FreeGameDev

I was reading game engine architecture and introduction to game development for my thesis.

i came a cross a part which says that developers dont have access to some layers of game engine and the use sdk to gain the access to these layer.

the problem is i cant find this part now if anyone can tell me the chapter of this part it would be great.
i kno it sound stupid

You really don't make sense :P

I guess what the book is referring to is that most game engines are closed-source and you have to use the functions offered via the SDK. However this forum is only about open-source games where this isn't the case.

i remember it said something like "a developer does not have a direct interaction with the HAL Any interaction with the Hal occurs through a third party platform software development kits"

Excepted if, as Julius said, the HAL is open source and/or made by the dev him/herself