C# bindings

[weianweigan]

c# bindings 💻

Hello everyone, Manifold is a awsome library.
I am a C# developer and often develop plugins for CAD software. It would be fantastic if ManifoldCAD could be integrated into these design and manufacturing software. For industrial software like Solidworks, AutoCAD, Revit, etc., C# is a mainstream language for plugin development. Therefore, I am creating C# bindings and released an alpha version of a NuGet package for seamless integration into these 3D CAD software.
Hope this is helpful for C# developers.
This is the repository address and introduction file that I forked.

Integrating with other 3D software. ⚙️

I have already tried integrating Manifold with Autodesk Revit, and it works fine. If you also want to integrate Manifold into 3D CAD software, you can give it a try.

c# notebooks 📓

I attempted to use the C# version of notebook to test and validate the manifold. I found that it is feasible, so I created a NuGet package. You can try using the C# notebook in VS Code to generate some models for quick validation.

c# notebooks for manifold

It seems that 3D models cannot be viewed on GitHub, but they can be previewed in VS Code after they are generated.

[elalish]

Awesome, thanks for sharing! We should add this to our README too, right next to the Java bindings.

[edumarzolla]

Please help me!!!!

I'm already trying to solve during the last 48 hours on your wonferful ManifoldNET.Meshio nuget lib...
Everything was working fine since you implemented the ManifoldNET... probably after a windows update, the code stops here:

            Manifold cylinder1= Manifold.Cylinder((float)(10), (float)(5/ 2), (float)(5/ 2), 360, true);
            Manifold cylinder2= Manifold.Cylinder((float)(11), (float)(3 / 2), (float)(3 / 2), 360, true);
            Manifold result = Manifold.BooleanOperation(cylinder1, cylinder2, BoolOperationType.Subtract);   (the code stoped here at the Boolean operation line, with the following error)

System.AccessViolationException
HResult=0x80004003
Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Source=
StackTrace:

'Posibras-Came.exe' (CoreCLR: clrhost): Loaded 'C:\Users\admin\My Drive\aPosibras (1)\Calculo de came\Posibras_C\Posibras_C_1.1.79\Posibras-Nuget\Posibras-Came\bin\Debug\net8.0-windows7.0\ManifoldNET.dll'.
An unhandled exception of type 'System.AccessViolationException' occurred in ManifoldNET.dll
Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

'Posibras-Came.exe' (CoreCLR: clrhost): Loaded 'C:\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\PrivateAssemblies\Runtime\Microsoft.VisualStudio.Debugger.Runtime.NetCoreApp.dll'.
The program '[19940] Posibras-Came.exe' has exited with code 4294967295 (0xffffffff).

The exactly same code is running OK in other PC, with same Windows11 sysop, same VS2022 with the same installation. I already tryed to format the PC and install abrand new Windows11 with new VS2022 C#

I am getting crazy because I cannot understand what is happening...

Could you please help me with this crazy issue?

Thanks!!

Eduardo
+5511 966974533 (whatsapp)

[elalish]

I have no idea, nor a windows machine to repro on. Hopefully @weianweigan has some ideas. I'm guessing this goes through our C bindings? Perhaps a problem there - C memory management is easy to get wrong.

[weianweigan]

@edumarzolla I didn't reproduce this error using nuget: ManifoldNET.MeshIO 1.0.7-alpha. Could you provide the version of the nuget package you are using?
Additionally, you should pay attention to the issue of floating-point type conversion.

[pca006132]

probably @edumarzolla

[weianweigan]

@pca006132 Thanks！

[edumarzolla]

Fantastic!!!!! How to keep nuget updated with manifold new evolutions? Thanks

…

On Fri, Aug 16, 2024, 01:03 Emmett Lalish ***@***.***> wrote: Awesome, thanks for sharing! We should add this to our README too, right next to the Java bindings. — Reply to this email directly, view it on GitHub <#900 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABBLB2TRQV3XSLBCSQN5IITZRV2XNAVCNFSM6AAAAABMTIA6HWVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTAMZVGQ2DKOA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[weianweigan]

I added a GitHub action to push the NuGet package. The C# code is located in the /bindings/csharp directory. If Manifold didn't make any breaking changes, simply syncing the forked repos with the Manifold repos work, and then trigger GitHub workflow should works.

