Bake Uvs

[alex-oddbratt]

Hi

I'm wondering if there is a way to key the position of UVs?

the ordinary setKeyframe command doesn't seem to work.

To be correct it seems to work randomly.

Is there really a good way to animate UVs in Maya?

If there now is a way to animate UVs i was also wondering if there is a way to bake animation for UVs?

Any answers would be much appreciated.

[joojaa]

you can animate uvs. tough its npot very intuitively easy.

And you can bake that animation in several ways.

what do you need this for. moving uvs is by the way the second worst way of morphing 2d inages. vector fields as maps being the absolutelyy best (offcourse a uvmap can be gebnerated into thiskind of form)

[alex-oddbratt]

You can animate UVs as long as the shapeNode has a polyTweakUV node connected to it.

But how do you connect a polyTweakUV node to a shapeNode and still keep the placment for each UV point?

Every way i've tried to connect it has either moved the uv's or deleted them (the whole mesh dissapers from the viewport, it's still there but it's invicible).

And when it comes to baking UV animation i haven't found any way that works either. Bake simulation won't recognise the UV's as componets that are keyable as long as there isn't a polyTweakUV node in the hierarchy.

So my problem is basicly: how do i connect a polyTweakUV node to the shape node of an object (where the history has been deleted) without changing the UV positions?

[el-diablo]

I imagine you could move from UV space to 3d space and do a vector render...like 2d motion blur...you could also convert the vertex animation to roto animation and bake the image....or do vertex animation in 0-1 XY, projct UV from 0-1 XY and bake that map in Maya...handling it in Render can be slow with whatever your pipeline will support...so good luck...

[joojaa]

QUOTE(alex.oddbratt @ 04/17/06, 09:32 PM) [snapback]234538[/snapback]
So my problem is basicly: how do i connect a polyTweakUV node to the shape node of an object (where the history has been deleted) without changing the UV positions?

There is a trick here to populate nodes with data for backfeeding. Its as follows connect the output to thet node. then delerte the conection, the datas now cached so your free to reconnect it back!

However in yoru case its not necceserily as easy see maya creates a tweak node auomaticaly wen the need rises in a animation pipe. Soif you connect the shape of a object to a empty shae maya would behave thisway now you could allways just delete the originator but not th tweak. Im not sure if it works but theres no extra overhead to having a aextra cached shape wich dont evealuate except during load

However you dont need a tweak node if you only plane to move the points in the base uv!

PS invisibility is because it has no shadingnode attached (assign it as hader)