GL GFX is a C++-(mostly)header-only library for developing games. It relies on OpenGL as a backend.
It is an evolution of the NCurses Game Engine and inspired by the One Lone Coder's olcPixelGameEngine. A number of projects are based off YouTube videos of his.
The library has MacOS in mind, as for Audio it relies on CoreAudio and it expects a GLUT that supports Retina.
The library consists of six header files, which are listed in the table below together with their usage.
| header | usage |
|---|---|
Audio.h |
main SFX library |
GFX3D.h |
2D and 3D vector/matrix math |
GLGFX.h |
main GFX library |
SampledAudio.h |
play sampled audio |
Sprite.h |
draw/manipulate sprites |
Widgets.h |
widget library |
Note that the library is set in thenamespace cb::.
nesfonts8x8.c holds the font used to draw text.
A number of projects are available in subdirectories. See each of them for examples and details on how to use GL GFX.
A tool called Create Asset is included that can convert a binary asset into a format that can be directly included in C/C++-code, e.g., graphics and sound. It attempts to optimize space by compressing the data using zlib. This can increase binary portability.
The tool is compiled with:
makeThis results in a binary executable called CreateAsset, which is invoked as:
./CreateAsset nesfont8x8.binThe above will result in a file called nesfont8x8.c. The data can be included in a C/C++ project by using the variables listed in the table below and prepending the extern-keyword. The table also gives the usage of each variable.
| type | name | usage |
|---|---|---|
| size_t | nesfont8x8_s | number of uncompressed bytes |
| size_t | nesfont8x8_sz | number of compressed bytes |
| const char[] | nesfont8x8_z | byte data |
GL GFXis an evolution of theNCurses Game Engine.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
-
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
-
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
-
Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.