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 \tableofcontents
 
-\chapter{\{Kolejny Rodzial Pracy \} }
+\chapter{ Introduction }
+\section{ Choice of graphic renderning API }
+There are 3 main APIs for graphical rendering
+\begin{itemize}
+    \item DirectX
+    \item OpenGL 
+    \item Vulkan
+\end{itemize}
+DirectX developed by Microsoft focues on Windows operating systems and 
+Microsoft line of consoles Xbox, it is deemed as being harder with more 
+low level programming and requiring better understanding of how underlying
+mechanisms work but in turn offers functionalities and better performance. 
+It does not have free license. \\
+OpenGL is developed by Khronos Group and offers good compatibility, 
+especially if using OpenGL ES subset which works on Windows, Linux, 
+Mac OS, Android, iOS and all major consoles. 
+It is widely recognized as easiest of APIs and most popular choice 
+for writing first game engine. On the other hand it lacks some of 
+more advanced features which have to be written manually. 
+It uses open source license similar to BSD
+\\
+Vulkan is also developed by Khronos Group and as such is deemed as a 
+spiritual successor of OpenGL with focus on using modern C++ features and 
+fixing issues created by OpenGL 30 years old development time. 
+Out of these three it is recognized as the hardest one as 
+it is both complicated and newest. Similarly as OpenGL 
+it uses open source license, namely Apache License 2.0. 
+\\
+Considering all of those characteristics I decided to go with OpenGL API, 
+specifically OpenGL ES subset with its focus on compatibility as 
+making a multiplatform application is one of the focues of this thesis.
+I decided that since this will be my first attempt at game engine development 
+I need something that is relatively easy and has a lot of resources online.
+I would most likely not use advanced features of Vulkan and DirectX and 
+therefore finish my thesis before approaching problems where OpenGL 
+does not deliver more complicated architecture. 
+From my own private preferences I also prefer software with 
+open source license.
 
 
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 \end{document}
+