Java-Gaming.org Hi !
Featured games (83)
games approved by the League of Dukes
Games in Showcase (522)
Games in Android Showcase (127)
games submitted by our members
Games in WIP (590)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: 1 [2]
  ignore  |  Print  
  how to make a camera  (Read 5972 times)
0 Members and 1 Guest are viewing this topic.
Offline deepthought
« Reply #30 - Posted 2010-09-20 00:41:40 »

why should i use glrotate with the yaw? glulookat does that for me

jocks rule the highschools. GEEKS RULE THE WORLD MWAHAHAHA!!
captain failure test game
Offline gouessej
« Reply #31 - Posted 2010-09-20 07:20:01 »

why should i use glrotate with the yaw? glulookat does that for me
No, gluLookAt keeps your up vector as is:
http://www.manpagez.com/man/3/gluLookAt/

It is up to you to provide a correct up vector directly or to use several calls to glRotate in order to obtain the same result.

Offline tom
« Reply #32 - Posted 2010-09-20 08:59:42 »

No, gluLookAt keeps your up vector as is:
http://www.manpagez.com/man/3/gluLookAt/

It is up to you to provide a correct up vector directly or to use several calls to glRotate in order to obtain the same result.

His code is fine. There is only a problem if he looks in the exact UP or down direction. If that is likely to happen you should add a special case for that, otherwise pat yourself on the back and move on.

Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline gouessej
« Reply #33 - Posted 2010-09-20 09:48:46 »

His code is fine.
According to you, the up vector is correct, isn't it? But he always provides (0,1,0). I don't understand why you think it is fine.

There is only a problem if he looks in the exact UP or down direction. If that is likely to happen you should add a special case for that, otherwise pat yourself on the back and move on.
Ok you're speaking about the both singularities at the south and the north poles (gimbal lock). I agree with you.

Offline tom
« Reply #34 - Posted 2010-09-20 10:35:03 »

Your right, I didn't read the whole tread and I thought he actually wanted an always up camera.

But if I understand the problem correctly now (probably not) then the easiest solution would be to use the matrices that are built into OpenGL. No need to mess around with Quaternions.

1  
2  
3  
4  
5  
gl.glLoadIdentity();
gl.glTranslate(atx, aty, atz);
gl.glRotate(yaw, 1, 0, 0);
gl.glRotate(pitch, 0, 1, 0);
gl.glRotate(roll, 0, 0, 1);



Offline gouessej
« Reply #35 - Posted 2010-09-24 23:07:08 »

Your right, I didn't read the whole tread and I thought he actually wanted an always up camera.

But if I understand the problem correctly now (probably not) then the easiest solution would be to use the matrices that are built into OpenGL. No need to mess around with Quaternions.

1  
2  
3  
4  
5  
gl.glLoadIdentity();
gl.glTranslate(atx, aty, atz);
gl.glRotate(yaw, 1, 0, 0);
gl.glRotate(pitch, 0, 1, 0);
gl.glRotate(roll, 0, 0, 1);



The code above uses Euler transforms to combine 3 rotations so there is a risk of gimbal lock as I explained earlier Sad

Pages: 1 [2]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

trollwarrior1 (29 views)
2014-11-22 12:13:56

xFryIx (71 views)
2014-11-13 12:34:49

digdugdiggy (50 views)
2014-11-12 21:11:50

digdugdiggy (44 views)
2014-11-12 21:10:15

digdugdiggy (38 views)
2014-11-12 21:09:33

kovacsa (62 views)
2014-11-07 19:57:14

TehJavaDev (67 views)
2014-11-03 22:04:50

BurntPizza (64 views)
2014-11-03 18:54:52

moogie (80 views)
2014-11-03 06:22:04

CopyableCougar4 (80 views)
2014-11-01 23:36:41
Understanding relations between setOrigin, setScale and setPosition in libGdx
by mbabuskov
2014-10-09 22:35:00

Definite guide to supporting multiple device resolutions on Android (2014)
by mbabuskov
2014-10-02 22:36:02

List of Learning Resources
by Longor1996
2014-08-16 10:40:00

List of Learning Resources
by SilverTiger
2014-08-05 19:33:27

Resources for WIP games
by CogWheelz
2014-08-01 16:20:17

Resources for WIP games
by CogWheelz
2014-08-01 16:19:50

List of Learning Resources
by SilverTiger
2014-07-31 16:29:50

List of Learning Resources
by SilverTiger
2014-07-31 16:26:06
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!