oh ok so basically im trying to get an

[cerulean venture]

Why don't you just pass the underlying type? I.e. unsigned int?

[hardy meteor]

i haven't tried that, usually it wants it to be name specific or it gets upset, but that was for structs, not typedefs, so i suppose it might work, ill try that and report back, thanks!

[cerulean venture]

Please do report back. I'm curious about how that works too.

In case you're not aware, "int" and "unsigned int" are not standard sizes across languages (and not even within c++).

[hardy meteor]

huh that is fascinating, thanks

[hardy meteor]

sorry for taking a while, before i can even use the function that requires the uint i have to first get nvidia context working, and it is being a pain currently

keeps on giving me this error, which i cant seem to find any solutions to online

[coarse geyser]

Probably means that there's no corresponding method in the dll.

[hardy meteor]

that seems unlikely considering how it was used in the demo app in the flow github

although should there be any easy way of checking the methods a dll contains, i would happilly check

[coarse geyser]

Well, if you need further help, you'll have to share your code(at least where the error points) and the code of the demo app you're referring to. Or the source code of the dll.

[hardy meteor]

nvidia flow is closed source, but i can send the link to the github demo app they have

https://github.com/NVIDIAGameWorks/Flow/tree/master/demo/DemoApp

[coarse geyser]

might want to specify the relevant file code line too.

As well as share your own code

[hardy meteor]

ok sure

https://github.com/NVIDIAGameWorks/Flow/blob/master/demo/DemoApp/NvFlowInterop.h line 34 i believe

[coarse geyser]

The whole repository is in c/c++, so I'm not sure how you can use it as a reference for accessing methods in c#

[hardy meteor]

the methods they use are from the dll, so im hopeful that it can be used in c# using equivalent means

my code: ```csharp
[DllImport("NvFlowLibRelease_win64")]
extern static unsafe AppGraphCtx* AppGraphCtxCreate(int deviceID);

void Start()
{
NVIDIA.Initialize();
Debug.Log(NVIDIA.ChipsetInfo.DeviceId);
unsafe
{
my_app_graph = AppGraphCtxCreate(NVIDIA.ChipsetInfo.DeviceId);
}
}

the errors out on the my app graph line

any ideas?

[coarse geyser]

I can't see any "AppGraphCtxCreate" method being called in the file that you linked

[hardy meteor]

what do you mean?

it isnt being called sure

but it still is being existed there

[coarse geyser]

How do you know that?

[hardy meteor]

because of line 34

i think?

[coarse geyser]

where did you find that exact name "AppGraphCtxCreate"?

[hardy meteor]

line 34

[coarse geyser]

Don't see it there

NV_FLOW_API NvFlowContext* NvFlowInteropCreateContext(AppGraphCtx* appctx);

[hardy meteor]

oh whoops wrong one then

brb while i recheck where on earth it was

https://github.com/NVIDIAGameWorks/Flow/blob/master/demo/DemoApp/appGraphCtx.h line 41 sorry lol, sometimes i mix things up lol

any ideas?

[coarse geyser]

Hmm

[hardy meteor]

lol

i could always try older versions of nvidia flow incase the newest version for somereason doesn't have the functions?

[coarse geyser]

try

[DllImport("NvFlowLibRelease_win64.dll")]

?🤔

Not sure if that's the issue

[hardy meteor]

oh ok ill try that, brb!

[hardy meteor]

gives me the same error as usual

weird

[coarse geyser]

Might want to check the things mentioned here
https://docs.microsoft.com/en-us/dotnet/api/system.entrypointnotfoundexception?view=net-6.0

Also...

[hardy meteor]

checked arround there, couldn't get anything there working

althoug the dumpbin was interesting, as it showed no decorated function names

weird

just regular

ill send it here brb

there

[coarse geyser]

Maybe it's the AppGraphCtx definition...🤔

What if you just use int for the return type?

[hardy meteor]

how so?

[hardy meteor]

oh, ok ill try that

i am also in the process of making noodles, so if my replies are late i apologise

[hardy meteor]

still errors

[coarse geyser]

Welp no clue then. Honestly I don't have that much experience with using C dlls in C#

[hardy meteor]

i believe it to be a c++ dll personally, but it is ok, thanks for trying though!

[coarse geyser]

From this dump it doesn't seem like there's a method that you're trying to call

[hardy meteor]

oh, that is interesting then... but why in the demo app does it use it?

[coarse geyser]

Donno. This "C" might indicate that the library is in C. Not 100% sure though
#define NV_FLOW_API extern "C" __declspec(dllexport)

[coarse geyser]

No clue.

Maybe that's from a different library?

[hardy meteor]

nah, the extern c stuff is to stop mangling of parameters during interop

[hardy meteor]

perhaps, ill look around and see if i can see any other imports

as i dont think i can really go without this function, as almost all nvidia flow functions require nvidia flow context, to create context you need app graph ctx

weird, i do wonder how the many app's that use nv flow managed to create context then...

perhaps i could find the code they use to interface with nv flow?

[coarse geyser]

Do you have any example of apps written in C#? It seems to be way more compatible with unreal/C++.

[hardy meteor]

unfortunately i do not

[coarse geyser]

Looking at this file makes me think, that there's a lot more to it than just importing the AppGraphCtxCreate function.
https://github.com/NVIDIAGameWorks/Flow/blob/master/demo/DemoApp/appGraphCtxLoaderGenerated.h

[hardy meteor]

perhaps

really wish unity had a better way of interacting with dll's, but i suppose it is more to do with c# than unity

[coarse geyser]

Might as well write your own liquid simulation at this point hahah

[hardy meteor]

lol, so much math though lol, id rather deal with the pain of interop than deal with math and physics lol

perhaps i can find some other fluid simulation api that has better documentation, that i can try get working with unity

[hardy meteor]

google has some fascinating ones, although almost all are in js

[hardy meteor]

sorry for late reply, but after enough trial and error i can confirm that just passing uint in seems to work fine, thanks so much!

[cerulean venture]

Neat!