[edumarzolla]

If I understand correctly: - ManifoldNET is the Manifold without Meshio - ManifoldNET.Meshio is the Manifold with Meshio - ManifoldNET.Noteooks is the Manifold with Meshio and visualization screen Do you have an example of ManifoldNET.Notebooks C# code? Thanks! Eduardo +5511 966974533 (whatsapp) Em sex., 16 de ago. de 2024 às 04:00, dududu ***@***.***> escreveu:

…

I added a GitHub action <https://github.com/weianweigan/manifold-csharp/blob/dev-csharp/.github/workflows/nuget.yml> to push the NuGet package. The C# code is located in the /bindings/csharp directory. If Manifold didn't make any breaking changes, simply syncing the forked repos with the Manifold repos work, and then trigger GitHub workflow should works. — Reply to this email directly, view it on GitHub <#900 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABBLB2U2O5IPRYO45HJ3F2TZRWPSTAVCNFSM6AAAAABMTIA6HWVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTAMZVGU2DENI> . You are receiving this because you commented.Message ID: ***@***.***>

[weianweigan]

It's right. Notebooks sample here. If you want to use it in a WinForms application, ManifoldNET.MeshIO is recommended.

About notebook, you need vs code and polyglot notebooks extension installed.

[edumarzolla]

Great!
I developed a code in C# that creates a solid using compiled Manifold DLL.
How to visualize the solid in a WindowsForm in c# (Visual Studio 2022, not VS code)
Thanks

[weianweigan]

@edumarzolla Try helix-toolit. It may be necessary to place a WPF control inside a WinForm. Webview may be another option.

[weianweigan]

helix-toolkit example which load glb file here.

[edumarzolla]

Hi,
When you created the nuget pack, have you compiled the dll with TBB (parallel processing) standards?
Asking that because when I running multiple boolean operations, it is take long time, and the process graph (task manager) is not showing all CPUs processing

Thanks

[edumarzolla]

I replaced the manifoldc.dll file from the nuget folder with a manifoldc.dll that I compiled with TBB, and the result was 10 times faster. I made a backup before. Compare the size of files... [image: image.png] Em sex., 16 de ago. de 2024 às 12:14, dududu ***@***.***> escreveu:

…

helix-toolkit example which load glb file here <https://github.com/helix-toolkit/helix-toolkit/tree/develop/Source/Examples/WPF/ExampleBrowser/Examples/ModelViewer> . — Reply to this email directly, view it on GitHub <#900 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABBLB2XUEKB3IB6T7EWX4QTZRYJM5AVCNFSM6AAAAABMTIA6HWVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTAMZWGAZDQOA> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[weianweigan]

@edumarzolla Thank you for pointing that out. I compiled Manifold in GitHub Action, but TBB is not enabled yet.

[edumarzolla]

Please see the attached document that I created for compiling it with TBB. Em qui., 22 de ago. de 2024 às 22:55, dududu ***@***.***> escreveu:

…

@edumarzolla <https://github.com/edumarzolla> Thank you for pointing that out. I compiled Manifold in GitHub Action, but TBB is not enabled yet. — Reply to this email directly, view it on GitHub <#900 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABBLB2RQYY2Q74XEGO7IWMTZS2JAXAVCNFSM6AAAAABMTIA6HWVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANBSGUYTMOA> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[weianweigan]

@edumarzolla I didn't see the attached document, possibly because you replied directly from the email.

[edumarzolla]

@weianweigan
How to compile Manifold DLL in VS2022.docx

[weianweigan]

@edumarzolla Thanks! I compiled with tbb option on and released new version 1.0.7-alpha. It contains tbb12.dll in runtimes folder. I run all test and passed, it seems faster.

