animated weightmaps

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Stefan Andersson

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Feb 6, 2012, 5:40:54 AM2/6/12
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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



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


Andreas Bystrom

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Feb 6, 2012, 5:43:51 AM2/6/12
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well you can just use ice to set a weightmap based on a texture map property no?
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Andreas Byström
Lighting TD - Weta Digital

Andi Farhall

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Feb 6, 2012, 5:45:24 AM2/6/12
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ICE?

 

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

 

could work?

 

A>

Stefan Andersson

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Feb 6, 2012, 6:49:47 AM2/6/12
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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

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Feb 6, 2012, 6:56:00 AM2/6/12
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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!

Peter Agg

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Feb 6, 2012, 6:57:40 AM2/6/12
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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

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Feb 6, 2012, 7:02:40 AM2/6/12
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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.
TextureMapsHowTo.jpg

Sandy Sutherland

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Feb 6, 2012, 7:03:09 AM2/6/12
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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

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