much, I guess I'm tripping up on the memory aspect of it. Because from what the code reads it feels like it pulls every transform in existence from RAM and that sounds bad?

[oblique cosmos]

I have no idea! I'm a C# script kiddy, I don't know these things lol

[robust scaffold]

Oh boy, well I mean that's good. People experienced with C# and OOS coding have a real hard time learning ECS/DOTS.

[rustic rain]

nah, it just uses 2 random memory accesses out of heap

[oblique cosmos]

I see. Mhhh, starting to make sense. In that case, it really doesn't seem like that big of a deal 🤔

[robust scaffold]

Yea, dont worry about it. Optimize when you're more experienced with DOTS.

[edgy fulcrum]

@oblique cosmos yeah it takes a while to unlearn all of your "bad" OOP practices 😉

[oblique cosmos]

Oh, I will. I'm not even really building anything particularly useful right now, just trying to wrap my head around things. And poking around with some optimizations seems like a reasonable approach to such things

[oblique cosmos]

To be fair, Unity already punched a lot of good practices out of me lol

Properties who? Interfaces what?

[hushed lichen]

Haha, relatable

[robust scaffold]

Properties are actually pretty nice.

[viral sonnet]

How much time does it take to read this part in memory is one of the most advanced questions because nobody can really answer it except the machine while it is being profiled. Sometimes random access hardly matters, then it trashes performance. Usually it doesn't though but in very hot code paths it can lead to stalls. Best is to write the code and profile it. Theory crafting is very useless here.

[oblique cosmos]

I agree! Unity's standards aren't... particularly fond of them though, it seems :P

[robust scaffold]

And it's the only way to debug blob asset values

[oblique cosmos]

I understand that, I'm not looking for numbers, just a general feeling of "will this blow everything up".

[hushed lichen]

Wait, that's an attribute? Huh... learn something new every day

[robust scaffold]

My best answer to that is coding it yourself and seeing if it does blow up. Trial and error is pretty much the only way to know as coding, in my experience, is largely instinctual rather than intellectual.

[viral sonnet]

You can also write an Inspector but your version seems more convenient.

[robust scaffold]

Yea, it allows properties to show up on the editor inspector. I have this entire block surrounded with a #if UNITY_EDITOR

[viral sonnet]

Even that is subjective. It won't blow up with 50 entities or 100, so what will you throw at it? 🙂

[oblique cosmos]

Oh, trust me, there has been plenty of error :D

[robust scaffold]

Writing inspectors are pain. As someone who wrote my own entity inspector.

[hushed lichen]

Test your use case, see how it behaves, test again later when use case changes, repeat.

[oblique cosmos]

Well, you know, I'm just saying. If I start sorting via some n^3 nonsense, maybe someone should tell me to stop, is all :)

Anyway, guys, it's getting towards bed time over here in the mythical land of Germany. Thanks everyone for holding my hand. You guys keep talking about blob assets and all the other stuff I haven't looked into yet!

[hushed lichen]

I'm just north of you buddy 🙂 But sleep well

[edgy fulcrum]

nitey nite buddy!

[mystic mountain]

Is SystemAPI not supported outside of systems?

[viral sonnet]

no

[mystic mountain]

Is there another way to get singleton component outside of system? 😅

[viral sonnet]

sure ```public static TComponent GetSystemSingleton<TSystem, TComponent>(this EntityManager entityManager)
where TComponent : unmanaged, IComponentData
where TSystem : unmanaged, ISystem
{
var systemHandle = entityManager.WorldUnmanaged.GetExistingUnmanagedSystem<TSystem>();
return entityManager.GetComponentData<TComponent>(systemHandle);
}

    public static TComponent GetSystemSingletonManaged<TSystem, TComponent>(this EntityManager entityManager)
        where TComponent : unmanaged, IComponentData
        where TSystem : ComponentSystemBase
    {
        var systemHandle = entityManager.World.GetExistingSystem<TSystem>();
        return entityManager.GetComponentData<TComponent>(systemHandle);
    }```

            where T : unmanaged
        {
            var query = entityManager.CreateEntityQuery(ComponentType.ReadOnly<T>());

            var entity = query.GetSingletonEntity();
            query.Dispose();

            return entity;
        }
        
        public static T GetSingleton<T>(this EntityManager entityManager)
            where T : unmanaged, IComponentData
        {
            var query = entityManager.CreateEntityQuery(ComponentType.ReadOnly<T>());
            
            var entity = query.GetSingletonEntity();
            var comp = entityManager.GetComponentData<T>(entity);
            query.Dispose();
            
            return comp;
        }```

[solid rock]

I want an IJobParallelFor which returns true if any of the parallel executions return true, and false if none of them do. The first way I thought of doing this was using a NativeArray<bool> for output and iterating over the result in managed code, but I was wondering if there's a better way.

For example is there some kind of AtomicInteger I can increment in parallel and then just check if it's nonzero on the managed side? Or any other better suggestions?

Even cooler would be if there was some way to early exit all the threads if one of them returns true early.

[viral sonnet]

NativeReference<int> should be atomic. There's a NativeCounter in the entities guide which basically implement 128 integers that are incremented in each thread.

[solid rock]

Is that what you are referring to? https://docs.unity3d.com/Packages/com.unity.collections@2.1/manual/jobs-custom-types.html#custom-nativecontainers

[viral sonnet]

yes

[solid rock]

Sweet thanks

[robust scaffold]

Setting a int or bool is atomic / no race condition if the value you set it as is constant.

[solid rock]

Setting it, but not incrementing right?

Since increment is a read-then-set

But I suppose in my case I can get away with it because I only care about any being true not how many, right?

[robust scaffold]

Yea, that's the only reason why it's safe. Just set it if the condition is true but dont do anything if false.

[solid rock]

Sounds good thanks

[viral sonnet]

can you make the same thing happen with CalculateEntityQueryCount?

[solid rock]

Maybe, if I were using Entities 😉

[mystic mountain]

Is the conversion system fully removed now?

[robust scaffold]

GameObjectConversionSystem? Yes. It's gone with 1.0

[solid rock]

Also maybe a dumb question but can I use using statements and/or try/finally inside of a job? This is just to make sure I properly Dispose any native collections I create inside the job.

[robust scaffold]

Yea, using works inside jobs and burst.

[solid rock]

excellent

[robust scaffold]

Behold my skyscraper of a job.

[viral sonnet]

finally - no. i'm not sure with try/catch. i think it works. disposing in a final context is a bit odd.

[hushed lichen]

holy christ, what situation would you even need all of that info? Where it doesn't make more sense to split it up somehow

[viral sonnet]

a split would accomplish very little. you could criticise for not putting all that in structs but he has his reasons.

[robust scaffold]

It's the entire physics simulation in one single threaded job.

[robust scaffold]

All of these NAs are created just before this.

[hushed lichen]

Yeah OK, makes sense then

I mean, the Unity Physics converts all the ECS runtime data to physics data, does a bunch of broad phase detection to order the data so they can multithread the collisions proper.
Admittedly a fair bit more involved than what you're doing but, yeah.

it helps having had lectures with Sean Parkinson, the Unity Physics lead and having him explain a bunch of the entire pipeline

[robust scaffold]

Yea, I've dug through the source of it. Physics is great but it has so much wasted memory.

[solid rock]

I almost did exactly that and then thought about how the Job is a struct

[robust scaffold]

You can do that. What do you think native arrays are.

[hushed lichen]

I do not have the time or experience to go digging through it and properly comprehend memory footprint etc 😅

[robust scaffold]

You can have a struct of native arrays as a field of a job struct to reduce the size of the job scheduling and not have the skyscraper.

[robust scaffold]

It's just chunk size. And the required local to world and world transform matrixes.

[true mirage]

public unsafe NativeArray<T> GetSubArray(int start, int length)
    {
      this.CheckGetSubArrayArguments(start, length);
      NativeArray<T> nativeArray = NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray<T>((void*) ((IntPtr) this.m_Buffer + (IntPtr) ((long) UnsafeUtility.SizeOf<T>() * (long) start)), length, Allocator.None);
      NativeArrayUnsafeUtility.SetAtomicSafetyHandle<T>(ref nativeArray, this.m_Safety);
      nativeArray.m_DisposeSentinel = (DisposeSentinel) null;
      return nativeArray;
    }

So, GetSubArray does not create a new allocation, right? only a view

[rotund token]

correct

if you write to sub array you will write to original array

if you want a copy do GetSubArray(x,y).ToNativeArray(allocator)

[edgy fulcrum]

@true mirage if possible it's better to work with Spans as it's more explicit but yeah it's the same thing 😉

[true mirage]

Thanks. No, I want views

I keep all voxels in one NativeArray eventually. I mean I change my design from NativeHashMap<int, NativeArray> to NativeArray

[edgy fulcrum]

@solid rock you could simply use Interlocked operations on a NativeArray<int>(1) and I use that to great effect to sum up how many entities triggered condition X in jobs

[true mirage]

but I would like to slice them as chunks and send each chunk to somewhere else

[edgy fulcrum]

@true mirage so you want copies? or just read-only slices of the original array?

[true mirage]

No, I don't want copies

only instead of sending the entire native array, slice it and send only that slice

Maybe, it is a silly way

[edgy fulcrum]

then GetSubArray() or ToSpan() does exactly that

[true mirage]

but working with that slice is easier in terms of indices, etc.

