[fixed] bad slowdown shortly after game starts ( rev 2849 )

[titi]

To see teh problem, just start any kind of setup ( best is you alone without oponent ).
Once the game started don't move the camera position and switch debug info on to see the fps.
Now move the camera ( just a tiny bit with the cursor keys ).

=> you will immidialy see a big fps loss
Examples:
for me ( geforce 9600GT 160 fps down to 100 fps )
tomreyn ( 60 fps -> 30 fps )

We also had this fps loss in 3.5.2, but it was less worse  ( for me 160 fps -> 130 fps )

( Is there some kind of cache management going mad ? )

[softcoder]

please try svn, i just updated the new font renderer. Also to test ftgl run with --force-ftglfonts and let me know how fps compares?

[tomreyn]

It's 60 to 45 FPS now, and I need to move the camera more. It never recovers though.

[will]

I haven't investigated but i imagine you are describing how much faster it renders at game start before shadows are turned on?

[tomreyn]

That's after shadows are active. I still get 60 FPS then, but it decreases as soon as you move the camera.

It is now (r2860) 60 FPS to 45 FPS (and only after you move the camera further), so less of a problem. However once it went down to 45 FPS it will never get any higher.

[titi]

I think it has something to do with renderObjects. Its also used when you render shadows.

comment out renderObjects in game.cpp line 2672 ( renderer.renderObjects(avgRenderFps)
and line 2635 ( renderer.renderShadowsToTexture(avgRenderFps))

beside the effect that you will not see anymore trees and shadows you will see that the fps stay stable.

UPDATE:
renderer.cpp line ~3637 VisibleQuadContainerCache &qCache = getQuadCache();
change this to VisibleQuadContainerCache &qCache = getQuadCache(true,true);

Then you instantly get the slow frame rates you normally get after camera movement. So I think this QuadCache does not work the way it was meant .. )

[softcoder]

I think overall this is no longer an issue as we have improved rendering performance.