Pick back up and comment

Clean placeholder code to get it running.
Add comments to clarify working, add TODOs in main,
add some references for the maths.

main.cpp

@@ -3,6 +3,17 @@
 
 #include "World.h"
 
+// TODO: Handle inputs to move player
+// TODO: Raycast from player position
+// TODO: Fix raycasts and use it correctly
+// TODO: Render world in event loop
+// TODO: Understand what the code was doing (looks like scale from fill column is the output of the raycast)
+// Ref: https://lodev.org/cgtutor/raycasting.html
+// Ref: http://yunes.informatique.univ-paris-diderot.fr/wp-content/uploads/cours/INFOGRAPHIE/08-Raycasting.pdf
+// TODO: Update player for camera plane
+// TODO: Camera plane represents screen, rays go through it proportional to the screen
+// TODO: Find a way to go to edges instead of just equally split (?)
+
 int main()
 {
     std::cout << "Hello, World!" << std::endl;
@@ -27,4 +38,4 @@ int main()
     }
 
     return 0;
-}
+}