[edgy fulcrum]

basically it creates a new nativearray which aliases the original

agreed, it's easier to focus on slices instead of juggling indices etc hah

[true mirage]

Yes, because sometimes I want to work with only that specific chunk.
World-> Chunks->Voxels

[edgy fulcrum]

so you have a NativeList<Voxel> which contains all voxels, then you want to slice it up and send it to a job to only process that slice without knowing about the entire list?

[true mirage]

sorry another question. In struct types, we cannot define ref types for jobs, OK but can have some methods to return array of value types, correct?

[edgy fulcrum]

so simply list.ToArray().GetSubArray(myIdx, voxelLength) will give you a NativeArray which you can pass to jobs, and don't have to worry about disposing

[true mirage]

Exactly

[edgy fulcrum]

you want a job to return something? just stuff it in an result array and read it on job completion

[true mirage]

For example, to create a chunk, update a chunk, finding a path on a chunk

[true mirage]

Forget it. It was another irrelated question

[edgy fulcrum]

that makes total sense - you just have to trust that C#/Burst/DOTS/Jobs/Unity is doing the right thing and start using array slices more 😉

[true mirage]

I converted my entire project from Vector3, Vector3Int to math types, also some part of it to job system. It was time consuming at least for me 😭
Appreciated

[edgy fulcrum]

generateBarycentric(ref myVerts, in masterIndices);
private static void generateBarycentric(ref NativeArray<vertexData> verts, in NativeArray<int> tris) {
  // update the vert array here
}

nodeVertices is a list of verticeData structs, I slice it up into SubArray then pass it to another static function which operates on the entire nativearray without realizing that it's a slice

[true mirage]

Wow, afterwards, I should convert many value type arguments to ref and in to optimize them😭

a lot of work

[edgy fulcrum]

yeah yeah updating to 1.0 was also a lot of work but definitely worth it!

from now on I'll be coding purely unmanaged stuff 🙂

[true mirage]

ref and in are messy in my eyes :/ but cannot trust AggressiveInlining for private simple methods with value type arguments

[edgy fulcrum]

hah not that messy compared to the alternative: not trusting the compiler 😉

it was fun learning how powerful C# really is with this DOTS project

before I would have to resort to C++ code to achieve what I wanted

now I can just whip up some burstified jobs and call it a day!

[true mirage]

Yes, when I see elapsed times for my routines and boost it 10-100 times I will be happy and refreshed

[viral sonnet]

where are you stuck? you can already de/serialize structs which can be IComps

unity json or newtonsoft one will work

[balmy thistle]

I haven't done it with IComponentData specifically but I've used a ddl based approach before to generate serialization wrappers for json

[robust scaffold]

I mean, isn't that just a subscene?

[robust scaffold]

Oh, I don't know what a timeline is. Sorry.

[gusty comet]

Does anyone know of:
A. Someone already developing a solution for using baked animation data in combination with vertex shaders on mesh renderers instead of skinned mesh renderers in URP, or
B. Any reason why that wouldn't be feasible for entities?

[turbid dawn]

Hello ^^
We are working on an exam project with DOTS and we are having difficulty reseting the scene we are doing this right now:

DefaultWorldInitialization.Initialize("Default World", false);
SceneManager.LoadScene("DOTS Tornado", LoadSceneMode.Single);
World.GetExistingSystem<TornadoSystem>().Enabled = false;
World.GetExistingSystem<ParticleSystem>().Enabled = false;
World.GetExistingSystem<ConstructionSystem>().Enabled = false;
World.GetExistingSystem<BuildingSystem>().Enabled = false;
World.GetExistingSystem<UpdateCameraSystem>().Enabled = false;

In addition, Is there a way to maybe reset only the subscene?

[rotund token]

In addition, Is there a way to maybe reset only the subscene?
just close and open it again

[rustic rain]

yeah, just call SceneSystem.Unload(subscene)

[turbid dawn]

Thank you we will try that ^^

[calm edge]

Is using singleton entities the standard of configuring systems, and is it something I can set up in 0.51 that will migrate to 1.0 easily?

[edgy fulcrum]

@calm edge singletons is the preferred way to access ISystem-based systems (not SystemBase) so if you are planning to have many ISystems it's a good time to reconfigure

[calm edge]

what is preferred for SystemBase then?

[edgy fulcrum]

for me, I just store references to the managed systems (system A stores ref to system B) via World.GetExistingSystemManaged()

[signal phoenix]

I tend to use the Singleton approach for SystemBase as well. An advantage of singleton as opposed to storing stuff in the system is that singletons know how to deal with dependencies

[calm edge]

Other options like ScriptableObjects seem to have a number of issues

[rustic rain]

singleton entities is a good way to store data per world

otherwise you can use static fields

or I have a singleton struct implementation if you don't want to store data on entities

[frigid crypt]

Is there anything specific I have to do to make trigger event work correctly?

Because for some reason they don't want to work for me

[hushed lichen]

What version of entities?

[frigid crypt]

1.0

But I think I figured out the issue

Which lead me to another problem

How can I check in ITriggerEventsJob if an entity has certain tag?

Because it seems tags don't work with ComponentLookup

[rotund token]

They should be fine but you can't get it since there is nothing to get

Has check should be fine though

[frigid crypt]

Well, it isn't fine for me

    public partial struct HandleTriggerEvent : ITriggerEventsJob
    {
        public ComponentLookup<PickUpData> pickUpData;
        public ComponentLookup<PickUpTriggerTag> pickUpTriggerTag;
        public NativeReference<int> test;
        public void Execute(TriggerEvent triggerEvent)
        {
            test.Value++;
            Entity entityA = triggerEvent.EntityA;
            Entity entityB = triggerEvent.EntityB;

            bool isEntityAPickUp = pickUpData.HasComponent(entityA);
            bool isEntityBPickUp = pickUpData.HasComponent(entityB);

            bool isEntityAPickUpTrigger = pickUpTriggerTag.HasComponent(entityA);
            bool isEntityBPickUpTrigger = pickUpTriggerTag.HasComponent(entityB);

            if(isEntityAPickUp && isEntityBPickUpTrigger)
            {
                var temp = pickUpData[entityA];
                if (!temp.following)
                {
                    temp.following = true;
                    pickUpData[entityA] = temp;
                }
            }

            else if (isEntityBPickUp && isEntityAPickUpTrigger)
            {
                var temp = pickUpData[entityB];
                if (!temp.following)
                {
                    temp.following = true;
                    pickUpData[entityB] = temp;
                }
            }
        }
    }

As it is the code inside if statements doesn't execute but if I remove isEntityAPickUpTrigger and isEntityBPickUpTrigger from them then they start working

[rotund token]

well i would say that is probably because they won't have the component

[frigid crypt]

I double checked that it has though

[hushed lichen]

You know for sure that it's the tag causing issues? Because so far we only have your word for that 🙂 I don't see the PickupData component in the preview too

[frigid crypt]

Like I said, if I only check for PickUpData, if statements work as expected

[hushed lichen]

Ah, missed that part.
Weird

[frigid crypt]

So, at least to me, it looks like it's a problem with the tag

Well, I guess that at least for now I can just set the "Collides with" property more carefully for triggers

[remote crater]

I have: queryALL = GetEntityQuery(ComponentType.ReadOnly<EntityData>()); //But I want to restrict not getting ones back that have AttractorData()
I tried: queryALL = GetEntityQuery(ComponentType.ReadOnly<EntityData>(), !ComponentType.ReadOnly<AttractorData>());

I can't see the negative parameters to a query in the official Unity docs: https://docs.unity3d.com/Packages/com.unity.entities@0.0/manual/component_group.html

[rotund token]

ComponentType.Exclude<AttractorData>()

[remote crater]

Thank you inumberable tertle, I want to make bank so you can get a house that you can take with you on the road.

[rotund token]

Personally I prefer my houses to be unmovable

Except maybe a catamaran 🤔

[remote crater]

No Winnebego?

I thought if you .foreach(bleh){ }).Run();
ecbs.AddJobHandleForProducer(this.Dependency);

That things you change in the EntityCommandBuffer are changed by the next cycle run of the script

I'm setting a flag [Flag_Destroy] and [Disabled], but they don't propagate til a few script cycles later

This leads to items being picked up multiple times instead of once

[proud jackal]

What's meant by next cycle?

The ECB will run as soon as your ECBSystem is run, so in your case ecbs.
Remember to order your recording systems in the order you expect it. So e.g. writing to an ECB in the SimulationGroup where the ECB system used is BeginSimEcb that will end up running next frame because you recorded it in one frame but the system won't run until next frame

[edgy fulcrum]

@remote crater if you want, it's possible to rearchitect your flags to be enableable components so you dont have to use commandbuffers and all the pitfalls that come with them 😉

[gusty comet]

I just returned to find out that dots finally has actual proper 2d support!

[viral sonnet]

2022.2 is in a weird state right now. unofficial f1, beta is at b16 since 18.Nov.

hm, ok seems 2022.2 f1 is at least official since 7.Dec

[gusty comet]

I was about to say that is how I stumbled upon it

because I watched a recap of the changes in 2022.2 f1

which mentioned it rather nonchalantly but for me that is a huge deal

[viral sonnet]

hm, the official f1 certainly has a different hash than the pre-release f1 1c1f8590be28.

it's very unstable so I had hopes we'd see a new version today

[slim nebula]

is unity.platforms.windows still the preferred build method for dots stuff? I"m having trouble upgrading my old ass project to 2020.3 as a first step. Should I be using something else?

I do plan to update to latest tho. just doing 2020.3 as a first step.

