Sorry your browser is not supported!

You are using an outdated browser that does not support modern web technologies, in order to use this site please update to a new browser.

Browsers supported include Chrome, FireFox, Safari, Opera, Internet Explorer 10+ or Microsoft Edge.

DarkBASIC Discussion / how is a camera created

Author
Message
pictionaryjr
15
Years of Service
User Offline
Joined: 12th Mar 2009
Location:
Posted: 31st Jul 2009 23:08
Link
I was thinking about it the other day and was confused on how a camera is created. It isn't an object and is able to move around in 3d space so my question is how is a camera created.
Back to top
Profile PM Email
NeX the Fairly Fast Ferret
19
Years of Service
User Offline
Joined: 10th Apr 2005
Location: The Fifth Plane of Oblivion
Posted: 31st Jul 2009 23:15 Edited at: 31st Jul 2009 23:18
Link
The "camera" is just a way of changing the values entered into the calculations needed to work out where the 3D vertices end up on the 2D screen. It's not an object at all; it just uses similar commands to objects to make it a bit more intuitive.

If you want the more technical details on how this process works, it is based around a 4x4 perspective matrix transform.

Back to top
Profile PM Website
Dark Dragon
16
Years of Service
User Offline
Joined: 22nd Jun 2007
Location: In the ring, Kickin\' *donkeybutt*.
Posted: 31st Jul 2009 23:43
Link
interesting.......go on, Nex....

Your signature has been erased by a mod because it was too big.CHANGE IT OR DIE!!!!!
Back to top
Profile PM
NeX the Fairly Fast Ferret
19
Years of Service
User Offline
Joined: 10th Apr 2005
Location: The Fifth Plane of Oblivion
Posted: 1st Aug 2009 00:00
Link
If you want me to be honest, I don't know how 4x4 matrix transforms work, I just know how to use them...

This is more about 2D transformations but the principles are very similar.

http://en.wikipedia.org/wiki/Transformation_matrix

Back to top
Profile PM Website
pictionaryjr
15
Years of Service
User Offline
Joined: 12th Mar 2009
Location:
Posted: 1st Aug 2009 01:21
Link
That has to be the most complex thing I ever "attempted" to read.lol.
Back to top
Profile PM Email
Dark Dragon
16
Years of Service
User Offline
Joined: 22nd Jun 2007
Location: In the ring, Kickin\' *donkeybutt*.
Posted: 2nd Aug 2009 04:00
Link
Quote: "That has to be the most complex thing I ever "attempted" to read.lol. "


Agreed. But it is fairly interesting, lol.

(\__/) HHAHAHAHAHAH!
(O.o ) / WORLD DOMINATION!!!!!!!!!!
(> < )
Back to top
Profile PM
TDK
Retired Moderator
21
Years of Service
User Offline
Joined: 19th Nov 2002
Location: UK
Posted: 2nd Aug 2009 23:19
Link
The 'camera' is only a 'human' term which is easier for us to get our heads around, rather than talking about a 'viewport' - or port (window) from which to view a scene.

As the monitor screen we look at is 2D and our world is 3D, the transformations simply turn the 3D points in space into 2D dots (pixels).

TDK_Man

* TDK's Web Site *

Back to top
Profile PM Email Website
pictionaryjr
15
Years of Service
User Offline
Joined: 12th Mar 2009
Location:
Posted: 3rd Aug 2009 06:03
Link
This is just a guess but does it create a 3d world offscreen. Then calculate where the "camera" would be and positions the points that we would see onto the 2d screen
Back to top
Profile PM Email
Libervurto
17
Years of Service
User Offline
Joined: 30th Jun 2006
Location: On Toast
Posted: 3rd Aug 2009 06:13
Link
yep, every vertex is a point in virtual 3D space and that is put through a mangel to make it 2D like TDK said.
by mangel I mean complex formula.

TGC Forum - converting error messages into sarcasm since 2002.
Back to top
Profile PM Email
Back to top

Login to post a reply

Server time is: 2024-05-20 05:34:11
Your offset time is: 2024-05-20 05:34:11