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 # SFW - Simple Framework
 
-Simple experimental c++ app framework to help with teaching programming and OOP.
+Simple experimental c++ app / game framework inspired by the single file c game engines 
+and libraries, especially [FWK](https://github.com/r-lyeh/FWK).
 
-Inspired by the single file game engines like FWK.
+It was designed to help with teaching programming, but it turns out it's pretty useful for other projects aswell.
 
-## TODO
+This library / framework is:
+- Simple to compile.
+- Simple to initialize.
+- Simple to use.
+- Supports windowing and opengl (ES2).
+- Modular (within reason).
+- It is desktop only (Windows, Linux, OSX) for now (most code is multiplatform though).
 
-Nice readme\
-Some improvements on docs\
-Usage imformation to the top of the merged headers\
-Update example codes\
-Update classes in SFWL\
-Release
+Also:
+- The codebase is simple and easy to read.
+- Comes with it's own container classes and memory management.
+- Comes as 2 (or 3) merged files. (This way it's actually simpler to use and setup compared to if it was single header!)
+- It does not use exceptions.
 
+A lite version is also available (sfwl).
+
+## Modules
+
+Currently the framework contains 5 modules, they are additive:
+
+### Core
+
+Has:
+- Typedefs
+- Math defines, and a class
+- Logging, and error macros
+- Math helper classes (like Vector2, Vector3, Projection, Transform etc.)
+- Containers
+- Memory management
+- Threading
+- Subprocess handling
+- Sockets
+- Strings
+- File and Directory handling
+
+Does not depend on anything.
+
+### Object
+
+Has:
+- Object, Reference, Resource classes
+- Variant class that can store anything
+- Signal class
+
+Depends on Core.
+
+### Render Core
+
+A c++ abstraction over the opengl api.
+
+Has:
+- Shaders
+- Materials
+- Meshes
+- Windowing
+- Fonts
+- Images
+- Textures
+- FrameBuffers
+- Input handling
+- An Application and a Scene class for easier development
+
+Depends on Core and Object.
+
+### Render Immediate
+
+Contains a simple immediate renderer class. (called Renderer.)
+
+Depends on Core, Object and Render Core.
+
+### Render Object
+
+Contains a class based renerer api.
+
+Has classes like:
+- Camera2D
+- Camera3D
+- MeshInstance 2D/3D
+- Text2D
+- TileMap
+- Etc.
+
+Depends on Core, Object and Render Core.
+
+## SFWL
+
+The library's lite version.
+
+Same as the normal library except the math helper classes were removed (except for Vector2i, and Rect2i).
+
+It only has 2 modules, Core, and Objects.
+
+## Compilation without the renderer
+
+If you don't need the renderer then everything is extremely simple.
+
+First grab a version that does not have the renderer.
+
+Now you have 2 files: `sfw.h` and `sfw.cpp` or `sfwl.h` and `sfwl.cpp` depending on your choice.
+
+If you use an ide, just add these files to your project (so the .cpp file gtes compiled), and you are done.
+
+If you are using a compiler directly, then just add `sfw.cpp` or `sfwl.cpp` to the list of files that you are compiling:
+
+g++ / mingw:
+
+```
+g++ -g sfwl.cpp main.cpp -o prog 
+```
+
+Note: -g means add debug information to the executable.
+
+MSVC:
+
+```
+cl /Zi /EHsc /Feprog-vc.exe sfw.cpp main.cpp
+```
+
+Note: /Zi means add debug information to the executable.
+
+If you are creating object files:
+
+g++ / mingw:
+
+```
+g++ -g -c sfwl.cpp -o sfwl.o
+g++ -g -c main.cpp -o main.o
+
+g++ -g sfwl.o main.o -o prog
+```
+
+MSVC:
+
+```
+cl /EHsc /Zi /c sfw.cpp /Fo:sfw.obj
+cl /EHsc /Zi /c main.cpp /Fo:main.obj
+
+cl /Zi /EHsc /Feprog-vc.exe sfw.obj main.obj
+```
+
+Note: You might need to set c++14 level compatibility depending on your compiler. While the codebase is somwhere between 
+c++89 and c++11, threads use classes from the std namespace that were added in c++14. Nowadays these are usually available 
+without any special setting, but if your compiler is older (or set differently) you might need to add something like: 
+`-std=c++14` to your compile commands.
+
+## Compilation with the renderer
