Added tinygltf as external dependency

CMakeLists.txt

@@ -11,6 +11,7 @@ include_directories(external/glm)
 include_directories(external/gli)
 include_directories(external/assimp)
 include_directories(external/imgui)
+include_directories(external/tinygltf)
 include_directories(base)
 
 OPTION(USE_D2D_WSI "Build the project using Direct to Display swapchain" OFF)

external/tinygltf/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Syoyo Fujita, Aurélien Chatelain and many contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

external/tinygltf/README.md

@@ -0,0 +1,157 @@
+# 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
+
+[![Build Status](https://travis-ci.org/syoyo/tinygltf.svg?branch=devel)](https://travis-ci.org/syoyo/tinygltf)
+
+[![Build status](https://ci.appveyor.com/api/projects/status/warngenu9wjjhlm8?svg=true)](https://ci.appveyor.com/project/syoyo/tinygltf)
+
+## 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](examples/glview) : Simple glTF geometry viewer.
+* [validator](examples/validator) : Simple glTF validator with JSON schema.
+
+## Projects using TinyGLTF
+
+* 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)
+
+## 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](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)
+
+
+## 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
+
+```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"
+
+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,
+
+```bash
+$ python test_runner.py
+```
+
+### Unit tests
+
+```bash
+$ 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.
+* catch : Copyright (c) 2012 Two Blue Cubes Ltd. All rights reserved. Distributed under the Boost Software License, Version 1.0.