[covert lagoon]

2022.2.0f1 is unstable?

[rotund token]

In version earlier than 1.0 yes
In 1.0 no

[slim nebula]

ok I"ll just remove it for now then and do the new 1.0 stuff once I upgrade there. can you direct me to the right name or resource so I ccan look into it?

[gusty comet]

Ok I am already running into an issue again. I just did a clean install of Unity and the Unity hub, as well as a clean install of 2022.2.0f1. I created a 2D URP project and installed the entities packages as well as entities graphics and got a bunch of errors. I did the usual aka re starting the editor where it halts and gives me a warning. If I ignore it I get this in the console Library\PackageCache\com.unity.2d.animation@9.0.1\Runtime\TransformAccessJob.cs(165,62): error CS1955: Non-invocable member 'NativeHashMap<int, TransformAccessJob.TransformData>.Count' cannot be used like a method.

[rotund token]

In 1.0 you just build normally

[slim nebula]

oh

well isn't that nice

thanks 😄

[rotund token]

Seems like the 2d animation package is out of date

If there's no update available you just need to wait I guess

[gusty comet]

2d animation package installed is 9.0.1 and seems to be up to date?

Wait so they pushed something out that is literally unusable?

I do not need 2d animation but because of the whole "features" bullshit I can not disable it facepalms

[viral sonnet]

where did you have the info about 2d support?

[gusty comet]

oh wait I am semi confused now

[gusty comet]

It literally has packages for 2d sprites, and 2d physics

[viral sonnet]

aren't those for regular GOs?

[solemn hollow]

you can easily fix it yourself. its 3 lines of code you need to update.

[gusty comet]

I might give it a try if everything else fails. I just uninstalled the 2d features packages and am re installing it in hopes it picks up something

[solemn hollow]

why u need the 2D features package? its for gameobjects

i do spawn in gameobjects that are synced with entity positions to use animation 2D package. if you can avoid it i would

[gusty comet]

Because I only use dots for specific performance critical things

At least that was the idea unless the workflow has drastically improved since the .50 days

Also the 2D package has things like the sprite renderer component

which you still need

regardless if you use dots or not

[solemn hollow]

animation 2D does not contain the spriterenderer 0.o

[gusty comet]

again... unity does not allow you to install those seperately anmyore if they are part of a feature

at least I could not get it to work.

[solemn hollow]

part of a feature?

[rotund token]

Just don't install the feature pack, install the packages individually

Features are just a collection of packages

[solemn hollow]

oh ive never seen those feature packs lol

[gusty comet]

I am aware but it does not let me. As soon as I install a package from a feature it always installs the whole feature without giving me means to intervene.

That is my whole damn issue

[solemn hollow]

just to show its possible for me

[gusty comet]

Hmm something is really borked here.

Well I do a complete clean install AGAIN maybe its something residual since it should be possible.

[solemn hollow]

maybe just try getting rid of the package in the manifest file

[gusty comet]

If I just delete the manifest file it would rebuild anyway no?

Would be the faster way if that is the case

[solemn hollow]

i dont think it would rebuild. you would be missing all/most packages then

im not sure if unity recovers anything from the package cache if it cant find a manifest

just delete the package from the manifest you want to get rid of

[gusty comet]

I am going to try that, and thanks for your patience by the way.

[solemn hollow]

@rotund token btw i have not forgotten about our conversation regarding systems using components they dont know about. looking forward to your ideas if you ever find the time. atm i am recreating the whole UI code for the AI to make it actually useable for you ^^

[gusty comet]

Ok deleting it from the manifest actually worked! Thanks again

[rotund token]

Sadly haven't done any personal project in a week

Had our last major milestone last Friday and rc due in like 9 business days

Hoping to have a few days over Christmas to actually work on my own stuff

[solemn hollow]

is the game announced yet? or still secret stuff?
no worries. its not like im in a hurry. that UI stuff is going painfully slow. experimental graphview throwing bricks in my way continuously

[rotund token]

We released it early access over a year ago with no advertising

Just to get feedback

We haven't done an public update in like 11 months though so doing a huge content drop for actual release

I look forward to it being released, who knows how it'll go

[solemn hollow]

you really make me ask the name ? 😄

[rotund token]

The game isn't exactly the type of game I play but it'll be nice to have an actual released game from a studio under my name

[rotund token]

I try not to advertise as this is my personal account, but it's called beyond contact

[solemn hollow]

id never play my games 😛

[rotund token]

If you are interested in the genre I'd strongly recommend waiting till we release 1.0 as there is a lot of changes and updates

[solemn hollow]

ill set it onto my wishlist at the very least. just to spy on you

that said survival games are something i might enjoy. i did play quite a lot of dont starve

[rotund token]

From what I understand this was very much inspired from that

[solemn hollow]

yep the description sure reads like it

[gusty comet]

Holy moly I the new workflow is SO MUCH BETTER

I am outright flabbergasted at how much of an improvement this is from the .50 era

[rotund token]

Compile -> error -> restart unity
/s

[balmy thistle]

What workflow is that?

[balmy thistle]

oof

[solemn hollow]

dont worry it got a lot better with latest entities release and 2022.2 out of beta 🙂

[gusty comet]

I was speaking of how the entity conversion workflow and subscenes in general behave now compared to the .50 release

[rotund token]

better but not solved 😦

i also seem to be one of only a few people who can corrupt his burst cache constantly as well

[balmy thistle]

Oh, that's interesting

How many cores and of what type?

[gusty comet]

huh?

[balmy thistle]

Sorry, I was asking @rotund token about his burst cache corruption

[rotund token]

12+12 (3900x)

[gusty comet]

ah my bad. I am semi distracted so I was not sure if that was intended for me.

[rotund token]

this is like the 4th burst cache corruption i've reported, hopefully not as bad as the last one that took neil 3 weeks to track down even after i got him a 'repo'

though i don't have a good repo for this one yet - i think it's related to asset database lockup and corrupting burst mid way

[gusty comet]

But yeah the 1.0 preview is much more in line with what I was hoping entities can be. I am quite happy with how it operates and performs now.

[solemn hollow]

the one big issue i have with baking is that i cannot add the same Tag Components from multiple bakers even though empty components wouldnt cause race conditions in bakers.

[gusty comet]

I havent done too much with baking yet so I might run into that in the future. I was just thinking how much less friction there is now

Which is a great leap in terms of usability and also teachability. The latter is especially critical.

[viral sonnet]

that's odd because nothing changed in the workflow. just bakers have a different API and less features

[gusty comet]

Compared to .50? Bakers per se did not even exist there as far as I remember

My reference point was .50 and .51

[viral sonnet]

it was the IConvert API before that's been there a long time

[gusty comet]

I admit I havent used dots extensively before due to lack of the out of the box 2d support so I admit bias to some degree

So it might also just be me lacking the necessary experience. But regardless I am for the first time happy with the state of dots, and hopeful.

[hybrid jay]

would be nice though if they had any built in 2d support. It's not even on the roadmap

[gusty comet]

It already has to some degree now

2d animations is not yet up to do date but 2d sprites at least work already.

[hybrid jay]

with a companion gameobject yes (pretty sure thats always been possible), but theres no built in DOTS sprite renderer (apart from the abandoned project tiny package)

[gusty comet]

No it was not possible in .50 at least.

[solemn hollow]

it was. it was possible basically from the very beginning since companion gameobjects where a thing

[gusty comet]

I did some extensive testing back in .50 and when you just tried to convert a gameobject using the old conversion workflow it would just strip off the spriteRenderer component

And you had an entity that now was no longer at all connected to any renderer.

[solemn hollow]

not sure what you did but im working with spriterenderers on entities for at least 2,5 years now

[gusty comet]

Well I did not not do much given the games we make are all 2d and thus dots was a non started because of the lack of out of the box 2d support.

Of course you could do the whole use a quad and then render it that way, but that is not exactly designer friendly.

[solemn hollow]

you can just use gameobjects for all 2D things though.

we use 2D animation and tilemaps

and only render and sync gameobject positions that are actually on screen

[gusty comet]

I am still unsure about how to properly deal with it. My personal experience with ECS (which is admittedly rather oldschool) was more in the sense of the paradigm, stemming from the old roguelike days.

Which makes it a bit hard to wrap my head around how to properly utilize it in a Unity context but that is a me problem admittedly.

Since normally it was an either or kind of thing.

But that seems to be a)not the intended workflow in Unity and b) seems not really feasable in a Unity context.

[drowsy pagoda]

If I have a PhysicsBody on a root entity, and then during runtime, parent another Entity with its own PhysicsCollider to the root entity, will Physics system automatically consider the newly childed entity's collider as part of the compound collider on the body? Or is this something I have to do manually?

[solemn hollow]

if i recall correctly compound colliders are just a dynamicbuffer of colliders on the root. just inspect that buffer and see what happens

[drowsy pagoda]

Ah, I see the PhysicsColliderKeyEntityPair buffer. I'll play around with this.

[narrow field]

Does Jobs/Burst still not support GeometryUtility.TestPlanesAABB?

[solid rock]

It can't because that function takes a managed array as a parameter

[rotund token]

why can't you believe that?

it's part of UnityEngine

Unity.Rendering.FrustrumPlanes has native versions
Intersect(NativeArray<float4> cullingPlanes, AABB a)

or maybe more useful
Intersect2(NativeArray<PlanePacket4> cullingPlanePackets, AABB a)
Intersect2NoPartial(NativeArray<PlanePacket4> cullingPlanePackets, AABB a)

[drowsy pagoda]

How exactly does PhysicsCollider.CastRay work? Description says Cast Ray against this collider. Can someone give me a quick example?

Is it just shorthand for CollisionWorld.CastCollider except that the collider is already given?

[signal phoenix]

It casts a ray that can only hit that specific collider and ignores all others

Similar to https://docs.unity3d.com/ScriptReference/Collider.Raycast.html

[remote crater]

I have a single pickup: Scrap. I assign a tagged component: Bastian & Disabled in the .forEach via ECB in a SystemBase. You'd think the next .foreEach.WithNone<Bastion> would not execute for it since it should have Bastian and Disabled attached by the time the next OnUpdate .ForEach in that SystemBase runs(next cycle), but it often takes many frames/cycles/running of the .foreach until the Bastian & Disabled tags are applied.

The goodnews here is literally my entire game is basically done at this point as far as DOTS/ECS, I have some insanely complex stuff other than this.

I could always hack job by not repicking up something an exact position within X ms.

I want to try and get this clean tho.

[UpdateInGroup(typeof(FixedStepSimulationSystemGroup))]
public partial class SystemAttractor : SystemBase
public static EntityCommandBufferSystem ecbs;
ecbs = World.GetOrCreateSystem<EndInitializationEntityCommandBufferSystem>();

Dani was mentioning order of operations and those give some idea of when they execute... Still... Still if one OnUpdate ECB applies a Component Tag, why is there multi frame OnUpdate(cycle) lag until applied?

[drowsy pagoda]

Wonderful, Thanks!

[remote crater]

What's fun is the next thing I do after this is MASSIVELY database all sorts of spaceship/futuristic equipment items, make em tantalizingly drop for the player depending on common/unc/rare/epic/legendary/unilegendary with particle effects. Then Random encounters/Missions I have story boarded in. Game will be finally at done enough to be fun state by Christmas.

I'm taking AI images I harvested (1.5 million or so now), and they help me get sci fi ideas for strange things.

It's 2022 and AI is helping us with creativity!

Ok found the real problem... It's literally not EVER applying the tag, probably due to a bug.

Thanks everyone for responding.

[drowsy pagoda]

The docs you gave me refers to legacy Collider. I am specifically asking about DOTS PhysicsCollider, I assume that is the equivalent behavior? If so, do I still need to specify the CollisionFilter under RaycastInput?

[signal phoenix]

Yes sorry I meant it was "similar to" the page linked. I'm actually unsure if the collisionfilter matters here, but testing this should be pretty simple

[drowsy pagoda]

Yeah I'm testing and it's not picking up the hit at all. With or without filter set.

[drowsy pagoda]

Sometimes when placing an object into the scene, it will overlap with others, is there a way to "push" it out so they are next to each other. Otherwise, the physics system "pops" it out dramatically causing all kinds of havoc.

[rustic rain]

you could make some editor script for that

[drowsy pagoda]

no, this needs to be during runtime

[rustic rain]

ah

[drowsy pagoda]

it would be nice if collider cast could give you the position of the collider a moment of impact instead of just hit.Position

[rustic rain]

should be simple then, no?

[drowsy pagoda]

what do you mean?

[rustic rain]

it gives you fraction

[drowsy pagoda]

I thought fraction was Start -> hit.Position (Fraction) -> End

[rustic rain]

amount of distance they overlap

and angle

so you can just move back

based on those values

[drowsy pagoda]

how would I get distance of overlap?

[rustic rain]

fraction

[drowsy pagoda]

hmm..it appears I'm not understanding fraction correctly. I thought it was just a normalized percentage between Start and End ray where the hit.Position is.

[rotund token]

in unity physics?

oh yeah that's what it's meant to be

but for some of the cases it's just wrong

it's 0 to max distance or something like that

[rustic rain]

what ray? shouldnt you do a collider casy?

[drowsy pagoda]

oh yeah, fraction is different for collider cast. Is that how it works? Fraction in collider cast is where the collider position "stops" at moment of impact?

[rustic rain]

i dont remember specifics, but character controllers use it heavily for collision detection

[drowsy pagoda]

crap ok, I'll run some tests

[solemn hollow]

FixedStepSimulation Group can run multiple times per frame based on your framerate. EndsimulationCommandBufferSystem will run only once per frame.

[drowsy pagoda]

Holy crap it worked! Collider cast and setting the position to math.lerp(castInput.Start, castInput.End, colliderHit.Fraction); did the trick! Thanks man!

[rustic rain]

👍

[frosty siren]

When we was using EntityQuery.CreateArchetypeChunkArrayAsync(Allocator, out JobHandle) we was getting initialized array instantly and then fetch job was setting elements.
That is important, because further scheduling depends on elements count. From now this method is obsolete and we should use EntityQuery.ToArchetypeChunkListAsync(Allocator, out JobHandle) which returns NativeList<ArchetypeChunk> instead of NativeArray<ArchetypeChunk>.

Will it have same count as array on initialization and we can just replace all array appearance with list?

[rotund token]

no

the old CreateArchetypeChunkArrayAsync said async but it was a lie

it caused a sync point if you had filters this is why it was replaced

[frosty siren]

Ok, so I can't rely on count before complete, only on capacity which isn't always same amount

[rotund token]

either use ToArchetypeChunkArray and just suck the sync point up or if you don't use filters use CalculateEntityCountWithoutFiltering (if you filters you have no choice, if you want the count on main thread you need a sync point)

[frosty siren]

I need chunks array as well

[frosty siren]

I use SCD filter, why it leads to sync point with no choice? Why can't I schedule async list fetching for each SCD?

I guess I know the answer, because it will thrown parallel accessing exception, because it is now actually parallel

[clear radish]

is an EntityQuery managed type and therefore not usable in ISystem with Burst?

[rotund token]

you were already causing sync points in 0.51
if you looka t the source of CreateArchetypeChunkArrayAsync and go into the CreateArchetypeChunkArrayAsync method

            {
                var chunks = new NativeArray<ArchetypeChunk>(chunkCount, allocator, NativeArrayOptions.UninitializedMemory);
                var gatherChunksJob = new GatherChunksJob
                {
                    MatchingArchetypes = matchingArchetypes.Ptr,
                    entityComponentStore = matchingArchetypes.entityComponentStore,
                    Offsets = offsets,
                    Chunks = chunks
                };
                jobHandle = gatherChunksJob.Schedule(archetypeCount, 1, dependsOn);

                return chunks;
            }
            else
            {
                var filteredCounts =  new NativeArray<int>(archetypeCount + 1, Allocator.TempJob);
                var sparseChunks = new NativeArray<ArchetypeChunk>(chunkCount, Allocator.TempJob, NativeArrayOptions.UninitializedMemory);
                var gatherChunksJob = new GatherChunksWithFilteringJob
                {
                    MatchingArchetypes = matchingArchetypes.Ptr,
                    Filter = filter,
                    Offsets = offsets,
                    FilteredCounts = filteredCounts,
                    SparseChunks = sparseChunks,
                    entityComponentStore = matchingArchetypes.entityComponentStore
                };
                gatherChunksJob.Schedule(archetypeCount, 1, dependsOn).Complete();```

if RequiresMatchesFilter
gatherChunksJob.Schedule(archetypeCount, 1, dependsOn).Complete();
it calls complete on the dependency

any WithChangeFilter on EFE etc did this as well

this is why i wrote all my change filter inside IJobEntityBatch in 0.51

and never used change filter on a query

[frosty siren]

yep, I've got this. But now, when I know it, I want to avoid sync point if it is possible. Maybe through custom SCD fetching job

[rotund token]

theres no sync point in doing this in 1.0 now

and they fixed this by making it return a list with a dependency

the issue is just if you need count on main thread

[frosty siren]

wow, great, changing all that to IJobChunk whould be horrible

[rotund token]

so the solution is just avoid that

[rotund token]

EntityQuery works fine in ISystem with burst

[pulsar jay]

I am currently trying to figure out what causes the "Assertion failed 'ValidTRS()' Error" that is plaguing us for some time. I wrote a system that outputs the matrix and the owning entitiy when a matrix is not a valid TRS:

[BurstCompile]
public partial struct AssertValidTRSDebugSystemJob : IJobEntity
{
    public unsafe void Execute(Entity entity, in LocalToWorld localToWorld)
    {
        var ltw = localToWorld;
        var mat = *(UnityEngine.Matrix4x4*) &ltw;
        if (!mat.ValidTRS())
        {
            string code = @$"new Matrix4x4(
    new Vector4({mat.m00}f, {mat.m10}f, {mat.m20}f, {mat.m30}f),
    new Vector4({mat.m01}f, {mat.m11}f, {mat.m21}f, {mat.m31}f),
    new Vector4({mat.m02}f, {mat.m12}f, {mat.m22}f, {mat.m32}f),
    new Vector4({mat.m03}f, {mat.m13}f, {mat.m23}f, {mat.m33}f)
);";
            Debug.Log($"InvalidTRS on entity {entity} {mat.determinant}\n{mat}\n{code}");
        }
    }
}

From the looks of it I cannot figure out while the matrix should be an invalid TRS matrix.

It even generates the code to create the same matrix in C#.
I use this code in a Test. But the test returns true for ValidTRS 😬
Does anybody have an idea why this might happen?

[frosty siren]

How should we build in latest entities package? Back to vanilla build window?

[rotund token]

yes

[rustic rain]

btw, I wonder how subscenes are now stored

as in

can we load it from 3rd party?

[rotund token]

I haven't tried but I believe content management should allow you to

[void girder]

Swapping a sharedcomponent for an entity query doesn't lead to structural changes right?

[rustic rain]

question is more - how do we obtain built subscene

[muted star]

Hi guys, I'm getting these errors when I run my compiled project.

Could not open file C:/Users/SeanN/Desktop/WindowsManual/AssemblyRTS_Data/StreamingAssets/EntityScenes/e16b810eef924d9c922185003659a43f.entityheader for read
Could not open file C:/Users/SeanN/Desktop/WindowsManual/AssemblyRTS_Data/StreamingAssets/EntityScenes/143b1a87ba264c4e944df2fa769a50e3.entityheader for read
Could not open file C:/Users/SeanN/Desktop/WindowsManual/AssemblyRTS_Data/StreamingAssets/EntityScenes/eef4652b96b74b5c9e73b7ea6334d7f6.entityheader for read
Loading Entity Scene failed because the entity header file couldn't be resolved: guid=e16b810eef924d9c922185003659a43f.
Loading Entity Scene failed because the entity header file couldn't be resolved: guid=143b1a87ba264c4e944df2fa769a50e3.
Loading Entity Scene failed because the entity header file couldn't be resolved: guid=eef4652b96b74b5c9e73b7ea6334d7f6.
``` (etc.)
I'm using Unity 2022.0.0f1 with ECS 1.0 experimental, so maybe this issue will be resolved once I upgrade to ECS 1.0 prerelease? 🤷‍♂️

Just noticed that my StreamingAssets folder is indeed missing these files. I probably deleted them on accident :p

How can I have these files be regenerated?

[rustic rain]

reimport might help

[muted star]

Reimporting the subscenes didn't help. Currently doing a 'reimport all', maybe that will fix it.

[muted star]

That didn't generate the files either

[pulsar jay]

I figured it out. A matrix multiplication resulted in the m33 value not being 1f but 0.9999998f which makes it an invalid TRS matrix 😬

[slim nebula]

Where can I find the /Temp/GeneratedCode folder?

or how do I enable it or w/e

[solid rock]

in your project folder. MyProject/Temp

[slim nebula]

does this mean maybe I'm not doing things that partial is used for or something?

[solemn hollow]

you are missing calling the AddJobHandleForProducer on the ECBS.

[muted star]

How can I have these files be

[remote crater]

Ok, that seems reasonable... I was going to ask why my Systembase was running many times before the ECB could finish... What's the industry standard aka way you guys are handling this if I want my system base to only run once per frame to make sure ECB is processed properly?

I even had my code prepped https://pastebin.com/rVQecUfp

Once I solve this issue, that was causing multiple pickups of a single item... I'm literally done with DOTS/ECS techs, and I'll be databasing in items/encounters/storyline 🙂

Maybe there is a simulation group that only runs once per frame

Or maybe I can jury rig it based off getting the time in milliseconds?

Maybe unity has a frame number counter

Time.frameCount

[rustic rain]

you update in FixedStepSimulationSystemGroup

which might run multiple times per frame if it needs to catch up

[remote crater]

issue, the problem I have is

My foreach is adding to say score

on a pickup

And I add a tag: Disabled

but it adds the score 2-3-6 times etc

depending on how many frames cycle

because ECB only updates once a frame

I think with Time.FrameCount, I can deny the run of the same frame more thanonce

and I'm good to go

[rustic rain]

?

sir

EndInitializationEntityCommandBufferSystem

where does it update?

[remote crater]

after foreach like always

[rustic rain]

no I mean

in what group

[remote crater]

My entire code for the class: https://pastebin.com/rVQecUfp

[rustic rain]

I'v seen it yeah

if your buffer system runs in normal frame update

then fixed step can cause desyncs

[remote crater]

Thanks everyone. I think I should be good to go.

YUP!

I use Time.frameCount

Now I can just store it as a local variable and never run a 2nd foreach by checking Time.frameCount against my local

Awesome awesome awesome, you guys all rock. Hopefully I can start competing with Eve online and you guys are friends with a kachillionaire, not just a question asker 😉

Cuz I hook my friends up ph@t 😉

[solemn hollow]

everything exept fixedstepsimulation group runs once per frame

you could have moved it anywhere ^^

[remote crater]

Good to know, but I have an array of spiderweb systems, I'm afraid of touching less some parallel thing flip out, this is as dicey as pointer arithmatic

My next game, I'll be a bit more self aware, this one, I'm just like... Don't touch the balanced deck of cards, it's perfectly situated on the tower of jello.

[rustic rain]

In perfect ECS scenario, removing 1 system will never affect others directly

[remote crater]

Updating in parallel, the timing matters

That's why there's an order integer for the parallelECBs

If I don't use FixedStepSim, it might change orders

[rustic rain]

wdym updating in parallel?

[remote crater]

The solution I have at hand, is pretty much perfect

ParallelCommandBuffers

I have some systems with those, and if the order number is off, my game throws crazy errors

[rustic rain]

🥴

[remote crater]

You know when it tries to destroy phantom things in parallel

Don't worry! It's all good!

It took me a whole year and a half to get here, you guys did good.

Now my ECS/DOTS engine is pretty much 100% complete. To extend and add from here is quite trivial. Maybe within 10 days you can see some fun playable stuff.

Thank you for not just making parallel processing easy (something no one's said ever), but also great support on this chat forum and other forums. I would not have been able to have made such an effective system without help from all you guys. Like I said, I make bank, and you just ask me for help financially who helped me and you got it. I'm gonna try and compete with Eve online whomakes 100 million/month. The DOS/ECS tech + networking tech I have should in theory be able to not just beat Eve online's max players in one fight in a MMO, but do it at 60 FPS, action combat

Enjoy your dev day. I pray everyone has a good productive day and enjoys your work. I'm gonna organize my creative design notes, onto the finally fun frontier every game dev loves to be at!

[true mirage]

Suppose elements of a native array can change but not in jobs or a specific job for example. How can I add [Readonly] attribute for it?
What is the solution?
public struct Voxel{}

[solid rock]

You add the Readonly attribute in the specific job struct that you want it to be readonly in

[true mirage]

I have used main data structures as job data. So, should I define specific structures for jobs?!

[solid rock]

For example one of my jobs here. There are several Readonly native collections and one WriteOnly one that is used for output.

[true mirage]

Voxel struct is the main data structure to store voxel data.
It can be used in job or not

[solid rock]

Sounds like your Voxel is much like my Coordinate

it's just data

the Readonly attribute would go on a specific collection of Voxels that a job would operate on

[true mirage]

Yes, for example I have VoxelWorld. It stores NativeArray<Voxel>.
NativeArray itself does not change but voxels inside can change in a job or not in another job

[solid rock]

yep that's fine. The jobs themselves view a particular collection as Readonly or not

you do that as in my example above

If you need to change the voxels in the array btw that is changing the array

since these are all value types

[true mirage]

Lets ask my question in another way.
When I put [ReadOnly] for a container, it means that container is readonly but values inside can change?

[solid rock]

no

it means it's readonly

the values cannot change

you can only read values from it

not change anything

[true mirage]

Yes, so I am right

[solid rock]

you can neither change elements, nor remove, nor add

[true mirage]

My VoxelWorld struct has NativeArray<Voxel>.
It cannot be [ReadOnly] because in some jobs, voxels can change.
I send VoxelWorld to my job. Should I define new struct and then assign NativeArray inside then mark it [ReadOnly] for that specific job?

[solid rock]

You should only be using [Readonly] within job definitions yes

it means that from the perspective of this job, the collection is read only

Don't forget about [WriteOnly] too!

Useful for collections used as output for your job

[true mirage]

  [BurstCompatible]
    public struct PathFindingJob : IJob
    {
        [ReadOnly] private readonly int3 _sourcePoint;
        [ReadOnly] private readonly int _maxDistance;
        [ReadOnly] private readonly bool _returnFirstValidPath;

        
        [ReadOnly] private AStar _aStar;
        [ReadOnly] private NativeArray<int3> _targetPointArray;
        [ReadOnly] private RoadTargetChecker _targetChecker;
        [ReadOnly] private RoadObstacleChecker _obstacleChecker;
        [ReadOnly] private RoadWeightCalculator _weightCalculator;

It is OK but RoadObstacleChecker,RoadWeightCalculator, etc.
It is nested

  [BurstCompatible]
    public struct RoadWeightCalculator : IPathWeightCalculator
    {
        private static readonly int3 Up = (int3)math.up();

        private readonly int _chunkSize;
        
        private NativeHashSet<int3> _sourcePointSet;
        private PathFindingWeightList _weights;
        private VoxelWorldData _voxelWorldData;

  [BurstCompatible]
    public struct VoxelWorldData
    {
        private readonly float3 _worldOrigin;
        private readonly int _worldSize;
        private readonly float3 _voxelSize;
        private readonly int _chunkSize;
        private readonly int _worldLength;
        private readonly int _voxelCountInChunk;

        public NativeArray<Voxel> Voxels; // It is readonly for PathFindingJob specific job 

        public NativeArray<FirstDownwardBlockedVoxel> FirstDownwardBlockedVoxels;

[drowsy pagoda]

Is there a built-in way to copy a PhysicsCollider? Or do I have to manually do it? If so, does this mean I need to do a switch (colliderType) deal?

[solid rock]

Copy it in what sense?

[drowsy pagoda]

