dbeef / blue

Small OpenGL rendering engine

Blue

Very basic rendering engine written in C++ over OpenGL.

Supports Android / Windows / Linux.

Tutorial code is provided under examples directory and will produce artifacts by default, unless -DBLUE_EXAMPLES=OFF is passed during CMake configuration.

Examples cover:

1. Create window
2. Render triangle
3. Load model (included) and render
4. Same as 3, but with FPS camera
5. Imgui integration (TODO)
6. Textured rectangle with volumetric texture atlas (TODO)

Dependency matrix

Dependency	Version	Purpose	License
SDL2	2.0.9	Abstraction for creating window and obtaining OpenGL context.	ZLIB
glm	0.9.9.5	Linear algebra.	The Happy Bunny License (Modified MIT License)
GTest	1.8.1	Running unit tests.	BSD 3-clause
Assimp	2.8	Loading 3D models.	BSD 3-clause
glad	2.0.0	Providing OpenGL headers, specific OpenGL version enforcement. Note: Bundled in sources.	MIT
imgui	1.70	Rendering GUI in current OpenGL context. Note: Bundled in sources.	MIT
stbimage	2.0	Decoding images to RGBA space. Note: Bundled in sources.	Public domain
spdlog	1.3.1	Logging	MIT

Additionally, Blue requires compiler supporting at least C++ 11 standard and a platform providing at least OpenGL 4.3 / OpenGL ES 3.0 context.

Building

BLUE_ROOT=`pwd`
rm -rf build
mkdir build
cd build
cmake .. -DCMAKE_INSTALL_PREFIX=$BLUE_ROOT/blue_install
cmake --build . --target install --config Release -- -j 2

Crosscompiling to Android

TODO

Testing

Tests are enabled by default, however, to disable tests, pass additional -DBLUE_ADD_TESTS=ON flag when configuring build with CMake.

Recognitions

https://github.com/suikki/simpleSDL/

For providing CMake file for SDL2 Android deployment.