some notes

README.md

@@ -7,4 +7,4 @@
 + [ ] Pong
 + [ ] Sudoku
 + [ ] Space Invaders
-
++ [ ] Rubik's Cube

notes.md

@@ -0,0 +1,20 @@
+# Makefile
+
+Will I finally learn how to make makefiles ? Probably not.
+https://makefiletutorial.com/
+
+# On software arch.
+
+## Polymorphism
+
+https://www.reddit.com/r/C_Programming/comments/18ljmo9/polymorphism_in_c/
+https://www.reddit.com/r/gamedev/comments/1cu5gzg/why_does_using_polymorphism_slow_down_my_game/
+
+## ECS
+
+https://gamedev.stackexchange.com/questions/172584/how-could-i-implement-an-ecs-in-c
+https://gamedev.stackexchange.com/questions/152080/how-do-components-access-one-another-in-a-component-based-entity-system/152093#152093
+https://github.com/SanderMertens/flecs
+
+https://prdeving.wordpress.com/2018/06/27/videogames-programming-ecs-system-in-plain-c/
+https://prdeving.wordpress.com/2023/12/14/deep-diving-into-entity-component-system-ecs-architecture-and-data-oriented-programming/