hikarihe

or you can do it yourself if you want

find how the vertices and normals and texture coordinates are stored in the file produced when you export the model and use that data to maybe store it in a class or array or any data structure in your code and then use this structure to draw your model when you call glVertex / glNormal / glTexCoord

if you decide to do it I'll do what I can to help you through it

have fun

can you explain more clearly? I could help you but I don't really understand what you need to do

what does your code look like now?

in most cases you can use glRotatef( [your rotation value], [x coordinate], [y coordinate], [z coordinate] ) before you draw 

> where xyz are the coordinates of the point to rotate around & rotation value is in degrees

if something ( A ) is in the big Oh of something else ( B ), ignoring everything but the n's in each sides

B will eventually be larger than A ( from any n towards infinity ).

The main purpose of this is to check the efficiency of a piece of code

https://en.wikipedia.org/wiki/Time_complexity#Table_of_common_time_complexities

^ this is probably all you need to know

also Big Oh is for the worst case

basic example:

if you loop through all n elements in an array to find a specific element, worst case scenario you will go through all n elements, so we say the code will run in the big oh of n.

I'm willing to code for this in C if you are interested!

try this:

http://www.opengl-tutorial.org/

I suggest avoiding tutorials that use GLUT or too many external libraries. Also tutorials generally either teach you the basics, or something specific.

So for a 3D car game you will have to do a lot of work by yourself. have fun (^。^)ｂ