Profiling 101

[nimble flume]

What's wrong then?

[nimble flume]

You should get something like this

[nimble flume]

You did not stop?

[faint linden]

the game is going rn

[nimble flume]

Stop it

Click a frame

[nimble flume]

Set that to hierarchy

Nevermind

Click on that peak

Then set to hierarchy

[nimble flume]

So your game is actually almost doing nothing

[faint linden]

yeah its on a menu screen

[nimble flume]

...

[faint linden]

...

[nimble flume]

.......

[faint linden]

.......

[nimble flume]

Your a potato head. Of course we need to profile the actual game with all the enemies.

Smart ass 😛

Profiling the actual main menu

That was funny

[faint linden]

ok gimme a few mins to get to the point with all the enemies

[nimble flume]

Profiling 101

[faint linden]

@nimble flume

[nimble flume]

Your still playing

Anyhow, this looks more like it

Open up the PlayerLoop, and go down there

Look up the methods that are taking most of the 99% of your time

[nimble flume]

Why is it still purple?

[faint linden]

i paused the game instead of stopping it

[nimble flume]

Ahh

Okay

Anyhow, theres your problem

[faint linden]

cpu rendering

I NEED RAY TRACING

[nimble flume]

Your physics system wrecks your CPU

[faint linden]

why

[nimble flume]

I don't know how you set it up. But there's your problem

[faint linden]

how fix

gpu?

[nimble flume]

You can't do physics on the GPU.

I don't even know why you need physics for a bullet hell game like that.

Normally just colliders would be enough

[faint linden]

so how fix

[nimble flume]

🤷‍♂️

What kind of physics are you even using?

[faint linden]

none

[nimble flume]

The profiler says otherwise ^-^

You are spending 200 ms on physics each frame

[rapid ore]

so on the bullets
is there a collider2D ?

[faint linden]

yes

[rapid ore]

and a rigidbody?

[faint linden]

yes

[rapid ore]

i would only put a rigidbody on the object that bullets can hit
like your player

[faint linden]

bullets dont hit the player

[rapid ore]

ok i meant the enemy in this case

[faint linden]

why would that make it better

[rapid ore]

rigidbody are expensive
having them one thousends of objects .... kind of a issue

[faint linden]

whats a lot on the screen are the rats

and the rats dont have any rgid bodies

[rapid ore]

so only the bullets

[faint linden]

there is no bullets on the screen

there is just a couple saw blades

[nimble flume]

Or skip them altogether and raycast yourself?

That's how I would do it in DOTS

But don't know if that works in MonoBehaviour style

[faint linden]

i thought unity was more powerful than this

[rapid ore]

we are still taking about a scenario like this?`

[faint linden]

yes

[nimble flume]

And do the bullets ignore collisions with bullets?

[faint linden]

yes

[nimble flume]

With the ignore layer thing right? not in your code?

Otherwise it's colliding constantly with hundreds of its own bullets, and the enemies too.

[faint linden]

private void OnTriggerEnter2D(Collider2D collision) {
        if (collision.gameObject.tag == "Enemy") {
            gameController.score += 1;
            GameObject xpOrb = Instantiate(xpPrefab);
            xpOrb.transform.position = collision.gameObject.transform.position;
            gameController.xpOrbs.Add(xpOrb);
            Destroy(collision.gameObject);
        }
    }```

[nimble flume]

https://docs.unity3d.com/Manual/LayerBasedCollision.html

[faint linden]

thats what i have on the saw blades and bullets

[nimble flume]

Yeah but then when it enters another bullet, it also fires of that code, checks if it's not an enemy and returns.

That will eat your CPU up too

Just let the bullet layer ignore bullets

And the enemies layer ignore enemies

[faint linden]

but doesnt it say 99% is phyics engine

not code

[nimble flume]

Yeah, but the physics engine calls those methods

[faint linden]

also there is still no bullets on the screen

idk why we are talking about bullets

[nimble flume]

And the enemies layer ignore enemies

[faint linden]

the enemies dont have rigid bodies

[nimble flume]

Okay, so you don't have anything with Physics in your game then if you don't fire a bullet?

