Update Dependency Instructions

Author: rodneyp290

README.md

@@ -7,9 +7,13 @@ Initially generated with [xmlpg](https://github.com/open-dis/xmlpg).
 
 ## Building Open DIS
 
-* [premake5](http://premake.github.io/) is required to build the platform specific projects. Download it and make sure it's available on your path, or specify the path to it. 
+* [CMake](http://cmake.org/) is required to build the platform specific projects.
+  It can be downloaded and installed from http://cmake.org/
 
-* SDL2 and SDL2_net are required libraries to compile the examples. See the [.travis.yml](.travis.yml) for more details on setting up a build environment.
+* SDL2 and SDL2_net are required libraries to compile the examples.
+  These can usually be install via linux package managers.
+  More details, and instructions for Windows are included [below](#SDL2-and-SDL2_net-Install-Instructions).
+**NOTE:** Windows users will need to either add the DLL folders to their path, or copy the DLLs to the output directory (`Debug`).
 
 ### Linux / GNU Makefiles
 
@@ -28,6 +32,9 @@ Initially generated with [xmlpg](https://github.com/open-dis/xmlpg).
 
 
 ### Old Pre-make build instructions
+
+* [premake5](http://premake.github.io/) is required to build the platform specific projects. Download it and make sure it's available on your path, or specify the path to it.
+
 #### Linux / GNU Makefiles
 1. Run `premake5 gmake`
 1. Run `make config=release`
@@ -40,3 +47,61 @@ Initially generated with [xmlpg](https://github.com/open-dis/xmlpg).
 ## Developer Docs
 
 The latest doxygen docs for the Open DIS master branch can be found [here](https://codedocs.xyz/open-dis/open-dis-cpp/).
+
+## SDL2 and SDL2_net Install Instructions
+
+### Linux Package Managers
+
+Arch: ```sudo pacman -S sdl2 sdl2_net```
+
+Fedora: ```sudo dnf install SDL2-devel SDL2_net-devel```
+
+Ubuntu: ```sudo apt-get install libsdl2-dev libsdl2-net-dev```
+
+If you're unable to install the correct packages, try [installing from source](#POSIX-Source-Installation)
+
+### Windows Instructions
+
+These are the installation steps that have been tested with open-dis-cpp, however there are other methods for installation.
+Experienced users should feel free to customise their install.
+
+#### (Core) SDL2 Instructions
+
+1. Navigate to the SDL2 [Download](https://www.libsdl.org/download-2.0.php) page, and download the latest Development Libraries.
+
+   Alternatively, the version tested with open-dis-cpp, 2.0.12-VC, can be downloaded from this [direct link](https://www.libsdl.org/release/SDL2-devel-2.0.12-VC.zip).
+
+2. Extract the SDL2-devel-2.0.12-VC.zip file directly to your `C:\`.
+3. Rename the resulting `SDL2-2.0.12` folder to `SDL2`.
+4. Add `C:\SDL2\lib\x64` to your System Path for 64-bit systems,
+   or add `C:\SDL2\lib\x86` for 32-bit systems.
+
+#### SDL2_net Instructions
+
+1. Navigate to the SDL2_net [project](https://www.libsdl.org/projects/SDL_net/) page, and download the latest Development Libraries.
+
+   Alternatively, the version tested with open-dis-cpp, 2.0.1-VC, can be downloaded from this [direct link](https://www.libsdl.org/projects/SDL_net/release/SDL2_net-devel-2.0.1-VC.zip).
+
+2. Extract the SDL2-devel-2.0.12-VC.zip
+3. Copy the `include` and `lib` directories from the resulting folder into you `C:\SDL2\` folder
+
+### POSIX Source Installation
+
+#### (Core) SDL2
+Run the following commands:
+1. `wget http://libsdl.org/release/SDL2-2.0.12.tar.gz`
+   Or, Download via your favourite web browser.
+   **NOTE:** check the [download](https://www.libsdl.org/download-2.0.php) page for new releases
+2. `tar -xvf SDL2-2.0.9.tar.gz`
+3. `pushd SDL2-2.0.9/`
+4. `./configure --prefix=/usr && make && sudo make install`
+5. `popd`
+
+#### SDL2_net
+1. `wget https://www.libsdl.org/projects/SDL_net/release/SDL2_net-2.0.1.tar.gz`
+   Or, Download via your favourite web browser.
+   **NOTE:** check [https://www.libsdl.org/projects/SDL_net](project) page for new releases
+2. `tar -xvf SDL2_net-2.0.1.tar.gz`
+3. `pushd SDL2_net-2.0.1/`
+4. `./configure --prefix=/usr && make && sudo make install`
+5. `popd`