Basic Draco C# bindings.

Basic usage:

Draco.Mesh mesh = Draco.Decompress(compressedData, compressedDataSize);

for(UInt32 aitribI = 0; attribI < mesh.numAttributes; attribI++)
{
    Attribute attrib = mesh.GetAttribute(attribI);

    Draco.Data data = Draco.GetData(mesh, attrib);
    if(data.dataType == DataType.DT_FLOAT32)
    {
        var verts = (float*)data.data;
        for(UInt32 vertI = 0; vertI < mesh.numVertices; vertI++)
        {
            for(UInt compI = 0; compI < attrib.numComponents; compI++)
            {
                // ...
            }
        }
    }
    
    Draco.Release(data);
}

Draco.Release(mesh);

How to Build

Build Native Libraries

Native libraries are built from our fork of the draco library.

Download the repo

git clone https://github.com/EvergineTeam/draco.git
cd draco

Build for windows and UWP

You need:

• Python3
• CMake
• Visual Studio C++

Just run the build.py script

python build.py

Build for Wasm

You need:

• Python3
• CMake
• Emscripten SDK
• Ninja

Run the build.py script, and provide the path to the Emscripten SDK:

python build.py --emscripten_sdk C:/APPS/emsdk

NOTE: Unlike in other platforms, in Wasm, we need to use a static library. Emscripten doesn't have good support for shared libraries and performance is much worse.

Build for Android

You need:

• Python3
• CMake
• Android NDK
• Ninja

Run the build.py script, and provide the path to the Android NDK:

python build.py --android_ndk C:/APPS/android-ndk-r26d

Compile for all platforms

If you can compile all platforms with a single cmd:

python build.py --emscripten_sdk C:/APPS/emsdk --android_ndk C:/APPS/android-ndk-r26d

Build nuget

You will find all the compiled libraries in the "build/OUT" folder.

Copy the contents of "build/OUT" to this repo inside "Evergine.Bindings.Draco".

Run the Generate-Nugets.ps1 script.

There is also a github Action for publishing the nuget to .

Using the nuget in your project

Just add the nuget dependency to your project.

NOTE: for Wasm, you will also need to add the dependency to the .Web project! This is because the static library needs to be linked to the executable (not to a dll).