problem switching to Irrlicht 1.4.2

Acki · Post by **Acki** » Wed Nov 05, 2008 4:17 pm

I hate to say this (no, I love it

) but it seems I discovered this already some times ago:
http://irrlicht.sourceforge.net/phpBB2/ ... hp?t=27790

with my (debuged) version I have no problems loading this map:

Masterhawk · Post by **Masterhawk** » Wed Nov 05, 2008 10:56 pm

Bad news for me
Neither the compiled svn/trunk nor the files from Acki gave me the expected results.

I guess I tried nearly all possible variations

Will have another try tomorrow

Acki · Post by **Acki** » Thu Nov 06, 2008 12:35 am

Masterhawk wrote:Neither the compiled svn/trunk nor the files from Acki gave me the expected results.

uhhh, this made me curious, so I did some testings with my patched files...
and something very strange turned out:
if you compile Irrlicht in debug mode then it doesn't work (no textures are loaded) !!!

you'll have to compile the dll in release mode and everything is fine !!!

EDIT: it's even stranger !!!
I tried to track down the exact cause and it's not the DEBUG define, but an optimization flag !!!

in release mode I use "Optimize fully (for speed) [-O3]" !!!
if you disable this optimization flag the textures are not found, only if this flag is enabled it works correctly !!!
maybe it also works with the other speed optimizations (-O, -O1 and -O2) - didn't test them...

EDIT 2: ok, I also tested the other opt. flags and it turned out that the textures are only loaded if -O2 or -O3 is enabled !!!

but it's really over my head why !?!?!

hybrid · Post by **hybrid** » Thu Nov 06, 2008 8:19 am

For me (with Linux and latest SVN/trunk) this works with or without optimization. The textures also loaded correctly even with older revisions, but were multiply loaded. I've not yet checked with 1.4.x.

Masterhawk · Post by **Masterhawk** » Thu Nov 06, 2008 11:37 am

While my today's testings I noticed that the result depends on the driver I choose:

svn/trunk [compiled as release]: Multiple texture loadings

[OpenGL] corrupted textures
[SOFTWARE + BURNINGSVIDEO] correct display of the textures

I cannot test this with DirectX9 since I have no compiled-in dx9 irrlicht dll.

The optimization, whether it was -O2 or -O3, had any effect on the result

EDIT:
[Irrlicht 1.4.2 + Acki's files]
In Debug mode there occur very strange results

Acki · Post by **Acki** » Thu Nov 06, 2008 1:56 pm

Masterhawk wrote: [Irrlicht 1.4.2 + Acki's files]
In Debug mode there occur very strange results

yes, that's what I get without -O2 and -O3, too:

Masterhawk · Post by **Masterhawk** » Thu Nov 06, 2008 2:34 pm

With [Irrlicht 1.4.2 + Acki files + DEBUG + -O2] the textures load only once but the corrupted textures still remain.
@Acki: Do the textures are also displayed correct when you use OPEN_GL as renderer?

Acki · Post by **Acki** » Thu Nov 06, 2008 3:54 pm

Masterhawk wrote:@Acki: Do the textures are also displayed correct when you use OPEN_GL as renderer?

yes, everything is fine with all drivers (SW, BV, OGL, DX8 and DX9):

bitplane · Post by **bitplane** » Thu Nov 06, 2008 5:38 pm

Looks like corrupted texture problem is caused by mipmaps not being generated correctly on your system, and is completely unrelated to the My3D loading problems. I'm guessing this is due to your graphics drivers saying they can create mipmaps but failing to do so on NPOT textures.
So what's your graphics card, OS and driver version? Is it an Intel mobile driver under Linux?

hybrid · Post by **hybrid** » Thu Nov 06, 2008 5:45 pm

BTW: Just tested with the 1.4.x branch (still under Linux), working without problems

Masterhawk · Post by **Masterhawk** » Thu Nov 06, 2008 5:46 pm

My Sys:

CPU: AMD 64 4000+
GPU: ATI 1800XT
Graphics Driver: Catalyst 8.9
OS: Windows XP SP3
IDE: VS2008

The strange thing is, that the problem didn't occur with irrlicht 1.1

@hybrid: what's your gpu?

bitplane · Post by **bitplane** » Thu Nov 06, 2008 6:06 pm

ATI non power of two texture support in OpenGL just sucks.

To get rid of the corruption, try scaling your textures to the nearest powers of two. std_stone_003.jpg looks fine in your screenshot, and that's 256x256

Masterhawk · Post by **Masterhawk** » Thu Nov 06, 2008 7:28 pm

@bitplane: thx, i will try that asap

EDIT: Well I have to say...it works! I have no more crippled textures.
But now I have nearly the same problem Acki has. When I run the app from my IDE everything works fine but when I execute it via double-click the textures are gone. The error is nearly the same like on the upper pictures on this page.

EDIT2: Well finally I tested all possible variations.

[1.4.2 + Acki Files] corrupted filenames (no texture loadings) when run outside the IDE

[svn/trunk] multiple loadings of the textures

[svn/branch] everything works fine!!! just tested it with the small example but i guess it will work with my game, too!