animated weightmaps

[Stefan Andersson]

Hi All,

There was a little plugin from lamaison a while back which enabled you to use image sequences as weightmaps (if I remember correctly). And if I also remember correctly that one was only availble for Windows.

So...

it would be awesome if it was possible to use a scalar image as a weightmap so that I could animated it and emit particles from that.

So.. 

any tricks on how to get that to work?

regards

stefan andersson

--

STEFAN ANDERSSON // Creative Director // Mad Crew AB // http://www.madcrew.se

[Andreas Bystrom]

well you can just use ice to set a weightmap based on a texture map property no?

--
Andreas Byström
Lighting TD - Weta Digital

[Andi Farhall]

ICE?

 

Get Point Texture Map Color -> color to rgba -> set data on the weightmap

 

could work?

 

A>

[Stefan Andersson]

The problem with using a texture is that you need an insane amount of polygons for have some detail. It's the main problem with using weightmaps. So I was wondering if there is a way around it. It would be better if it actually could do a texture lookup and see what value the pixel has. Somehow it seems possible, I just don't know where to begin. Or if the ICE tree would be too heavy to calculate.

So a scalar image on a lowres geometry would be the ideal solution.

regards

stefan andersson

[Matt Morris]

Do a search for pixel partilces on  http://rray.de/xsi/ 

Should be able to use it to do what you need, though it could be quite heavy. I'd prob just get a local subdivide duplicate mesh with a weightmap on it as a hacky quickfix!

--
www.matinai.com

[Peter Agg]

You could still check a TextureMap and then delete at a certain value on Emit - no need to use weightmaps at all then. The only problem is that you'd have to overload the emittion rate to take into account the fact that you'd be deleting a number of them.

On 6 February 2012 11:49, Stefan Andersson <ste...@madcrew.se> wrote:

[Leonard Koch]

Yep, that's easily possible.

Just create a texturemap on an object, select a projection and an image for the texturemap to use and then build the icetree shown in the image on your object.

Hope this helps.

[Sandy Sutherland]

If you use a texture map property - you can bring this into the ICE tree and using closest location of similar - read the value - this is how we are getting texture map colour onto strand fur and feathers!

S.

_____________________________
Sandy Sutherland
Technical Supervisor
sandy.su...@triggerfish.co.za
_____________________________

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From: softimag...@listproc.autodesk.com [softimag...@listproc.autodesk.com] on behalf of Stefan Andersson [ste...@madcrew.se]
Sent: 06 February 2012 13:49
To: soft...@listproc.autodesk.com
Subject: Re: animated weightmaps