Any idea why this sprite bug happens?

MolokoTheMole · Post by **MolokoTheMole** » Mon Mar 07, 2011 9:28 am

As you can see on the screenshot, the soldier should carry only one weapon. But on some systems the weapon is drawn using all sprite animation files at once.

http://npshare.de/files/fa267672/screen ... -06-05.jpg

Normally it uses just one. This is how the sprite file looks like:
http://npshare.de/files/2e0fe9a3/um_sniper.png

This happens on Radeon x1650 with latest Omega drivers. Any idea how to fix this?

Mel · Post by **Mel** » Mon Mar 07, 2011 9:33 am

Looks like the rifle is being draw from all the texture space, not only the part where it should be restricted to.

You could draw a quad whose mapping coordinates corresponded to those of the sprite you need at each time.

MolokoTheMole · Post by **MolokoTheMole** » Mon Mar 07, 2011 10:49 am

Mel wrote:You could draw a quad whose mapping coordinates corresponded to those of the sprite you need at each time.

Yeah that's what I do I just map UV coordinates to the frame. However it doesn't work on that specific system.

hybrid · Post by **hybrid** » Mon Mar 07, 2011 12:51 pm

Do you use manually coded texture coords or texture matrix? What size is the whole sprite?

MolokoTheMole · Post by **MolokoTheMole** » Mon Mar 07, 2011 3:32 pm

The size of the gun sprite is 77x70.
The frame size is 77x14.
I use texture coords in vertices.

The coordinates are calculated from the sprite size.
Based on Texture->getSize().Height

This might be the problem... I remember this function giving different results on some systems. Why would it do that?

REDDemon · Post by **REDDemon** » Mon Mar 07, 2011 4:20 pm

probably if you query hardware features on that system you will notice that NQuad textures are not supported. First you must try giving as input a square texture (possibly a power of 2.. so 128x128?)..

http://irrlicht.sourceforge.net/phpBB2/ ... hp?t=40497

hybrid · Post by **hybrid** » Mon Mar 07, 2011 10:06 pm

Argh, that's probably once more an incomplete NPOT support where either wrapping doesn't work or some other stuff is going on.
What are Omega drivers?

MolokoTheMole · Post by **MolokoTheMole** » Tue Mar 15, 2011 8:30 am

Omega drivers, no idea, I can find out.

Could it a possible fix be a different texture wrapping?

hybrid · Post by **hybrid** » Tue Mar 15, 2011 8:31 am

Yes, sometimes certain wrapping modes are not available with NPOT textures. Or the driver did not properly implement all wrapping modes. Just try some others.