Issue creating a c++ script fx node with multiples .h files

[Papours]

Hi everyone !

This week I tried to make my first c++ node for script fx following this tutorial.

The main difference between the final script in the tutorial and mine is that my filter is in another c++ file.
In visual studio (in \DspNetworks\Binaries\Builds\VisualStudio2022), I added an external dependency to my file and it worked great !
I managed to make my node and to use it inside hise.

I made a small hise app using my node and first tried to export it as a standalone app : I had a linker error saying that my external file was not found.

I later found that there is another visual studio project file in \Binaries\Builds\VisualStudio2022. I added my dependency to that project and I managed to build the standalone app by generating it from visual studio.

Next I wanted to export it as a VST, so I did the same thing, had the same linker issue and resolved it the same way. However, when I tried to generate the VST from visual studio, it only re-generated the standalone app (I think ?).

I searched if there was a folder dedicated to external cpp files but I couldn't find any answer.

So, how can I create my VST ?
Am I missing something with the external dependencies ?

Thanks ^^

[HISEnberg]

@Papours If I am following you correctly, the Binaries folder is the wrong place to store any of your external C++ code. The binary gets rewritten often (each time you compile the FX within HISE), so this is going to lead to issues down the line.

So let's say you have a dependency file filters.cpp that is included in your C++ node header (let's call it filters.h). You can either create a a new folder or location for the filters.cpp, or even simpler is to place it in: ProjectName\DspNetworks\ThirdParty\src.

After you do that delete the Binaries folder and recompile your FX nodes.

[Papours]

@HISEnberg Hi, thanks for the quick response !

My filter was indeed inside ProjectName\DspNetworks\ThirdParty\src and I had a reference to it in my node header.
I'm not sure if my first post was clear so here is a step by step to reproduce my issue :

• Create a new hise project
• Create c++ third party node template
• Compile DPS node as dll
• Create a src folder in thirdParty
• Create test_filter.cpp and test_filter.h

// .cpp
#include "test_filter.h"

namespace TestFilter
{
	Test::Test(float param){
			test_float = param;
		}
}

/// .h
namespace TestFilter {
	class Test {
	public:
		float test_float;

		Test(float param);
	};
}

• Inside the template, add #include "src/test_filter.h" at the beginning and TestFilter::Test t(0.5); in prepare

Now if I try to build inside visual studio code I get a linker error saying that it can't find the definition of my constructor.
If I add the dependency to test.h and test.cpp, it works, but only once, and if I retry to compile the dps network as dll I have to re-add the filters to my dependencies.

And if I go back to hise and try to export as a standalone app, I have the linker error again.

I hope this make my issue more clear and sorry if it wasn't on my first message