| # Header only C++ tiny glTF library(loader/saver). |
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| `TinyGLTF` is a header only C++11 glTF 2.0 https://github.com/KhronosGroup/glTF library. |
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| ## Status |
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| Work in process(`devel` branch). Very near to release, but need more tests and examples. |
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| `TinyGLTF` uses Niels Lohmann's json library(https://github.com/nlohmann/json), so now it requires C++11 compiler. |
| If you are looking for old, C++03 version, please use `devel-picojson` branch. |
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| ## Builds |
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| [](https://travis-ci.org/syoyo/tinygltf) |
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| [](https://ci.appveyor.com/project/syoyo/tinygltf) |
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| ## Features |
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| * Written in portable C++. C++-11 with STL dependency only. |
| * [x] macOS + clang(LLVM) |
| * [x] iOS + clang |
| * [x] Linux + gcc/clang |
| * [x] Windows + MinGW |
| * [x] Windows + Visual Studio 2015 or later. |
| * Visual Studio 2013 is not supported since they have limited C++11 support and failed to compile `json.hpp`. |
| * [x] Android + CrystaX(NDK drop-in replacement) GCC |
| * [x] Web using Emscripten(LLVM) |
| * Moderate parsing time and memory consumption. |
| * glTF specification v2.0.0 |
| * [x] ASCII glTF |
| * [x] Binary glTF(GLB) |
| * [x] PBR material description |
| * Buffers |
| * [x] Parse BASE64 encoded embedded buffer fata(DataURI). |
| * [x] Load `.bin` file. |
| * Image(Using stb_image) |
| * [x] Parse BASE64 encoded embedded image fata(DataURI). |
| * [x] Load external image file. |
| * [x] PNG(8bit only) |
| * [x] JPEG(8bit only) |
| * [x] BMP |
| * [x] GIF |
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| ## Examples |
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| * [glview](examples/glview) : Simple glTF geometry viewer. |
| * [validator](examples/validator) : Simple glTF validator with JSON schema. |
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| ## Projects using TinyGLTF |
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| * Physical based rendering with Vulkan using glTF 2.0 models https://github.com/SaschaWillems/Vulkan-glTF-PBR |
| * GLTF loader plugin for OGRE 2.1. Support for PBR materials via HLMS/PBS https://github.com/Ybalrid/Ogre_glTF |
| * [TinyGltfImporter](http://doc.magnum.graphics/magnum/classMagnum_1_1Trade_1_1TinyGltfImporter.html) plugin for [Magnum](https://github.com/mosra/magnum), a lightweight and modular C++11/C++14 graphics middleware for games and data visualization. |
| * Your projects here! (Please send PR) |
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| ## TODOs |
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| * [ ] Write C++ code generator from jSON schema for robust parsing. |
| * [x] Serialization |
| * [ ] Compression/decompression(Open3DGC, etc) |
| * [ ] Support `extensions` and `extras` property |
| * [ ] HDR image? |
| * [ ] OpenEXR extension through TinyEXR. |
| * [ ] Write tests for `animation` and `skin` |
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| ## Licenses |
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| TinyGLTF is licensed under MIT license. |
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| TinyGLTF uses the following third party libraries. |
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| * json.hpp : Copyright (c) 2013-2017 Niels Lohmann. MIT license. |
| * base64 : Copyright (C) 2004-2008 René Nyffenegger |
| * stb_image.h : v2.08 - public domain image loader - [Github link](https://github.com/nothings/stb/blob/master/stb_image.h) |
| * stb_image_write.h : v1.09 - public domain image writer - [Github link](https://github.com/nothings/stb/blob/master/stb_image_write.h) |
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| ## Build and example |
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| Copy `stb_image.h`, `stb_image_write.h`, `json.hpp` and `tiny_gltf.h` to your project. |
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| ### Loading glTF 2.0 model |
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| ```c++ |
| // Define these only in *one* .cc file. |
| #define TINYGLTF_IMPLEMENTATION |
| #define STB_IMAGE_IMPLEMENTATION |
| #define STB_IMAGE_WRITE_IMPLEMENTATION |
| // #define TINYGLTF_NOEXCEPTION // optional. disable exception handling. |
| #include "tiny_gltf.h" |
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| using namespace tinygltf; |
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| Model model; |
| TinyGLTF loader; |
| std::string err; |
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| bool ret = loader.LoadASCIIFromFile(&model, &err, argv[1]); |
| //bool ret = loader.LoadBinaryFromFile(&model, &err, argv[1]); // for binary glTF(.glb) |
| if (!err.empty()) { |
| printf("Err: %s\n", err.c_str()); |
| } |
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| if (!ret) { |
| printf("Failed to parse glTF\n"); |
| return -1; |
| } |
| ``` |
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| ## Compile options |
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| * `TINYGLTF_NOEXCEPTION` : Disable C++ exception in JSON parsing. You can use `-fno-exceptions` or by defining the symbol `JSON_NOEXCEPTION` and `TINYGLTF_NOEXCEPTION` to fully remove C++ exception codes when compiling TinyGLTF. |
| * `TINYGLTF_NO_STB_IMAGE` : Do not load images with stb_image. Instead use `TinyGLTF::SetImageLoader(LoadimageDataFunction LoadImageData, void *user_data)` to set a callback for loading images. |
| * `TINYGLTF_NO_STB_IMAGE_WRITE` : Do not write images with stb_image_write. Instead use `TinyGLTF::SetImageWriter(WriteimageDataFunction WriteImageData, void *user_data)` to set a callback for writing images. |
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| ### Saving gltTF 2.0 model |
| * [ ] Buffers. |
| * [x] To file |
| * [x] Embedded |
| * [ ] Draco compressed? |
| * [x] Images |
| * [x] To file |
| * [x] Embedded |
| * [ ] Binary(.glb) |
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| ## Running tests. |
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| ### glTF parsing test |
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| #### Setup |
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| Python 2.6 or 2.7 required. |
| Git clone https://github.com/KhronosGroup/glTF-Sample-Models to your local dir. |
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| #### Run parsing test |
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| After building `loader_example`, edit `test_runner.py`, then, |
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| ```bash |
| $ python test_runner.py |
| ``` |
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| ### Unit tests |
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| ```bash |
| $ cd tests |
| $ make |
| $ ./tester |
| $ ./tester_noexcept |
| ``` |
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| ## Third party licenses |
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| * json.hpp : Licensed under the MIT License <http://opensource.org/licenses/MIT>. Copyright (c) 2013-2017 Niels Lohmann <http://nlohmann.me>. |
| * stb_image : Public domain. |
| * catch : Copyright (c) 2012 Two Blue Cubes Ltd. All rights reserved. Distributed under the Boost Software License, Version 1.0. |
