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Flecs.NET

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MIT Nuget (with prereleases)

Docs · Examples · Discord

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Flecs.NET is a high-level wrapper for flecs. Low-level bindings to the C api are included and generated with Bindgen.NET. Native libraries are cross-compiled with Vezel-Dev's Zig Toolsets.

Show me the code!

// Copy, paste, and run in a .NET project!

using Flecs.NET.Core;

using World ecs = World.Create();

Entity entity = ecs.Entity()
    .Set(new Position(10, 20))
    .Set(new Velocity(1, 2));

ecs.Each((ref Position p, ref Velocity v) =>
{
    p.X += v.X;
    p.Y += v.Y;
});

public record struct Position(float X, float Y);
public record struct Velocity(float X, float Y);

Overview

Flecs.NET - High-level C# port of the C++ wrapper

Flecs.NET.Bindings - Low-level bindings of the C API

Flecs.NET.Native - Precompiled native libraries

NuGet

You can download the nuget package and use Flecs.NET right away!

Flecs.NET (Wrapper + Bindings + Native Libraries): Release | Debug

dotnet add PROJECT package Flecs.NET.Release --version *-*

Flecs.NET.Bindings (Bindings + Native Libraries): Release | Debug

dotnet add PROJECT package Flecs.NET.Bindings.Release --version *-*

Flecs.NET.Native (Native Libraries): Release | Debug

dotnet add PROJECT package Flecs.NET.Native.Release --version *-*

Flecs.NET provides both release and debug packages for nuget. To include both of them in your project based on your build configuration, use the package references below. The latest stable or prerelease versions will be added to your project.

<Project Sdk="Microsoft.NET.Sdk">

    <PropertyGroup>
        <OutputType>Exe</OutputType>
        <TargetFramework>net7.0</TargetFramework>
    </PropertyGroup>

    <ItemGroup>
        <PackageReference Include="Flecs.NET.Debug" Version="*-*" Condition="'$(Configuration)' == 'Debug'" />
        <PackageReference Include="Flecs.NET.Release" Version="*-*" Condition="'$(Configuration)' == 'Release'" />
    </ItemGroup>

</Project>

GitLab Package Registry

For more up-to-date packages, development builds are available on the GitLab package registry. To add the development feed to your project, add the GitLab link below as a restore source. You can now reference any package version listed here!

<Project Sdk="Microsoft.NET.Sdk">

    <PropertyGroup>
        <OutputType>Exe</OutputType>
        <TargetFramework>net7.0</TargetFramework>
        <RestoreAdditionalProjectSources>https://gitlab.com/api/v4/projects/51698729/packages/nuget/index.json</RestoreAdditionalProjectSources>
    </PropertyGroup>

    <ItemGroup>
        <PackageReference Include="Flecs.NET.Debug" Version="3.2.8-dev-2023-10-30-11-06-14"/>
    </ItemGroup>

</Project>

[!WARNING] Development feed packages may be deleted without warning to free up space.

Unity Package Manager

The Flecs.NET Unity Package is hosted on github and can be downloaded using the URL below.

https://github.com/BeanCheeseBurrito/Flecs.NET.Unity.git

[!NOTE] Only Windows, MacOS, and Linux builds on x64 Mono are supported. IL2CPP, web, and mobile support are planned for the future.

[!Caution] The Unity package is incomplete and will be dropped in a future version. Flecs.NET is not recommended to be used with the Unity game engine.

Running examples

To run any of the example programs, use dotnet runand set the "Example" property to the example's path relative to the Flecs.NET.Examples project. Each level of the path must be separated by an underscore.

Example:

dotnet run --project src/Flecs.NET.Examples --property:Example=Entities_Basics

Building from source

Clone the repo

Clone the repo and it's submodules.

git clone --recursive https://github.com/BeanCheeseBurrito/Flecs.NET.git
cd Flecs.NET

Restore dependencies

Run the following command on the solution to restore all project dependencies.

dotnet restore

Generate bindings

Generate the binding code. Bindings are generated with Bindgen.NET.

[!NOTE] The binding generator needs access to system headers on MacOS. Ensure that XCode is installed.

dotnet run --project src/Flecs.NET.Bindgen

Build Flecs.NET

Compile the wrapper and native libraries. The zig compiler will automatically be downloaded and cached in your local nuget package folder. Native libraries will be cross-compiled for linux, macos, and windows.

dotnet build

Reference the project

Reference the project and import the native libraries.

<Project Sdk="Microsoft.NET.Sdk">

    <PropertyGroup>
        <OutputType>Exe</OutputType>
        <TargetFramework>net7.0</TargetFramework>
    </PropertyGroup>

    <Import Project="PATH/Flecs.NET/src/Flecs.NET.Native/Flecs.NET.Native.targets" />

    <ItemGroup>
        <ProjectReference Include="PATH/Flecs.NET/src/Flecs.NET/Flecs.NET.csproj" />
    </ItemGroup>

</Project>

Contributing

Feel free to open an issue or pull request. All contributions are welcome!

Ways to contribute: