Java-Gaming.org Hi !
Featured games (90)
games approved by the League of Dukes
Games in Showcase (739)
Games in Android Showcase (224)
games submitted by our members
Games in WIP (820)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  floats vs. doubles  (Read 1141 times)
0 Members and 1 Guest are viewing this topic.
Offline skytomorrownow

Junior Devvie





« Posted 2009-04-01 18:02:53 »

Up until now, I have just been using doubles everywhere. Mostly, I have done this because I'm far too lazy to type a lot of "f"s after numbers. Now that I am beginning to deal with larger volumes of data going from the client to the GPU, I've noticed that glDrawElements() is the biggest pig at the CPU trough. So, I've set everything up to leverage glInterleavedArrays(); but I noticed that it only supports floats ( from what I can tell ). I can see that if throughput becomes an issue, I would want to send floats across to the GPU to reduce the amount of data. So, how do JOGLrs out there deal with this?

Work in double format on client side, then convert when you send to GPU?
Work only in float format?
Work only in double format -- just use multiDrawElements(), make your data as sparse as possible, and just deal with that?

cheers
Offline Riven
Administrator

« JGO Overlord »


Medals: 1313
Projects: 4
Exp: 16 years


Hand over your head.


« Reply #1 - Posted 2009-04-01 20:30:55 »

The GPU is not even able to do math in 64 bits.

So it makes no sense to send it double values.

Hi, appreciate more people! Σ ♥ = ¾
Learn how to award medals... and work your way up the social rankings!
Offline skytomorrownow

Junior Devvie





« Reply #2 - Posted 2009-04-02 00:21:25 »

ah. Thank you Riven. OK, so sounds like either work in floats, or convert to floats then use glInterleavedArrays(). I know this stuff is sort of obvious to an experienced person, so thanks for the response.

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

 
Ecumene (61 views)
2017-09-30 02:57:34

theagentd (82 views)
2017-09-26 18:23:31

cybrmynd (189 views)
2017-08-02 12:28:51

cybrmynd (189 views)
2017-08-02 12:19:43

cybrmynd (194 views)
2017-08-02 12:18:09

Sralse (206 views)
2017-07-25 17:13:48

Archive (770 views)
2017-04-27 17:45:51

buddyBro (904 views)
2017-04-05 03:38:00

CopyableCougar4 (1454 views)
2017-03-24 15:39:42

theagentd (1331 views)
2017-03-24 15:32:08
List of Learning Resources
by elect
2017-03-13 14:05:44

List of Learning Resources
by elect
2017-03-13 14:04:45

SF/X Libraries
by philfrei
2017-03-02 08:45:19

SF/X Libraries
by philfrei
2017-03-02 08:44:05

SF/X Libraries
by SkyAphid
2017-03-02 06:38:56

SF/X Libraries
by SkyAphid
2017-03-02 06:38:32

SF/X Libraries
by SkyAphid
2017-03-02 06:38:05

SF/X Libraries
by SkyAphid
2017-03-02 06:37:51
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!