[Dev-C++] NOVICE NEEDS HELP!!!

[Brasier <br...@Pu...>]

Hi, 

 This is odviously a dumb question but....

 As far as i have been learning (not much but..) i have learnt ho to build a 3d world (kinda) but now i have read more and it says stuff about ive just created an engine -not in that form but along those lines- and i was just wondering if:

- A 3d engine is a 3d world already made and you just redisign it or what... i am very new and alough i have found tutorials i have yet found a site that tells me what everything is.

- I am now starting to programm in OPENGL and i was just wondering -how do you create corners in games like to walk around a corner and gradually see the bend and how to create doors that can be opened to then load the room behind it?

 I cant find many OpenGL tutorials that tell me anything like these questions and When i write it in Forums people think im asking them to do it for me but i just want to know how to do it...im trying my best to get my foot under the door of the Prograamming industry but i cant find tutorials for opengl and cant buy online books because of lack of credit card (im only 16)

i hope this makes sense....

Thanks in advance

Steve.B