commit	098dfee98209aa1a447c7f7f65123f7e53b4d0c3	[log] [tgz]
author	Syoyo Fujita <syoyo@lighttransport.com>	Tue Aug 28 21:33:07 2018 +0900
committer	GitHub <noreply@github.com>	Tue Aug 28 21:33:07 2018 +0900
tree	3b50a063997200d13e6e0e6db82e7b7adeb442c6
parent	96d2f314cd0520bf22eb8439bac158899965bd2d [diff]
parent	c0cfc1ed958fe27a801217707f0adca84ec4400e [diff]

tree: 3b50a063997200d13e6e0e6db82e7b7adeb442c6

README.md

Header only C++ tiny glTF library(loader/saver).

TinyGLTF is a header only C++11 glTF 2.0 https://github.com/KhronosGroup/glTF library.

Status

Work in process(devel branch). Very near to release, but need more tests and examples.

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.

Builds

Features

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 Update 3 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

Examples

glview : Simple glTF geometry viewer.
validator : Simple glTF validator with JSON schema.

Projects using TinyGLTF

px_render Single header C++ Libraries for Thread Scheduling, Rendering, and so on... https://github.com/pplux/px
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 plugin for Magnum, a lightweight and modular C++11/C++14 graphics middleware for games and data visualization.
Your projects here! (Please send PR)

TODOs

[ ] 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

Licenses

TinyGLTF is licensed under MIT license.

TinyGLTF uses the following third party libraries.

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
stb_image_write.h : v1.09 - public domain image writer - Github link

Build and example

Copy stb_image.h, stb_image_write.h, json.hpp and tiny_gltf.h to your project.

Loading glTF 2.0 model

// 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"

using namespace tinygltf;

Model model; 
TinyGLTF loader;
std::string err;
  
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());
}

if (!ret) {
  printf("Failed to parse glTF\n");
  return -1;
}

Compile options

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.

Saving gltTF 2.0 model

[ ] Buffers.
- [x] To file
- [x] Embedded
- [ ] Draco compressed?
[x] Images
- [x] To file
- [x] Embedded
[ ] Binary(.glb)

Running tests.

glTF parsing test

Setup

Python 2.6 or 2.7 required. Git clone https://github.com/KhronosGroup/glTF-Sample-Models to your local dir.

Run parsing test

After building loader_example, edit test_runner.py, then,

$ python test_runner.py

Unit tests

$ cd tests
$ make
$ ./tester
$ ./tester_noexcept

Third party licenses

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.