I have lots of items that share a collider via pointer in PhysicsCollider. I want to "pick" an item up, modify it's collision filter WITHOUT touching the shared pointer. So I want to copy the shared collider to it's own separate unique, modify it, assign it to the item that's picked up.

[solid rock]

Well there's the IConvexCollider interface, but I can't find the documentation

might be helpful?

[drowsy pagoda]

ah...is this valid? var uniqueCollider = new PhysicsCollider { Value = itemSharedCollider.ColliderPtr->Clone() };

[true mirage]

After adding [Readonly] attribute to fields of Job data structure (PathFindingJob ) and not nested data structure, my problem was solved. thanks

[drowsy pagoda]

Yeah docs are so sparse...

[true mirage]

One problem was
You cannot use a writable container in different data structures. ... and ... are the same
aliasing

[true mirage]

Here, I can get the result

but outside the job, cannot. It is empty

[viral sonnet]

write is the default state so the tag isn't really required other than being explicit about the usage

[solid rock]

Isn't it read/write by default?

[viral sonnet]

hm, i'm not aware [WriteOnly] prevents you from reading. let me check

[hushed lichen]

Presumably it would with that name 🙂

[true mirage]

The default is read/write surely. It is logical

[viral sonnet]

the tags are for the job system to figure out how to queue jobs so it doesn't differentiate between it. it's either read or read/write as write is the same thing really. other read/write states are saved in the handles themselves like ComponentTypeHandle. same goes for NativeArray

[solid rock]

Maybe share the code for your Job(s) and how you're creating and scheduling it?

[viral sonnet]

for example, with a readOnly marked NativeArray you can't request a RW pointer or set data

but those are 2 seperate things for the same concept

[true mirage]

 [BurstCompatible]
    public struct PathFindingJob : IJob, IDisposable
    {
        [ReadOnly] private readonly int3 _sourcePoint;
        [ReadOnly] private readonly int _maxDistance;
        [ReadOnly] private readonly bool _returnFirstValidPath;

        [ReadOnly] private AStar _aStar;
        [ReadOnly] private NativeArray<int3> _targetPointArray;
        [ReadOnly] private RoadTargetChecker _targetChecker;
        [ReadOnly] private RoadObstacleChecker _obstacleChecker;
        [ReadOnly] private RoadWeightCalculator _weightCalculator;

        [WriteOnly] public PathResult PathResult;

        public PathFindingJob
        (
            AStar aStar,
            int3 sourcePoint,
            int maxDistance,
            int3[] targetPointArray,
            bool returnFirstValidPath,
            RoadTargetChecker targetChecker,
            RoadObstacleChecker obstacleChecker,
            RoadWeightCalculator weightCalculator
        )
        {
            _aStar = aStar;
            _sourcePoint = sourcePoint;
            _maxDistance = maxDistance;
            _targetPointArray = new NativeArray<int3>(targetPointArray, Allocator.TempJob);
            _returnFirstValidPath = returnFirstValidPath;
            _targetChecker = targetChecker;
            _obstacleChecker = obstacleChecker;
            _weightCalculator = weightCalculator;

            PathResult = new PathResult(Path.Empty);
        }


        public void Execute()
        {
            PathResult = _aStar.FindPath
            (
                _sourcePoint,
                _maxDistance,
                _targetPointArray,
                _returnFirstValidPath,
                _targetChecker,
                _obstacleChecker,
                _weightCalculator
            );
        }

        public void Dispose()
        {
            _targetPointArray.Dispose();
        }
    }

@solid rock .

[solid rock]

You would need a NativeReference<PathResult> if you want to change it in the job

[true mirage]

 var job = new PathFindingJob
                        (
                            _pathFinder,
                            sourcePoint,
                            aStarSetting.SearchRange,
                            roadPoints,
                            returnFirstPath,
                            targetChecker,
                            new RoadObstacleChecker
                            (
                                _height,
                                _roadOrigin,
                                _buildingSize,
                                targetChecker,
                                _voxelWorldData
                            ),
                            new RoadWeightCalculator(_chunkSize, sourcePointSet, _weights, _voxelWorldData)
                        );
                        var jobHandle = job.Schedule();
                        jobHandle.Complete();
                        var pathResult = job.PathResult;

[true mirage]

Thanks. It says
The type 'PathFinding.PathResult' must be valid unmanaged type (simple numeric, 'bool', 'char', 'void', enumeration type or struct type with all fields of unmanaged types at any level of nesting) in order to use it as a type argument for 'T' paramete

It is struct

[solid rock]

a struct containing what

[true mirage]

 [BurstCompatible]
    public readonly struct PathResult
    {
        public Path Path { get; }
        public NativeArray<PathStep> Steps { get; }

[true mirage]

Again struct

[solid rock]

thos are properties

get only properties in fact

where are the fields

[true mirage]

  [BurstCompatible]
    public readonly struct Path
    {
        public static readonly Path Empty = new(new NativeArray<int3>(0, Allocator.TempJob));
        public bool IsEmpty => Points.Length == 0;
        public int Length => Points.Length;
        public NativeArray<int3> Points { get; }

[solid rock]

Can you share the full code for these structs?

Use a paste site. #854851968446365696

[true mirage]

There are initialized in ctor

I put them

[solid rock]

You didn't share any fields

[true mirage]

 [BurstCompatible]
    public readonly struct PathResult
    {
        public Path Path { get; }
        public NativeArray<PathStep> Steps { get; }

        public bool IsEmpty => Path.IsEmpty;

        public PathResult(Path path) : this(path, new NativeArray<PathStep>(0, Allocator.TempJob))
        {
        }

        public PathResult(Path path, PathStep step) : this(path, new[] { step })
        {
        }

        public PathResult(Path path, PathStep[] steps) : this(path, new NativeArray<PathStep>(steps, Allocator.TempJob))
        {
        }

        public PathResult(Path path, NativeArray<PathStep> steps)
        {
            Path = path;
            Steps = steps;
        }
    }

 [BurstCompatible]
    public readonly struct Path
    {
        public static readonly Path Empty = new(new NativeArray<int3>(0, Allocator.TempJob));
        public bool IsEmpty => Points.Length == 0;
        public int Length => Points.Length;
        public NativeArray<int3> Points { get; }

        public Path(int3[] points, Allocator allocator = Allocator.Temp)
        {
            if (points == null) throw new ArgumentNullException(paramName: nameof(points));

            Points = new NativeArray<int3>(points, allocator);
        }

        public Path(NativeArray<int3> points)
        {
            Points = points;
        }
    }

[solid rock]

I'm not sure your struct can contain a native collection

[true mirage]

  [BurstCompatible]
    public struct PathStep
    {
        public int3 SourcePoint;
        //public NativeArray<int3> TargetPoints;
        public int LoopCount;
        public int SkipCount;
        //public NativeArray<int3> SeenPoints;
    }

[true mirage]

I doubt as well. WTH

When it gets the result, it should return it easily! the job is done

[viral sonnet]

int3[] is managed

[true mirage]

Wow :/

[solid rock]

I don't see an int3[]

[true mirage]

It is only ctor argument not fields

[solid rock]

Oh right

yeah you can't have that

[true mirage]

Thanks, dudes

[viral sonnet]

same goes for PathStep[]

new[] etc

[solid rock]

The other thing is since you made those properties get only, the system has no way to initialize your structs

especially without the use of your constructors

which it certainly can't use

[true mirage]

I said, using ctor, why can't?

[solid rock]

Because it's just not that kind of system

it's not going to analyze your code for matching constructors like some kind of dependency injection system

it's not that smart in that area

[true mirage]

OK, I remove all of them, only simple public fields

I should have done it before 🙂

[solid rock]

Anyway I'm not convinced you can have a NativeCollection as a field

[viral sonnet]

NativeArray/List etc... is burst compatible

since 1.0

[true mirage]

Yes, the problem is NativeArray inside PathResult

not int[] array in ctor args

[solid rock]

Sounds about right

With the job system generally you kinda "flatten" everything

Like just having separate NativeArray<PathStep> and NativeArray<int3> and passing those directly into the job

[true mirage]

Thanks, so the only way is to separate data inside PathResult and define NativeArray inside jobs as result?

It ruins structure of my codes really brutally

[solid rock]

I don't know if that's the only way but it's the straightforward way

Generally you won't be able to maintain the same object structures inside jobs as in your managed code

Often you will want/need a translation layer that converts the data from managed to something your Job understands and back

[rotund token]

where/how are you disposing all these random NativeArray tempjobs you allocate?

[solid rock]

He isn't!

[viral sonnet]

tertle have you found out how to create blobs in a BakingSystem?

[viral sonnet]

you are not on entities 1.0, right?

[BurstCompatible] gives it away somewhat because that tag is obsolete. 🙂

also not needed, it's for writing tests

[solid rock]

I think he wants [BurstCompile] tbh

[viral sonnet]

right, he wrote [BurstCompatible] public struct PathFindingJob : IJob, IDisposable - use [BurstCompile] tag and remove it from the structs. it's not needed

