driving an ICE deformer by weightmap

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julius
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Joined: 12 Jun 2009, 10:56

driving an ICE deformer by weightmap

Post by julius » 29 Jun 2015, 17:17

Hi ICE masters,

I saw that it was possible to drive a particle emission by weight map, but I can not drive a simple geometry turbulence effect by a weight map...
Can anyone give me the trick please ?

thanks

NNois
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Joined: 09 Jun 2009, 20:33

Re: driving an ICE deformer by weightmap

Post by NNois » 29 Jun 2015, 17:39

there is no trick, this just works. can you put a screenshot ?

julius
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Re: driving an ICE deformer by weightmap

Post by julius » 29 Jun 2015, 18:04

thank you NNois,

I saw some nodes in the particle section which seems to do that, but nothing else. As I'm totally novice with ICE, I'm a bit lost and don't really understand where to begin...And did't found any tutorial about this kind of task.

julius
Posts: 248
Joined: 12 Jun 2009, 10:56

Re: driving an ICE deformer by weightmap

Post by julius » 29 Jun 2015, 23:22

ok, so I tried something that seemed logical to me, but don't find the tool wich could let me do what I'm thinking :

I tried to apply a turbulize node to the point of my object and tried to filter the effect by the weightmap's object, but only the "IsElement" mode seems to work, and it include all the points without taking the weights into account.
So I would like to get the resulting movement and multiply it by the weights value, but don't found how to do this

Image

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mattmos
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Re: driving an ICE deformer by weightmap

Post by mattmos » 30 Jun 2015, 10:47

If you connect the weight map value into the turbulize scale input, and the point position directly into the base value, that should be a start. Then if you need to enhance the effect you could use a change range inbetween the weight map and turb scale.

NNois
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Re: driving an ICE deformer by weightmap

Post by NNois » 30 Jun 2015, 14:12

+1 plus don't use this "get weight map value" you don't know what he get , just take a get data and dive to your weight map weights

julius
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Re: driving an ICE deformer by weightmap

Post by julius » 30 Jun 2015, 15:40

thank you very much,

now, the problem is that the turbulence scale doesn't work as expected : it's not a simple factor for the effect... I have to find an other way to attenuate the effect with the weightmap.

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mattmos
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Re: driving an ICE deformer by weightmap

Post by mattmos » 30 Jun 2015, 16:10

Could try a multiply by scalar after the turbulize, with the weightmap as scalar input.

Or a linear interp between pointposition and turbulized pointposition with the weightmap input as blend.

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rray
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Re: driving an ICE deformer by weightmap

Post by rray » 30 Jun 2015, 20:50

another option : weightmap->XYZ ports of a scalar to vector3d->variance

-rr
softimage resources section updated Jan 5th 2024

julius
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Re: driving an ICE deformer by weightmap

Post by julius » 30 Jun 2015, 21:27

yes !!

the linear interpolate method works perfect !

scalar to 3d vector works too, but we lost the variance controls.

thank you all for your suggestions ! :-bd

NNois
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Re: driving an ICE deformer by weightmap

Post by NNois » 30 Jun 2015, 21:53

Sorry this is wrong, using the turbulence scale is not going to work !

The "scale" is the size of the noise in 3d space, basicaly small produce a grainy effect and a large value produce large smooth gradients, so this has to be a fixed value !!!
Use the "variance" instead:
weight map -> scalar to vector -> multiply (this is where you scale the effect) -> to the "variance port" this will work

julius
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Joined: 12 Jun 2009, 10:56

Re: driving an ICE deformer by weightmap

Post by julius » 30 Jun 2015, 22:07

I'm sure it's evident for you, but I'm discovering the power of ICE with your suggestions, multiple ways to do anything....wow !
throwing softimage to the bin is a shame Autodesk !!! ~x(
Last edited by julius on 03 Jul 2015, 23:07, edited 1 time in total.

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FXDude
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Re: driving an ICE deformer by weightmap

Post by FXDude » 03 Jul 2015, 19:48

there is also a nifty "modulate by wheight map" on Rray.de

julius
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Re: driving an ICE deformer by weightmap

Post by julius » 03 Jul 2015, 23:06

thanks, good to know. :)

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