UV scale/rotate/tiling without shaders

[alko]

How to change texture UV coords on plane-mesh without help shaders (because i need to launch on retro-pc with voodoo 3dfx).
Also i need to enable flag GL_REPEAT (for unlimited scroll texture)

[CuteAlien]

There's 2 ways. First meshbuffers are made of vertices, usually S3DVertex: http://irrlicht.sourceforge.net/docu/st ... ertex.html
So it's possible to change the TCoords in there.

The other way is going over the material when drawing. SMaterial has a setTextureMatrix function which allows you set a matrix which modifies the texture drawing.

SMaterialLayer (in SMaterial you got a member TextureLayer which has one SMaterialLayer per texture) has TextureWrapU and TextureWrapV members. They can be set to irr::video::ETC_REPEAT, thought that is the default already so you'll only need it to set one of the other E_TEXTURE_CLAMP values: http://irrlicht.sourceforge.net/docu/na ... f84b39811f

[alko]

I'm trying this

Code: Select all

 
float scroll;
...
//main loop
scroll += 1;
fognode->getMaterial(0).getTextureMatrix(0).setTranslation(vector3df(scroll,scroll,0));
...
 

but no result

[CuteAlien]

Yeah, that's for 3d transformations. Look at all the matrix functions which have "texture" in the name, those will work with the kind of matrix you'll need here.

[alko]

Strange...
Rotation and scaling is work (setRotation (), setScale() ) .
But scrolling does not work.
Hmm...

[CuteAlien]

Do you try to do that at the same time? If so - don't. I've not checked right now, but could be values do overwrite each other and you can only set them independent and then mulitply the matrixes to get a combined result.

[alko]

Do you try to do that at the same time?

Nope. I use this functions separately

by the way, engine version is 1.7.3 (for run under win98SE)
maybe there are bug in this version?

[alko]

Code: Select all

fognode->getMaterial(0).getTextureMatrix(0).setTextureTranslate(scroll,scroll);

it's worked

[CuteAlien]

Ah good. And I thought Irrlicht 1.8 also still runs on Windows98, didn't know there are any troubles.