[hushed lichen]

Easy mistake to make if you're not paying attention because Compatible shows up before Compile in the auto-completion suggestions

[viral sonnet]

now it also makes sense that burst doesn't complain about int[] - it's never burst compiled

[drowsy pagoda]

Ok, I got a gnarly situation. During runtime, I have two separate entities. At some point (and this is done on main thread outside jobs and Entities.ForEach, just good ol' EntityManager inside a SystemBase) I parent one of the items to the other. I verify this in the inspector, all looks good, the parent has the referenced entity in the child buffer, and the child has the referenced entity in the Parent component. Then, many many many, like thousands of frames later, I take that parent entity (with its new child) and I need to run a foreach (var child in GetBuffer<Child>(parentEntity)) in order to do some stuff.
Just running that foreach throws the following every time for the entire lifetime of the entity:
ObjectDisposedException: Attempted to access BufferTypeHandle<Unity.Collections.NativeText.ReadOnly> which has been invalidated by a structural change.

How can I "validate" it? Or I don't really know what I need to do here.

Is there something else I need to do besides AddComponent<Parent> and AddComponent<LocalToParent>?

Or is this a bug?

Here is the code that does the parenting:

private void AssembleProtocol()
{
    if (!_assembleReady)
        return;

    var itemInHand = App.Player.Inventory.ItemOnHand;
    var targetItem = App.Player.LookTarget;
    var targetItemTransform = GetComponent<LocalToWorld>(targetItem);

    EntityManager.AddComponentData(itemInHand, new Parent { Value = targetItem});
    EntityManager.AddComponent<LocalToParent>(itemInHand);
    
    SetComponent(itemInHand, new Translation
    {
        Value = _ghost.Position - targetItemTransform.Position
    });
    
    SetComponent(itemInHand, new Rotation
    {
        Value = math.mul(_ghost.Rotation, math.inverse(targetItemTransform.Rotation))
    });

    unsafe
    {
        var itemCollider = GetComponent<PhysicsCollider>(itemInHand);
        itemCollider.Value.Dispose();
        EntityManager.RemoveComponent<PhysicsCollider>(itemInHand);
        EntityManager.RemoveComponent<PhysicsColliderKeyEntityPair>(itemInHand);
        
        itemCollider = App.Player.Inventory.ItemCollider;

        var colliderBuffer = GetBuffer<PhysicsColliderKeyEntityPair>(targetItem);
        colliderBuffer.Add(new PhysicsColliderKeyEntityPair
        {
            Entity = itemInHand,
            Key = new ColliderKey(itemCollider.ColliderPtr->NumColliderKeyBits, 0)
        });
    }

    _ghost.Destroy();
    App.Player.Inventory.DropItem();
}

[slim nebula]

I got a bit of a spike on startup and it bumps my unity.netcode to an odd state. Any ideas?

(not the spike, I mean on how to recover from this effed up elapsed time)

[whole gyro]

Can you share the code that iterates the child buffer? That's where the error is coming from, right?

[drowsy pagoda]

private Entity BuildGhostFromSource(Entity item)
{
    Assert.IsFalse(item == default, "Item cannot be null");
    
    Entity ghost;
    if (EntityManager.HasComponent<MaterialMeshInfo>(item))
    {
        ghost = EntityManager.Instantiate(App.Prefabs.GhostPrototype);
        var info = EntityManager.GetComponentData<MaterialMeshInfo>(ghost);
        info.Mesh = EntityManager.GetComponentData<MaterialMeshInfo>(item).Mesh;
        EntityManager.SetComponentData(ghost, info);
    }
    else
        ghost = EntityManager.Instantiate(App.Prefabs.GenericPrefab);
    
#if UNITY_EDITOR
    EntityManager.CopyName(item, ghost, "{0} [Ghost]");
#endif
    var scale = new NonUniformScale { Value = new float3(1f, 1f, 1f) };
    if (EntityManager.HasComponent<NonUniformScale>(item))
        scale = EntityManager.GetComponentData<NonUniformScale>(item);
    
    EntityManager.AddComponentData(ghost, scale);

    if (EntityManager.HasBuffer<Child>(item))
    {
        EntityManager.AddBuffer<Child>(ghost);

        foreach (var childItem in EntityManager.GetBuffer<Child>(item))
        {
            var childGhost = BuildGhostFromSource(childItem.Value);
            EntityManager.SetParent(childGhost, ghost);
            EntityManager.CopyComponent<Translation>(childItem.Value, childGhost);
        }
    }
    
    return ghost;
}

[whole gyro]

You can't do structural changes while iterating a buffer

Looks like you are iterating the child buffer and then recursively calling BuildGhostFromSource which does a structural change (AddBuffer)

One option is to change your foreach (child) to a classic for loop and call GetBuffer each iteration. But that isn't exactly the fastest option. You could also turn the buffer into a native array to grab a snapshot of it

Even if you never modify the dynamic buffer, ANY structural change any where else will invalidate the GetBuffer returned valid

Alternatively, move all your structural changes for the ghosts to an ECB

[drowsy pagoda]

Thanks so much. I wouldn’t have figured this out on my own.

[whole gyro]

no problem. That one has bitten me quite a few times

[whole gyro]

Its possible that you have another problem. Typically the error will say that the Child buffer was invalidated. Not sure why its complaining about Unity.Collections.NativeText.ReadOnly, whatever that is

[drowsy pagoda]

Let me take care of the recursion first and see if this goes away.

[balmy thistle]

Before you take care of the recursion you're going to want to take care of the recursion

[viral sonnet]

that's while(true)

[hushed lichen]

How to fix recursive problems:
To fix your recursive problem, see ´How to fix recursive problems´

[rotund token]

just get the baking system

it holds the blob asset store

[viral sonnet]

ok cool, thanks

[drowsy pagoda]

I'm trying this approach, but the issue is the deferred Entity ID. Is there a way for me to pick up the correct ID on next frame and store it?

[whole gyro]

You can usually work around this by using the ECB to store the deferred id in a component

[drowsy pagoda]

Yeah I figured this is still the approach, just thought to check if they made a utility that can do this for me.

Fuck there is so much red tape, I'm already losing track of what I was doing in the first place lol.

[hushed lichen]

The way I've managed a similar issue before was storing it in a DynamicBuffer

[drowsy pagoda]

Looks like that was the problem. When I fixed the recursion issue, the problem went away.

[true mirage]

LOL, YES

[drowsy pagoda]

Ok, next question. So when I parent an entity to another, these entities have their own PhysicsColliders. From what I can tell, the children of an entity that has a body do not have a PhysicsCollider component or a PhysicsColliderKeyEntityPair buffer attached to them. So when I parent a child, I add the following element to the parent's PhysicsColliderKeyEntityPair buffer:

var colliderBuffer = GetBuffer<PhysicsColliderKeyEntityPair>(parentEntity);
colliderBuffer.Add(new PhysicsColliderKeyEntityPair
{
    Entity = childEntity,
    Key = new ColliderKey(childCollider.ColliderPtr->NumColliderKeyBits, 0)
});

I'm not sure what to put for the Key field. The ColliderKey constructor takes two args: numSubKeyBits and subKey. What do I put for those values and what do they mean? Or is it enough to just assign the Entity and that's it? So far I just copied the NumColliderKeyBits from the child collider. How does this work?

[true mirage]

To boos speed in editor, I should uncheck safety checks and debugger?

[true mirage]

Is there something like Linq for NativeArray and NativeList?

[wild onyx]

what's wrong with regular Linq, they implement IEnumerable<T> so Linq works.

[rotund token]

linq does not work in burst

https://gitlab.com/tertle/com.bovinelabs.core/-/blob/0.9/BovineLabs.Core/Extensions/NativeArrayExtensions.cs

i have a bunch of linq like extensions in here for native arrays though if you want that work in burst

Where, Select, All, Any, FirstOrDefault, IndexOf

[true mirage]

Yes, works but it is not slow?

also boxing

[true mirage]

Yes, I have implemented some of them and also Reverse, FastRemove, etc.

[rotund token]

yeah i have a reverse in there

but i don't consider that linq i guess

[true mirage]

You know why I ask, because if there is I do not need to implement them :/

Also, I need PriorityQueue and Octree job friendly. Probably, I can find it

[wild onyx]

whether or not Linq is "slow" depends on what you are doing. A generalized "Linq is bad" attitude doesn't make much sense. In a burst compiled jobs its probably not really the right way of processing data. It being generally not a context where you need/want lazy evaluation

[true mirage]

for, foreach and iterator in jobs nativearray and nativelist, all are almost the same? I will test it

[wild onyx]

if its just about convenient API in burst, self-implementing them so you can know exactly what's going on is probably the right choice, since bursted code is all about the optimization details.

[true mirage]

Thanks. Finally, I have implemented my algorithm with job system, it works

but it seems it is slow at least in editor:/

Also, I see some errors although it returns the result correctly.

[rotund token]

does anyone ever lock up after a recompile, hitting play, and subscenes don't seem to convert

and if you attach a debugging to unity and force breakpoint it's lokced up on
AssetDatabasExperimental.ProduceArtifact()?

being called from ResolveSceneReferenceSystem

quitting from this lockup is what also seems to cause my burst corruption

after a reload into the project the burst cache is completely corrupted and requires another delete + restart

[balmy thistle]

I have not seen that in years

Any crash in the asset import logs?

[rotund token]

i can repo this reasonably easily

i probably overrode my logs but i'll look again next time

but i'm pretty sure i've looked into this before and saw nothing of interest