+
+If you also want the renderer, first set everything up exactly as in the "Compilation without the renderer" section, 
+except you will have 3 files: `sfw.h` and `sfw.cpp`, and `sfw_3rd.m` (this is actually a c file, it has 
+the extencion `.m` to make OSX builds easier).
+
+As a second step we need to tell the linker to link to some of the libraries in the system dynamically in order to
+open windows and use opengl.
+
+### MSVC (Windows)
+
+If you are using MSVC you are actually done, no need to do anything else as MSVC has a nice feature where 
+this can be done automatically. Search the codebase for `#pragma comment` to see the libraries that get linked.
+
+### MingW
+
+If you are using mingw (If you use the g++ command on windows, that is MingW!), this is how your last (linking) command changes:
+
+```
+g++ -g sfwl.cpp main.cpp -lgdi32 -lShlwapi -lws2_32 -o prog 
+```
+
+Or
+
+```
+g++ -g sfwl.o main.o -lgdi32 -lShlwapi -lws2_32 -o prog
+```
+
+Note the position of the `-l` commands, add those after your object (or .cpp) files.
+
+Also, you don't need to add these to the other steps that does not create the final executable.
+
+Note if you use clang, just replacing `g++` to `clang++` or `clang` should work.
+
+### Linux (G++ / clang)
+
+On debian based distributions run the following command to make sure that dependencies are installed:
+
+```
+sudo apt-get install libx11-dev libxcursor-dev libxrandr-dev libxinerama-dev libxi-dev
+```
+
+Arch based systems should have these by default. For other distros consult the manual and / or the internet
+to see which packages are the equivalent of the ones listed above.
+
+
+If you are using g++, this is how your last (linking) command changes:
+
+```
+g++ -g sfwl.cpp main.cpp -lX11 -o prog 
+```
+
+Or
+
+```
+g++ -g sfwl.o main.o -lX11 -o prog
+```
+
+Note the position of the `-l` command, add those after your object (or .cpp) files.
+
+Some g++ versions seem a lot more leanient, for example on Manjaro as of this writing 
+`g++ -g -lX11 sfwl.o main.o -o prog` works, but on the Raspberry pi (Raspian) it doesn't.
+
+Also, you don't need to add these to the other steps that does not create the final executable.
+
+Note if you use clang, just replacing `g++` to `clang++` or `clang` should work.
+
+### OSX (clang)
+
+If you need the renderer you will need to use clang on OSX.
+
+First we need to setup SDK paths:
+
+```
+export SDKROOT=$(xcrun --show-sdk-path)
+```
+
+Set up some helper variables: 
+
+```
+export cpp_args="-std=c++14 -w -framework cocoa -framework iokit -framework CoreFoundation -framework CoreAudio -framework AudioToolbox "
+export m_args="-w -framework cocoa -framework iokit -framework CoreFoundation -framework CoreAudio -framework AudioToolbox "
+```
+
+On OSX sfw_3rd.m need to be compiled manually, separately:
+
+(This is a workaround, because Objective-C and C++ code doesn't mix in a single file, but Objective-C and C does.)
+
+```
+clang++ -w $m_args -g -c sfw_3rd.m -o sfw_3rd.o
+```
+
+Now just compile everything else to objects:
+
+```
+clang++ $cpp_args -g -c sfw.cpp -o sfw.o
+clang++ $cpp_args -g -c game_scene.cpp -o game_scene.o
+clang++ $cpp_args -g -c main.cpp -o main.o
+```
+
+Then just link them together:
+
+```
+clang++ $cpp_args -g sfw.o sfw_3rd.o game_scene.o main.o -o game 
+```
 
 ## CompileDB
 
-python -m venv venv\
-. ./venv/bin/activate\
-pip install compiledb\
-compiledb make
+If you want to edit the split version of the framework in the `sfw` or `sfwl` folder and you
+want to generate a compiledb, currently the simples solution that I know of is to install 
+the `compiledb` python module and just use it with the makefile in the root of the project.
+
+Create virtual env:
+
+``` python -m venv venv ```
+
+Activate it (This is for bash on linux).
+
+Commands for other shells: https://docs.python.org/3/library/venv.html#how-venvs-work
+
+``` . ./venv/bin/activate ```
+
+Install:
+
+``` pip install compiledb ```
+
+Run compiledb with make to generate compile_commands.json
+
+``` compiledb make ```