Hyperion Engine is licensed under the MIT License (see LICENSE). Binary releases also include the third-party components below. Full license texts are in Licenses/, or Documentation/ThirdPartyLicenses/ in the source repository.
| Component | License | Copyright | Text |
|---|---|---|---|
| Jolt Physics | MIT | Copyright 2021 Jorrit Rouwe | JoltPhysics.txt |
| meshoptimizer | MIT | Copyright (c) 2016-2026 Arseny Kapoulkine | meshoptimizer.txt |
| xatlas | MIT | Copyright (c) 2018-2020 Jonathan Young | xatlas.txt |
| thekla_atlas (in xatlas) | MIT | Copyright (c) 2013 Thekla, Inc; Copyright NVIDIA Corporation 2006 - Ignacio Castano | xatlas.txt |
| Fast-BVH (in xatlas) | MIT | Copyright (c) 2012 Brandon Pelfrey | xatlas.txt |
| OpenNL (in xatlas) | BSD-3-Clause | Copyright (c) 2004-2010, Bruno Levy | xatlas.txt |
| V-HACD | BSD-3-Clause | Copyright (c) 2011 Khaled Mamou | V-HACD.txt |
| cgltf | MIT | Copyright (c) 2018-2021 Johannes Kuhlmann | cgltf.txt |
| stb_image, stb_image_resize, stb_image_write | MIT or Unlicense | Copyright (c) 2017 Sean Barrett | stb.txt |
| TLSF | BSD-3-Clause | Copyright (c) 2006-2016, Matthew Conte | tlsf.txt |
| D3D12 Memory Allocator | MIT | Copyright (c) 2019-2025 Advanced Micro Devices, Inc. | D3D12MemoryAllocator.txt |
| DirectX-Headers | MIT | Copyright (c) Microsoft Corporation | DirectX-Headers.txt |
LLVM (LLVM-C.dll) |
Apache-2.0 WITH LLVM-exception | The LLVM Project contributors | LLVM-Apache-2.0-with-LLVM-exception.txt |
DirectX Shader Compiler (dxcompiler.dll) |
NCSA | Copyright (c) 2003-2015 University of Illinois at Urbana-Champaign; Copyright (c) Microsoft Corporation | DirectXShaderCompiler.txt |
OpenAL Soft (OpenAL32.dll) |
LGPL-2.0-or-later | The OpenAL Soft authors | openal-soft.txt |
| {fmt} | MIT | Copyright (c) 2012 - present, Victor Zverovich and {fmt} contributors | fmt.txt |
| FreeType | FTL | The FreeType Project | freetype.txt |
| libpng | libpng-2.0 | Copyright (c) 1995-2025 The PNG Reference Library Authors | libpng.txt |
| zlib | Zlib | (C) 1995-2022 Jean-loup Gailly and Mark Adler | zlib.txt |
| bzip2 | bzip2-1.0.6 | Copyright (C) 1996-2019 Julian R Seward | bzip2.txt |
| Brotli | MIT | Copyright (c) 2009, 2010, 2013-2016 by the Brotli Authors | brotli.txt |
| brotli-dec-wasm (web builds) | MIT or Apache-2.0 | Copyright (c) 2026 Yulong Ming | brotli-dec-wasm.txt |
| curl | curl | Copyright (c) 1996 - 2025, Daniel Stenberg and contributors | curl.txt |
| Microsoft Visual C++ Runtime | Microsoft redistributable | Copyright (c) Microsoft Corporation | |
| Avalonia | MIT | Copyright 2013-2026 (c) The AvaloniaUI Project | MIT-NuGet-packages.txt |
| Dock | MIT | Copyright (c) Wiesław Šoltés 2026 | MIT-NuGet-packages.txt |
| DynamicData | MIT | Copyright (c) Roland Pheasant 2011-2026 | MIT-NuGet-packages.txt |
| MicroCom.Runtime | MIT | Copyright 2021 (c) Nikita Tsukanov | MIT-NuGet-packages.txt |
| System.Reactive | MIT | Copyright (c) .NET Foundation and Contributors | MIT-NuGet-packages.txt |
| Tmds.DBus.Protocol | MIT | Tom Deseyn | MIT-NuGet-packages.txt |
| Newtonsoft.Json | MIT | Copyright (c) 2007 James Newton-King | Newtonsoft.Json.txt |
| SkiaSharp | MIT | Copyright (c) Microsoft Corporation | SkiaSharp.txt |
| HarfBuzzSharp | MIT | Copyright (c) Microsoft Corporation | HarfBuzzSharp.txt |
ANGLE (av_libglesv2.dll) |
BSD-3-Clause | Copyright 2018 The ANGLE Project Authors | ANGLE.txt |
| Inter typeface | OFL-1.1 | Copyright (c) 2016 The Inter Project Authors | Inter-OFL-1.1.txt |
| Codicons | CC-BY-4.0 | Copyright (c) Microsoft Corporation | Codicons-CC-BY-4.0.txt |
| Material Icons, Material Symbols | Apache-2.0 | Copyright (c) Google | Apache-2.0.txt |
| Asset | License | Author | Text |
|---|---|---|---|
| Base Mesh T Pose FBX (ThirdPersonCharacter model) | CC-BY-4.0 | iamnuffy | BaseMesh-T-Pose-CC-BY-4.0.txt |
Base Mesh T Pose FBX: "Base Mesh T Pose FBX" by iamnuffy, licensed under CC BY 4.0. Modified: rescaled and reoriented, skeleton bones renamed, given a plain material, and animated with retargeted clips.
FreeType: Portions of this software are copyright (c) 2024 The FreeType Project (www.freetype.org). All rights reserved.
OpenAL Soft: OpenAL32.dll is dynamically linked and built from OpenAL Soft 1.24.3 (https://github.com/kcat/openal-soft) by the vcpkg openal-soft port, which applies the patches devendor-fmt.diff and pkgconfig-cxx.diff. You may replace it with your own build of a compatible version.
LTC: Eric Heitz, Jonathan Dupuy, Stephen Hill and David Neubelt. Real-Time Polygonal-Light Shading with Linearly Transformed Cosines. ACM Transactions on Graphics (Proceedings of ACM SIGGRAPH 2016) 35(4), 2016.