[faint linden]

just the saw blades

and i dont think they are causing the latency because it was going to 0 fps even before i had the saw blades

here is da rat

[nimble flume]

Show the Rat script

[faint linden]

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class RatScript : MonoBehaviour {
    public Rat ratPrefab;
    public List<Rat> rats;
    float timer;
    public GameObject characterObject;
    public const float ratSpeed = 0.5f;
    private float spawnDelay = 2.5f;
    void Update() {
        timer += Time.deltaTime;
        if (timer >= spawnDelay) {
            timer -= (spawnDelay);
            spawnDelay *= 0.99f;
            Rat instantiatedRatLeft = Instantiate(ratPrefab);
            instantiatedRatLeft.transform.position = new Vector2(Random.Range(-20, -11), Random.Range(-11, 11));
            rats.Add(instantiatedRatLeft);
            Rat instantiatedRatRight = Instantiate(ratPrefab);
            instantiatedRatRight.transform.position = new Vector2(Random.Range(11, 20), Random.Range(-11, 11));
            rats.Add(instantiatedRatRight);
        }
        foreach (Rat rat in rats) {
            if (rat != null) {
                float dx = characterObject.transform.position.x - rat.gameObject.transform.position.x;
                float dy = characterObject.transform.position.y + 0.8f - rat.gameObject.transform.position.y;
                float t = Mathf.Rad2Deg * Mathf.Atan(dy / dx);
                if (dx < 0) {
                    t += 180;
                }
                rat.vx = ratSpeed * Mathf.Cos(Mathf.Deg2Rad * t);
                rat.vy = ratSpeed * Mathf.Sin(Mathf.Deg2Rad * t);
                rat.transform.Translate(new Vector2(rat.vx * Time.deltaTime, rat.vy * Time.deltaTime));
            }
        }
    }
}

[nimble flume]

That's not this one?

[nimble flume]

Okay so that's empty

[faint linden]

ye

[nimble flume]

I would delete it, that's still eating CPU

But it's not your Physics problem

I have no idea, you are not giving me anything related to Physics, but it's the Physics system that's killing your game.

[faint linden]

idk what to show u

[nimble flume]

Yeah, and I sadly can not help then

[faint linden]

does the profiler show anything else?

that will show where it is

[nimble flume]

You could open it up more

[rapid ore]

maybe 2D multi threaded could help

https://docs.unity3d.com/ScriptReference/PhysicsJobOptions2D-useMultithreading.html

[faint linden]

but this isnt even a big game

[nimble flume]

Open up those

[rapid ore]

https://forum.unity.com/threads/profiler-physics2d-findnewcontacts.611584/

[nimble flume]

That's the one I'm reading ^-^

So, circle collider is best

[faint linden]

i just dont understand why unity is struggling this hard, i switched to unity cause i was told it was more powerful

[nimble flume]

And it seems it's still looking for collisions against other enemies, as an enemy.

So do the layer thing I mentioned

[faint linden]

on the rat?

[nimble flume]

Yeah start with that first.

[faint linden]

how i do it

[nimble flume]

Also make sure the rat has the Layer Rat

It's struggling because you tell it to look for collisions against hundreds of gameobjects with hundreds of gameobjects each frame.

You can shoot 14 million bullets in Unity without lag, if you just optimised it.

[rapid ore]

can you try enabeling this checkbox in the unity 2D pysics settings?

[faint linden]

ok

mmm where are the settings

[rapid ore]

Edit -> Project Settings -> Physics 2D

[faint linden]

ok its on

how do i do the layer ignore thingy

i still dont know why the rats would be colliding with eachother if they dont have rigid bodies

[nimble flume]

That's fair, I don't know either, but I am concluding 3 things:
The physics system is killing your game
You don't have any gameobjects in your game with a rigidbody
Therefore the only thing that can still cause FindNewContacts physics checks, are the rats with the colliders.

And I don't know the internal workings of a collider without a RigidBody, does the collider call that physics function, or the RigidBody?

[faint linden]

the rigidbody does

maybe idk

[nimble flume]

If that's true, your whole story makes no sense.

[faint linden]

how do i do the layer thing

[nimble flume]

Then there are rigidbodies somewhere

Add a Layer Rat, set the prefabs to Layer Rat, and ignore matrix Rat x Rat

Or make it Enemies

More generic

[faint linden]

where is ignore

[nimble flume]

https://docs.unity3d.com/Manual/LayerBasedCollision.html

In the Unity menu bar, go to Edit > Project Settings, then select the Physics category to open the Physics window.

[faint linden]

meow?

[nimble flume]

Meow

But your still playing

Don't know if that resets

[faint linden]

ill restart game

[nimble flume]

Yeah, some stuff resets while playing

[faint linden]

yeah u right

ill redo it

[rapid ore]

il be intrested if the Multithreading is helping

[nimble flume]

Going to take 10 minutes before hes at the lot's of enemies again

[rapid ore]

might be worth doing some test setup that allows you to skip to that palce

[nimble flume]

Totally agree

[faint linden]

rip

[nimble flume]

No idea then 🤷‍♂️

[faint linden]

unity bad

[nimble flume]

Not at all, like I said, you can make a bullet hell game with millions of bullets in Unity

This setup either does not work, or there is still something calling the physics system that you don't know of

[faint linden]

the middle chick has a rigid body but its only 1

[nimble flume]

Anyhow, you can try to make this in Unreal, see if it goes better

[faint linden]

i doubt it will

[nimble flume]

Or Godot

[faint linden]

im just kinda dissapointed

[nimble flume]

That's more inclined to 2D

[faint linden]

how do games like factorio exist with millions of entities

when unity cant even do like 200

[nimble flume]

You are constantly making that claim, it's not true.

[rapid ore]

have fun with that game in another game engine and your list of bad game engines will grow long fast

[nimble flume]

https://streamable.com/zojcj6
Here I have 78404 fully animated models in unity in 3D

That's way more heavy then the stuff you are currently doing. It's also a few thousand times more optimised

Don't say that unity can't handle 200 entities, it's simply not true

[faint linden]

so why cant it do mine

they are 2d and tiny and very simple

[nimble flume]

It's also a few thousand times more optimised

[faint linden]

how is it optimized

i have a thought

[nimble flume]

Well that's a really long story for this example and doesn't really matter for your physics problem.
But I have spend many hours looking through the profiler and optimising everything about this system. This was the best I could get out of it.
So you can do that too, just figure out what's causing your Physics calls. Disable the colliders from the enemies/your saw blades/your rigidbodies/w/e. Just look at it.
There is nothing I can do to help anymore. Good luck with it.

[faint linden]

my rats are being put on a spawn timer so the spawn timer continually decreases

what happens when the spawn timer is 0 or negative and its trying to spawn rats every frame

[nimble flume]

It's your code, you tell me

[faint linden]

what

[nimble flume]

I have no idea how you made your conditional check

[faint linden]

for what

[nimble flume]

The spawn timer...

[faint linden]

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class RatScript : MonoBehaviour {
    public Rat ratPrefab;
    public List<Rat> rats;
    float timer;
    public GameObject characterObject;
    public const float ratSpeed = 0.5f;
    private float spawnDelay = 2.5f;
    void Update() {
        timer += Time.deltaTime;
        if (timer >= spawnDelay) {
            timer -= (spawnDelay);
            spawnDelay *= 0.99f;
            Rat instantiatedRatLeft = Instantiate(ratPrefab);
            instantiatedRatLeft.transform.position = new Vector2(Random.Range(-20, -11), Random.Range(-11, 11));
            rats.Add(instantiatedRatLeft);
            Rat instantiatedRatRight = Instantiate(ratPrefab);
            instantiatedRatRight.transform.position = new Vector2(Random.Range(11, 20), Random.Range(-11, 11));
            rats.Add(instantiatedRatRight);
        }
        foreach (Rat rat in rats) {
            if (rat != null) {
                float dx = characterObject.transform.position.x - rat.gameObject.transform.position.x;
                float dy = characterObject.transform.position.y + 0.8f - rat.gameObject.transform.position.y;
                float t = Mathf.Rad2Deg * Mathf.Atan(dy / dx);
                if (dx < 0) {
                    t += 180;
                }
                rat.vx = ratSpeed * Mathf.Cos(Mathf.Deg2Rad * t);
                rat.vy = ratSpeed * Mathf.Sin(Mathf.Deg2Rad * t);
                rat.transform.Translate(new Vector2(rat.vx * Time.deltaTime, rat.vy * Time.deltaTime));
            }
        }
    }
}

[nimble flume]

So it spawns every frame then?

[faint linden]

eh i guess it wont ever actually be 0 or negative

but it might get close

[nimble flume]

I'm going to bed, cya around 👋

[faint linden]

so is that whats causing it?

[nimble flume]

This isn't a physics thing is it?

[faint linden]

no

[nimble flume]

And we concluded that your problem was a physics thing

[faint linden]

but we already established we cant find anything physics related

[nimble flume]

And your profiler said it is

So you are wrong, you just don't know why your wrong

[faint linden]

yes

the fps drops from 500 to 6

[nimble flume]

I understand what's happening, that's not the issue. You still haven't said to me what's making all those physics calls. You need to figure that out. I already gave you a few ideas how, good luck with it, I'm going to bed

[faint linden]

gn ty for the information

for anyone else seeing this post