Dead reckoning

Herr_O · 2002-02-28T05:14:27

HI! I've used dead reckoning for my online game and all works fine. Server used win98 and client used win98. But when I installed WinXP on the server the dead reckoning started to become more choppy/jerky than it was before. Then I checked the diffrent speeds on my players (I use netspeeds to calc the DR) and found out that the precision on the floating point values differs from winXP to win98 I tried again to go win98 on both client/server and the dead reckoning was better at once I'll try WinXP on both machines later tonight and hope that it will perform as well as win98-win98 did.. Has anyone else noticed this precision differing on XP-98, am I correct? (I'm talking about 0.000000XXXX changes). Edited by - Herr_O on February 21, 2002 10:00:18 AM Edited by - Herr_O on February 21, 2002 10:00:40 AM

Networking and Multiplayer Programming

Started by Herr_O February 21, 2002 08:59 AM

15 comments, last by Herr_O 22 years, 1 month ago

Anonymous

February 25, 2002 03:04 PM

Timmer functions have different resolutions on win9x and win2k/XP, specificly the timeGetTime() functions have 1 ms resolution on 98, and on win2k/XP can be 10 ms or more. You can set it explicitly on the later. Look on msdn on how too.

Hope this helps.

Good Luck!

-ddn

Ironside

122

February 26, 2002 02:07 PM

GetTickCount() has allways been one of my favorite ways to resolve timer issues.

Sphet

631

February 27, 2002 12:29 PM

If GetTickCount() has been your favorite timer, then you could have problems there. The high performance counters (QueryPerformanceCounter) are the only ways to establish cross-platform resolution. WinXP/2000/98/95/ME all have different resolutions to GetTickCount().

behemoth

122

February 27, 2002 02:54 PM

Sphet is right, QueryPerformanceCounter() is the only way to
have a decent timing function for Windoze. Working with
Linux you can use gettimeofday() which also has microsecond resolution but thats not the issue here.

ajoling

205

February 28, 2002 02:08 AM

QPC is also the slowest one to call...

www.persistentrealities.com for Inline ASM for VB, VB Fibre, and other nice code samples in C++, PHP, ASP, etc.<br/>Play Yet Another Laser Game!<br/>

Herr_O

184

Author

February 28, 2002 02:51 AM

Soo I should replace all of my GetTickCount with QPC?.. Im only using QPC now to determine frametime..

-----------------------------
Sometimes a Guru meditation must be followed by a Vulcan neck grip.

_____________________________
www.OddGames.com www.OddGames.com/daniel

ajoling

205

February 28, 2002 05:14 AM

Make up for yourself what the best one is, for you.

Check: http://www.mvps.org/directx/indexes/game_timing.htm

www.persistentrealities.com for Inline ASM for VB, VB Fibre, and other nice code samples in C++, PHP, ASP, etc.<br/>Play Yet Another Laser Game!<br/>

Dead reckoning

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