how to animate texture coordinate?

[comicsteam]

i know how to use texture animator to change texture for a model
however, this time i need to make a whirlpool
it is better to alter its UV coordinates instead of switching among textures
is it possible to animate texture coordinates of a model?

[hybrid]

Yes, of course. Since your tc transformations are probably possible with a texture matrix it's most efficient to use it as the animated object. Simply set the new matrix values instead of the next texture in your animator.

[vitek]

I don't know if you've thought about it yet, but it might be a good idea to write your own scene node animator that does the texture matrix manipulation for you.

Travis

[comicsteam]

Yes, of course. Since your tc transformations are probably possible with a texture matrix it's most efficient to use it as the animated object. Simply set the new matrix values instead of the next texture in your animator.

thanks for your suggestion
i have tried to use the texture matrix
here's my code:

Code: Select all

_sceneNode->getMaterial(1).getTextureMatrix(0).setTextureTranslate(time*0.0,time*0.0001);

the texture coordinates altered, but the result seems strange.

it seems jittered and has some kind of "glossy" effect
what's wrong with this line of code?

another question, what is the difference between setTextureTranslate and setTextureTranslateTransposed?

[zillion42]

a shader can also do that quite easy in fact... the realisticWaterScene node for example moves the bump linear, but I guess if you move 2 or 3 good layers blended (one layer with sudden changes for bubbles and one smooth foam and somehow out.color multipield or added... try) it would look quite nice for a whirlpool

[hybrid]

time*0.0 seems more than odd...

[comicsteam]

a shader can also do that quite easy in fact... the realisticWaterScene node for example moves the bump linear, but I guess if you move 2 or 3 good layers blended (one layer with sudden changes for bubbles and one smooth foam and somehow out.color multipield or added... try) it would look quite nice for a whirlpool

i will try. thanks for your suggestion

time*0.0 seems more than odd...

just because i don't want to change the x value.
same as 0

[bitplane]

Just a thought.. what's "time"? Is it some huge number converted from u32, causing the texture matrix to have a massive Y translation?

[comicsteam]

Just a thought.. what's "time"? Is it some huge number converted from u32, causing the texture matrix to have a massive Y translation?

thanks for your help~! you pointed out the problem
"time" is the system time.
it seems too big for the matrix
i fixed it and now it works.