Tiny glTF loader, header only C++ glTF parsing library.

TinyGLTFLoader is a header only C++ glTF https://github.com/KhronosGroup/glTF parsing library

Features

• Portable C++. C++-03 with STL dependency only.
• Moderate parsing time and memory consumption.
• glTF specification v1.0.0
  • ASCII glTF
  • Binary glTF(https://github.com/KhronosGroup/glTF/tree/master/extensions/Khronos/KHR_binary_glTF)
• Buffers
  • Parse BASE64 encoded embedded buffer fata(DataURI).
  • Load .bin file.
• Image(Using stb_image)
  • Parse BASE64 encoded embedded image fata(DataURI).
  • Load external image file.
  • PNG(8bit only)
  • JPEG(8bit only)
  • BMP
  • GIF

Examples

• glview : Simple glTF geometry viewer.
• writer : Simple glTF writer(serialize tinygltf::Scene class)
• alembic_to_gltf : Simple Alembic to glTF converter.
• cyhair_to_gltf : Simple CyHair(hair curves) to glTF converter.

TODOs

• Write C++ code generator from json schema for robust parsing.
• Support multiple scenes in .gltf
• Parse skin
• Compression/decompression(Open3DGC, etc)
• Support extensions and extras property
• HDR image?

License

TinyGLTFLoader is licensed under MIT license.

TinyGLTFLoader uses the following third party libraries.

• picojson.h : Copyright 2009-2010 Cybozu Labs, Inc. Copyright 2011-2014 Kazuho Oku
• base64 : Copyright (C) 2004-2008 René Nyffenegger
• stb_image.h : v2.08 - public domain image loader - http://nothings.org/stb_image.h

Build and example

Copy stb_image.h, picojson.h and tiny_gltf_loader.h to your project.

// Define these only in *one* .cc file.
#define TINYGLTF_LOADER_IMPLEMENTATION
#define STB_IMAGE_IMPLEMENTATION
#include "tiny_gltf_loader.h"

using namespace tinygltf;

Scene scene; 
TinyGLTFLoader loader;
std::string err;
  
bool ret = loader.LoadASCIIFromFile(scene, err, argv[1]);
//bool ret = loader.LoadBinaryFromFile(scene, 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;
}

Running tests.

Setup

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

Run test

After building loader_example, edit test_runner.py, then,

$ python test_runner.py