How to build Otto Matic

TL;DR: Automated build script

Clone the repo recursively, then run python3 build.py to execute the build steps described in this document and package up the game.

build.py is the script that is used by the CI setup to produce builds. If you want to build the game manually instead, read on.

Clone the repo recursively:

git clone --recurse-submodules https://github.com/jorio/OttoMatic

Download SDL2-2.0.16.dmg, open it, and copy SDL2.framework to the extern folder
Prep the Xcode project:
```
cmake -G Xcode -S . -B build
```
Now you can open build/OttoMatic.xcodeproj in Xcode, or you can just go ahead and build the game:
```
cmake --build build --config Release
```
The game gets built in build/Release/OttoMatic.app. Enjoy!

Install the prerequisites:
- Visual Studio 2019 with the C++ toolchain
- CMake 3.20+

Clone the repo recursively:

git clone --recurse-submodules https://github.com/jorio/OttoMatic

Download SDL2-devel-2.0.16-VC.zip and extract the contents into the extern folder

Prep the Visual Studio solution:

cmake -G "Visual Studio 16 2019" -A x64 -S . -B build

Now you can open build/OttoMatic.sln in Visual Studio, or you can just go ahead and build the game:
```
cmake --build build --config Release
```
The game gets built in build/Release/OttoMatic.exe. Enjoy!

Install the prerequisites from your package manager:
- Any C++20 compiler
- CMake 3.13+
- SDL2 development library (e.g. "libsdl2-dev" on Ubuntu, "sdl2" on Arch, "SDL-devel" on Fedora)
- OpenGL development libraries (e.g. "libgl1-mesa-dev" on Ubuntu)

Clone the repo recursively:

git clone --recurse-submodules https://github.com/jorio/OttoMatic

Build the game:

cmake -S . -B build -DCMAKE_BUILD_TYPE=Release
cmake --build build