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  Slick2D : Incorrect sub pixel rendering  (Read 887 times)
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Offline watacoso

Junior Newbie





« Posted 2013-09-17 19:53:09 »

Hello there. it's a long while since i started searching cause and solution of this problem. That said, even searching on this forum, i couldn't find anything. heck, i am struggling on even finding a definition of the problem! xD

So, let me explain. I got a game where the scene can be zoomed in/out.

so i scale the scene. and the sprites ( and all the things drawn with Graphics) go bananas.

here's an example on a sprite placeholder for the floor tiles

https://www.dropbox.com/s/05878bt489tda19/flicker-1.png

and here's the result when i render it, after i zoomed out

https://www.dropbox.com/s/p1yumjqzt3c0uaf/flicker-2.png

of course when the camera moves it's even more horrible T_T

the problem happens with both i methods i know to scale images/things into slick2d:

-g.scale(f1,f2) on the rendering block;
-calculating position and size of the game entities relative to the zooming value ( we used this because we did not know about the g.scale feature);

i hoped the problem was caused by our code, but since even the first method causes the same problem, i am clueless :\

yes, i already tried to disable/enable vSynch. yes, i already tried enabling/disabling anti aliasing. and yes, i even tried setFilter(Image.FILTER_NEAREST).

i would even be ok with knowing the definition of this glitch, if it has any Tongue thank you for your patience on reading this and eventually freeing me from the frustration of this problem Cheesy
Offline RobinB

JGO Ninja


Medals: 44
Projects: 1
Exp: 3 years


Spacegame in progress


« Reply #1 - Posted 2013-09-17 21:41:56 »

In this problem, setFilter(Image.FILTER_NEAREST) is exactly the opposite of what you want.
Try setFilter(Image.FILTER_LINEAR) on the MIN filter (do not know how this is done in slick2D).
Also, look into mipmapping.
Offline watacoso

Junior Newbie





« Reply #2 - Posted 2013-09-18 12:13:08 »

thank you! i searched on the internet about mipmapping (and also joined the lwjgl irc channel :3) and now i solved the problem Cheesy though now i discovered that i also have tile bleeding issuses. however i think i should be able to find a solution for that by myself :3 thank you again.
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