Rotate a texture by....

tuxmask75

Rotate a texture based on camera rotation, world position, or screen rotation?

Starting with this set up (linked below) and a parameter plugged into time, I can rotate the texture manually, threw code or kismet. but I wonder if it can be done 100 % inside the shader itself.
http://www.plugh.co.uk/images/stuff/scale-rotate-offset.jpg

Obscura

I'm not really sure about this is what you are looking for, because its also not really clear what you want, but have you tried plugging the screen pos (screen align checked) into the texture coordinates?

If this is not what you want, then could you show an example or something?

tuxmask75

Obscura wrote: »

I'm not really sure about this is what you are looking for, because its also not really clear what you want, but have you tried plugging the screen pos (screen align checked) into the texture coordinates?

If this is not what you want, then could you show an example or something?

Yeah I fiddled around with the screen pos a bit, Did not give the intended result .
What I have going on is a level rotates upside down, and I need the texture coordinate colors to rotate when the level rotates.

Obscura

Hmm. Then I think you need a simple parameter for the texture rotation, and you need material instance, so it could be manipulated through kismet/matinee. And the matinee material changing would be triggered by the same thing as what triggers the level rotation.

tuxmask75

yeah I figured as much, in fact I already got that set up, however I was looking for a way to do it threw material only.

Obscura

I think that is not possible

tuxmask75

That sucks, >___<.

Thanks for the help though.

Obscura

Its because there is no way to tell the material, when the level gets rotated, without kismet/matinee.

tuxmask75

if there is some way to simulate the screen coordinate textures to force them to always face the same direction up as the screenposiion. this would work too. ( sadly i'm not very technical in these matters)

tuxmask75

tangent space matrices to transform a world up vector to texture space... how would one pull this off?