7 replies to this topic

[TheLionKing]

Hi,

For moving cameras in the screen, we can either use

• gluLookat() or
  
• glRotatef(), glTranslatef()

glRotatef() and glTransoatef() are used to move the pointer on the screen. (I think)

gluLookat() takes in 9 parameters however, and it is also said that it can be use beside the above two.

• What is the real difference between them?
  
• Which gives the best result what we want?
  
• What do the professionals use for moving the camera in their games :blush: ?

[davepermen]

i use LookAt for the camera placement, and Rotate/Translate(/Scale,MultMatrix) for positioning the objects..

on how to use them, use google, and you get the helpfiles.. or even in your favourite MSDN library, eighter in visual studio integrated, or online..

[TheLionKing]

So you mean that we can use both or any one of them to accomplish the same task.

Both perform the same work ... right :wtf: ?

[Dia]

Well, both could give the same visual effect, but mathematically, they are completly different. I'd recommend using gluLookAt for camera, and glTranslatef/glRotatef for objects. i.e. don't mix them up. It's just more logical. I mean, don't use glTranslatef when, in actual fact, you mean moving the camera for example.

[TheLionKing]

So (if I am not wrong :blush: ) you mean :

• gluLookAt() is used to move the camera around the objects
  
• While glTranslatef() & glRotatef() are used to move the objects around the camera

I think I am right ... :blush:

[donBerto]

yes that's right. but it's more like this: gluLookAt opens a window at the position you have specified [to look into]. but there is no actual camera object.

as far as gluLookAt being enough for your project, it is. but if you wanna have some fun, try making a camera class.

:yes:

[rogerdv]

After reading this topic I modified my code to use gluLookAt. I discovered huge mistakes and some things i havent managed to achieve now looks easier.
So I have to say that not using gluLookat is the most stupid mistake you can make.

[TheLionKing]

:yes: Thanks guys ... I have got the picture clearly moving aroung my eyes.

Thanks ... :D !