[edumarzolla]

Wonderful!!! I will test it tomorrow, now is Sunday 11pm in São paulo/Brazil. I miss a visualizer for c# windows form apps, for me, if your lib could add a toolbox for visualizing, it will get still better!! Thanks

…

On Sun, Aug 25, 2024, 11:41 dududu ***@***.***> wrote: @edumarzolla <https://github.com/edumarzolla> Thanks! I compiled with tbb option on and released new version 1.0.7-alpha <https://www.nuget.org/packages/ManifoldNET.MeshIO/1.0.7-alpha>. It contains tbb12.dll in runtimes folder. I run all test and passed, it seems faster. — Reply to this email directly, view it on GitHub <#900 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABBLB2QENEAVQPFWF4A5CCDZTHULLAVCNFSM6AAAAABMTIA6HWVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANBUGMZDMMQ> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[weianweigan]

@edumarzolla Great! Hope the test goes smoothly. NanJing/China is now 10:30 am. I had a library for Visualization based on wpf and it had an example about how to intergate with manifold-csharp. It also can be used in winform by elementhost.

[reinux]

This is awesome. I was wondering about exactly this just last month. The timing couldn't be better. Thanks!

I have an idea for a pet project translating OpenSCAD files to F#.

[elalish]

Nice, and in case it's helpful: cookiecad/Openscad-to-JSCAD-converter#10

[reinux]

That is indeed helpful. Thanks!

[elalish]

@weianweigan @edumarzolla @reinux I'm taking a wild guess some of you may be Windows users? We just hit a strange error on our Windows CI, tracked by #910 - the problem is neither @pca006132 nor I have a Windows box and the error is completely obtuse. You should be able to repro if you pull master and run manifold_test.exe --gtest_filter=Polygon.Zebra or Zebra3. If any of you can repro, any info you can give us to help narrow down the problem would be a huge help. Thanks!

[weianweigan]

@reinux Please note that the C# bindings for Manifold have not yet included binaries for Linux and macOS. Currently, I have only compiled the Windows version.

[reinux]

@weianweigan I was actually able to get it working with fairly little effort just using the flake.nix from @elalish 's original repo, save for a minor nuance which I noted in #909 . I think on Ubuntu and others, it should suffice to use the package manager.

Otherwise, the only wrinkle was with loading extension.dib in an F# notebook, but the workaround to that is simply to #r it in both a C# cell and an F# cell. I'll open an issue on your fork if you'd like.

Very, very cool!

[weianweigan]

@reinux Thanks! I extended the notebook's functionality using this tutorial. I suspect that the notebook generates two separate projects in a temporary directory for C# and F# to support running scripts, which is why they can't share the package. I'd be happy for you to open an issue, but I’m not sure how to fix it.

[reinux]

@weianweigan Yeah, I'm not sure either, which is why I've been a bit reluctant. I guess it wouldn't hurt to leave it open for now. Maybe someone will come along who has experience with this.

[weianweigan]

Yeah, but I tend to think this might be an issue with the notebook itself.

[edumarzolla]

Ok, I'll check it out tomorrow.

…

On Tue, Sep 3, 2024, 14:25 Emmett Lalish ***@***.***> wrote: @weianweigan <https://github.com/weianweigan> @edumarzolla <https://github.com/edumarzolla> @reinux <https://github.com/reinux> I'm taking a wild guess some of you may be Windows users? We just hit a strange error on our Windows CI, tracked by #910 <#910> - the problem is neither @pca006132 <https://github.com/pca006132> nor I have a Windows box and the error is completely obtuse. You should be able to repro if you pull master and run manifold_test.exe --gtest_filter=Polygon.Zebra or Zebra3. If any of you can repro, any info you can give us to help narrow down the problem would be a huge help. Thanks! — Reply to this email directly, view it on GitHub <#900 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABBLB2UAGJQDV2DKHMHVCKTZUXWHTAVCNFSM6AAAAABMTIA6HWVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANJTGQ4TKOA> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[pca006132]

Thanks, but I think the issue is now fixed so no need to check now.

[pca006132]

Hi, I wonder if you can change the C# binding to an out-of-tree build, and depends on the C bindings. We will be releasing v3.0, we can add the link to your repository.

[weianweigan]

Thanks for adding the C# binding link.

The C# binding code is currently in the /bindings/csharp folder in my forked repository, and there's also a nuget.yml file in the /.github/workflows directory. The C# binding depends on the C binding and does not modify the source code of Manifold. I'm not proficient in CMake. What exactly does "out-of-tree build" refer to in this context? Does it mean I need to include the Manifold repository as a submodule?

[pca006132]

Oh, by out-of-tree I just mean you can build your binding without modification to the manifold source code, i.e. no extra C bindings needed. It seems that this is the case, so everything is fine :)