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Re: New Feature: Tracking[message #337686] Tue, 11 November 2014 02:42 Go to previous messageGo to previous message
Ocular

 
Messages:24
Registered:September 2014
Hiya Flugente, great feature!

I have a bug report:

The tracking patch introduces very large periodic CPU spikes due to a large number of sudden successive cover display calculations when in COVER_DRAW_MERC_VIEW, or in another expensive cover view.

AFAICT, this is because SOLDIERTYPE::SoldierPropertyUpkeep() is triggered a large number of times in a row about every ~3 seconds, forcing a cover recalculation each time due to the call to DisplayCover( TRUE ).

While I think that the periodic runs of SoldierPropertyUpkeep() is probably a bug worth investigating, calling DisplayCover() with the forceUpdate parameter to TRUE causes the expensive cover calculation to be recalculated before an interval of COVER_SYSTEM_UPDATE_DELAY has passed.

Calling DisplayCover( FALSE ) fixes this issue, and relieves the problem somewhat. There are still CPU spikes during cover display, but this fix at least addresses this performance regression.

Trivial patch follows. Thanks!

Index: Build/Tactical/Soldier Control.cpp
===================================================================
--- Build/Tactical/Soldier Control.cpp  (revision 7650)
+++ Build/Tactical/Soldier Control.cpp  (working copy)
@@ -17432,7 +17432,7 @@
 
        if ( this->bInSector && this->bTeam == gbPlayerNum && !this->bCollapsed )
        {
-               DisplayCover( TRUE );
+               DisplayCover( FALSE );
        }
 }
 



Oh, one last thing, since I notice you are attempting to clean up some of the craziness in the code.

The signature of DisplayCover() is:

void DisplayCover( const BOOLEAN& forceUpdate )


There is no reason to pass a "const BOOLEAN&" when a simple BOOLEAN would do!

EDIT:

I just realized that there should not really be any reason to call DisplayCover() at all, since cover redisplay is handled by another game loop. Removing that if-block entirely has no apparent effect on the tracker display or any other cover display:

Index: Build/Tactical/Soldier Control.cpp
===================================================================
--- Build/Tactical/Soldier Control.cpp  (revision 7650)
+++ Build/Tactical/Soldier Control.cpp  (working copy)
@@ -17429,11 +17429,6 @@
        {
                this->usSoldierFlagMask &= ~SOLDIER_BATTLE_PARTICIPATION;
        }
-
-       if ( this->bInSector && this->bTeam == gbPlayerNum && !this->bCollapsed )
-       {
-               DisplayCover( TRUE );
-       }
 }
 
 // check if Soldier can use the spell skillwise, with fAPCheck = TRUE also check current APs


[Updated on: Tue, 11 November 2014 03:51] by Moderator

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