on a side note, 2022.2.1f1 seems to have broken openupm?

  One or more packages could not be added to the local file system:
    com.bovinelabs.analyzers: Hostname/IP does not match certificate's altnames: Host: openupm.sfo2.cdn.digitaloceanspaces.com. is not in the cert's altnames: DNS:*.ssl.hwcdn.net, DNS:ssl.hwcdn.net```

[balmy thistle]

but can I reproduce it easily?

[balmy thistle]

erp, one sec

[rotund token]

probably not

considering i have not seen anyone else report this specifically

i can throw you the project, you might be able to do it 🤷‍♂️

[balmy thistle]

sure

Not at the moment, I'm practicing banjo, but tomorrow sometime

[rotund token]

yeah np

i'm going to see if i can get a slightly more reliable repo

[whole gyro]

I've been running into an issue that sounds similar, but haven't attached a debugger to see what's going on. I'll hit play and unity will totally freeze. Mouse cursor won't render over the editor window. Basically no cpu usage of the unity process. I have to force exit the process and restart unity, then everything is fine.

[rotund token]

yeah sounds familiar

hook up a debugger next time and let me know if it's same spot

i'll feel a tiny bit better if it's not just me

[whole gyro]

Not sure what you mean by burst cache corrupted, but I do get the entity subscene header can't be loaded thing sometimes. Don't think its correlated with the above issue though

[rotund token]

https://forum.unity.com/threads/burst-corruption.1370103/

This Exception was thrown from a function compiled with Burst, which has limited exception support.
0x00007ff7026706fd (Unity) burst_signal_handler
0x00007ff809428b4c (ntdll) RtlDeleteAce
0x00007ff8094012c6 (ntdll) RtlRaiseException
0x00007ff809450f4e (ntdll) KiUserExceptionDispatcher
0x00007fff921e84cf (9c33427477f2fcf9f52aa87bcd77068) Unity.Physics.Systems.CreateJacobiansSystem::Unity.Physics.Systems.CreateJacobiansSystem.OnUpdate (at I:/Documents/BovineLabs/com.bovinelabs.shattered/Library/PackageCache/com.unity.physics@1.0.0-pre.15/Unity.Physics/ECS/Base/Systems/UnityPhysicsSimulationSystems.cs:271)```

i get a bunch of null refs from function pointers

[whole gyro]

okay yeah I don't think I've seen those errors

[rotund token]

doesn't happen every time for me and i suspect it's just related to me force closing unity during this lockup

while burst is compiling

[whole gyro]

I'll try attaching a debugger next time it happens

[whole gyro]

well that didn't take long. @rotund token
Lots of burst threads waiting but found one with the same call stack

[rotund token]

woo not just me

two of us

[whole gyro]

yay 🎉

and yeah, it does look like I was when trying to enter playmode while something was happening in the background

I don't have the "Hold on (busy for ...)" loading bar that you seemed to have on the forum thread

pretty sure I had turned off burst compilation now that I think about it

[rotund token]

i dont have that always

the one i reported today did not have that

just the subscene trying to load like you're seeing

[whole gyro]

got it

just added a reply to that thread

[deft ridge]

NativeHashMap AsParallelWriter not work in ecs 1.0, what can i replace it with

[rustic rain]

There is parallel version. It's standalone type

[deft ridge]

I need to tryAdd NativeHashMap in IJobEntity

[rustic rain]

sir. it was split into multiple types

parallel and singlethread

there is no parallel writer anymore

[deft ridge]

😂

[deft ridge]

thank! oh is NativeParallelHashMap, blind me,

[drowsy pagoda]

In some cases, I have a game object in sub scene, but I don't want it to actually convert. I don't see option in Baker for DestroyEntity or AbortConversion type deal. Is this not possible?

[rustic rain]

add tag and destroy in system

[drowsy pagoda]

ok

[rotund token]

this is going to drive me nuts

because it's not allowed to be static due to SystemAPI

[rustic rain]

is it?

check if codegen works

it might simply ignore static modifier

[rotund token]

it's an error in unity

if you make it static

SystemAPI needs instance context or something like that

it makes sense

[rustic rain]

not really. unless they check for static attribute specificaly

[solemn hollow]

look at BakingOnlyEntityAuthoring. beware that it marks all children as baking only entities too

[solemn hollow]

hmm which callback can i use to start codegen on multiple scriptable objects before the game starts? it will need to recompile after the codegen

[rustic rain]

are you talking about source gen?

[solemn hollow]

no i am generating classes from templates

[rustic rain]

ah

[solemn hollow]

each scriptable object needs to generate a class (a generic system)

up until now i codegenerated whenever the user made a change in the scriptable object in OnValidate. but that is a really slow workflow. the generated classes are not important while in editor so i can codegen only once at gamestart instead of each change the user makes

i just dont know how to trigger the codegen at the right time

[mild ledge]

Hi, so I am looking at some bathc render group api code and there is a comment there // TODO: WAITING FOR THE JOB HERE! THIS IS SLOW! NEED THE MULTITHREADED FENCE VERSION! I know what a fence is but Im not understanding how to use one with the job system. Can someone please explain this?

[true mirage]

Hi dudes.
My code works but there is an error in console log

F:\Work\Companies\PelleStudio\Projects\MiniCityProject\MiniCity\Assets\Project\Game\Scripts\Bitzooma\MiniCity\Runtime\Utility\PathFinding\AStar.cs(387,21): Burst error BC1059: Method `Bitzooma.MiniCity.Utility.PathFinding.AStar.<>c__19`3<Bitzooma.MiniCity.Utility.PathFinding.RoadTargetChecker,Bitzooma.MiniCity.Utility.PathFinding.RoadObstacleChecker,Bitzooma.MiniCity.Utility.PathFinding.RoadWeightCalculator>.<FindPath>b__19_0(Bitzooma.MiniCity.Utility.PathFinding.Node)` is being compiled as a function pointer, but both it and its declaring class `Bitzooma.MiniCity.Utility.PathFinding.AStar.<>c__19`3` are missing the [BurstCompile] attribute. To fix this error, add the [BurstCompile] attribute to `Bitzooma.MiniCity.Utility.PathFinding.AStar.<>c__19`3<Bitzooma.MiniCity.Utility.PathFinding.RoadTargetChecker,Bitzooma.MiniCity.Utility.PathFinding.RoadObstacleChecker,Bitzooma.MiniCity.Utility.PathFinding.RoadWeightCalculator>.<FindPath>b__19_0(Bitzooma.MiniCity.Utility.PathFinding.Node)` and `Bitzooma.MiniCity.Utility.PathFinding.AStar.<>c__19`3`.

What does it mean? PathFinding.AStar.<>c__193``

AStar, RoadWeightCalculator, Node, RoadTargetChecker all have [BurstCompile] attribute

[turbid dawn]

Hello ^^
I am still tyring to reloade the scene but I am encounting many problems. I have a subscene that contains a singleton. When I do this

SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex, LoadSceneMode.Single);

I get this
InvalidOperationException: GetSingleton<TornadoComponent>() requires that exactly one TornadoComponent exist that match this query, but there are 0.

[true mirage]

Can't I use static methods of a static class in burst?
So, I have to add BurstDiscard?

[rustic rain]

show code

[rustic rain]

you can

[true mirage]

var (currentNode, minIndex) = openList.MinBy(o => o.Priority);
Here, I get the warning

[rustic rain]

ah, generics

check manual of burst on them

oh

wait

lambda is managed

no burst

[true mirage]

yes, my noob

[rustic rain]

do you load sumscene?

[turbid dawn]

I have tired but the subscene and the scene but both give the same error

[rustic rain]

then you should start with this error instead

[turbid dawn]

The error only comes when I try to restart the scene. I think it is becuse the subscene contains a gameobject that has the component, and maybe converts it at runtime to an entity ?

I have tired to do this and it resets the scene but throws errors

DefaultWorldInitialization.Initialize("Default World", false); EntityManager.DestroyEntity(EntityManager.UniversalQuery); World.Dispose(); SceneManager.LoadScene("DOTS Tornado", LoadSceneMode.Single); World.GetExistingSystem<ConstructionSystem>().Enabled = true; World.GetExistingSystem<ParticleSystem>().Enabled = true; World.GetExistingSystem<TornadoSystem>().Enabled = true; World.GetExistingSystem<UpdateBarsSystem>().Enabled = true; World.GetExistingSystem<UpdateCameraSystem>().Enabled = true;

the errors

ObjectDisposedException: Cannot access a disposed object. Object name: 'The NativeArray has been disposed, it is not allowed to access it'. ... ObjectDisposedException: Cannot access a disposed object. Object name: 'The NativeArray has been disposed, it is not allowed to access it'. ... System.InvalidOperationException: The specified {0} does not exist in the hierarchy. This Exception was thrown from a job compiled with Burst, which has limited exception support. Turn off burst (Jobs -> Burst -> Enable Compilation) to inspect full exceptions & stacktraces

[rustic rain]

error is self explanatory. you disposed of world, now it`s equal to null

[solemn hollow]

you can require the singleton for update. that way the system will not throw the error when the singleton is not there

[turbid dawn]

You are talking about the RequireSingletonForUpdate<SystemExampleSingleton>(); right? I have tried that and it eliminates the tornado

[turbid dawn]

Yes but the tornado and buildings are still there and gets reset perfectly

[rustic rain]

then you need to get reference to that world

instead of using disposed one

[turbid dawn]

how do I do that ? and when I get the new world I shold make the singleton right?

[rustic rain]

I don`t know what creates your world after you disposed of previous

[turbid dawn]

Does anyone have an idea of how I can reset the simulation another way? I have tried solving this problem for the last couple of weeks and nothing seems to work...

[true mirage]

It is slower even slower than algorithm without job :/

Without job, I have used priority queue in finding shortest path but in job, I have used simple list but I do not think it is related to that

[rotund token]

did you get your code running bursted yet?