Object not rendered properly on different angle

OpenGL OpenGL: Basic Coding
1

Hi all,

[ATTACH=CONFIG]956[/ATTACH]

Can i know what is the issue regarding the camera in this problem??
Which parameter can solve this camera problem??

Another question is, what is the problem with the circular ring that seems to be related with lighting??
[ATTACH=CONFIG]957[/ATTACH]

Thanks a lot.
:dejection::sorrow:

2

Probably you have not defined the vertex positions properly

3

http://i.imgur.com/gX8ryn9.gif?1

Hi, can you help me see what kind of problem is this coz i have no idea about this kind of problem…

Thanks a lot
:doh: