Re: [Plib-users] Texture scaling

[<le...@ci...>]

Quoting Erik Unemyr <un...@et...>:

> Hello,
> 
> I would like to change the scaling of a texture on an object.
> What would be the easiest way to do that?

Official SSG approach: put your object under (kid of) a ssgTextureTransform 
node, where you can issue the transformation you need to apply to the texture.

My preferred: set an object's pre-draw callback which apply the texture matrix:

glmatrixmode GL_TEXTURE;
glloadmatrix <your matrix> or glscale ...;
return 1;

and a post-draw callback to reset the texture matrix:

glmatrixmode GL_TEXTURE;
glloadidentitymatrix;
return 1;

I like the latter since you don't need to rearrange your scene graph, just need 
object's node pointer. So I use it for leaf objects (meshes).

Sorry for the pseudoGLcode, I can never remember exactly the call syntax when 
I'm far from my sources.

> Best regards,
> 
> Erik

Greetings -

Paolo 

-------------------------------------------
Paolo Leoncini
E-mail: p.l...@ci...
-------------------------------------------

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