Re: Math behind Smooth Weights

[pedro santos]

Martin I made a compound some time ago that might help it mimics what XSI
Smooth Weights does, but with an addition that I always missed: Iterations.
It's a smooth after all so sometimes you want some settings to repeat and
instead of adding multiple smooth operators one could just add more
iterations.

http://probiner.xyz/2015/02/05/ice-envelope-weights-utilities/
pb_SmoothEnvelopeWeights.xsicompound

It's slow by the way :) Just made it to trace the algorithm.

Cheers












On Fri, Jan 27, 2017 at 2:39 PM, Martin Yara  wrote:

> Thanks Matt, I kinda understand the logic, but I can't figure out how to
> do it yet. I'll have to study it a little more.
>
> Thanks Michael, but he is using just the default smooth brush and the
> default Weight Hammer.
>
> Using Maya's brush (artUserPaintCtx) through scripting without a brush has
> better results than Weight Hammer sometimes, but you can't undo.
>
> I guess I'll have to keep my Maya to Softimage workflow until I find
> something better.
>
> Martin
>
> On Fri, Jan 27, 2017 at 10:09 PM, michael malinowski <
> hejherb...@hotmail.com> wrote:
>
>> Hey Martin,
>>
>> This tool has a similar smoothing brush in it. It's all python so you can
>> browse the math behind it there if you didn't want to use the tool in its
>> entirety.
>>
>> Maya has a long way to go before it's skinning tools have any sort of
>> parity with Soft!
>>
>> https://www.highend3d.com/maya/script/skinning-tool-for-maya
>>
>> Mike
>>
>> On 27 Jan 2017, at 11:07, Martin Yara  wrote:
>>
>> Hi, Does any have some light to shed about this ?
>>
>> I really like Softimage's Smooth Weights, and really hate Maya's Weight
>> Hammer. So I would like to implement, if it is possible, a Smooth Weights
>> tool for Maya that work as good as the SI one, or at least better than
>> Weight Hammer.
>>
>> Meanwhile I'm just sending my data to Softimage, work with weights in
>> Softimage (way faster!) and then send only the weights data in a custom
>> format back to Maya.
>>
>> Martin
>>
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>
>
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Re: Math behind Smooth Weights

[wavo]

Iam not a Maya-user,


but what about with this plugin http://www.ngskintools.com/features/


Iam still not a Maya-user,

Walter


Am 1/27/2017 um 3:39 PM schrieb Martin Yara:
Thanks Matt, I kinda understand the logic, but I can't figure out how 
to do it yet. I'll have to study it a little more.


Thanks Michael, but he is using just the default smooth brush and the 
default Weight Hammer.


Using Maya's brush (artUserPaintCtx) through scripting without a brush 
has better results than Weight Hammer sometimes, but you can't undo.


I guess I'll have to keep my Maya to Softimage workflow until I find 
something better.


Martin

On Fri, Jan 27, 2017 at 10:09 PM, michael malinowski 
> wrote:


Hey Martin,

This tool has a similar smoothing brush in it. It's all python so
you can browse the math behind it there if you didn't want to use
the tool in its entirety.

Maya has a long way to go before it's skinning tools have any sort
of parity with Soft!

https://www.highend3d.com/maya/script/skinning-tool-for-maya


Mike

On 27 Jan 2017, at 11:07, Martin Yara > wrote:


Hi, Does any have some light to shed about this ?

I really like Softimage's Smooth Weights, and really hate Maya's
Weight Hammer. So I would like to implement, if it is possible, a
Smooth Weights tool for Maya that work as good as the SI one, or
at least better than Weight Hammer.

Meanwhile I'm just sending my data to Softimage, work with
weights in Softimage (way faster!) and then send only the weights
data in a custom format back to Maya.

Martin
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Re: Math behind Smooth Weights

[Martin Yara]

Thanks Matt, I kinda understand the logic, but I can't figure out how to do
it yet. I'll have to study it a little more.

Thanks Michael, but he is using just the default smooth brush and the
default Weight Hammer.

Using Maya's brush (artUserPaintCtx) through scripting without a brush has
better results than Weight Hammer sometimes, but you can't undo.

I guess I'll have to keep my Maya to Softimage workflow until I find
something better.

Martin

On Fri, Jan 27, 2017 at 10:09 PM, michael malinowski  wrote:

> Hey Martin,
>
> This tool has a similar smoothing brush in it. It's all python so you can
> browse the math behind it there if you didn't want to use the tool in its
> entirety.
>
> Maya has a long way to go before it's skinning tools have any sort of
> parity with Soft!
>
> https://www.highend3d.com/maya/script/skinning-tool-for-maya
>
> Mike
>
> On 27 Jan 2017, at 11:07, Martin Yara  wrote:
>
> Hi, Does any have some light to shed about this ?
>
> I really like Softimage's Smooth Weights, and really hate Maya's Weight
> Hammer. So I would like to implement, if it is possible, a Smooth Weights
> tool for Maya that work as good as the SI one, or at least better than
> Weight Hammer.
>
> Meanwhile I'm just sending my data to Softimage, work with weights in
> Softimage (way faster!) and then send only the weights data in a custom
> format back to Maya.
>
> Martin
>
> --
> Softimage Mailing List.
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> with "unsubscribe" in the subject, and reply to confirm.
>
>
> --
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Re: Math behind Smooth Weights

[michael malinowski]

Hey Martin,

This tool has a similar smoothing brush in it. It's all python so you can 
browse the math behind it there if you didn't want to use the tool in its 
entirety.

Maya has a long way to go before it's skinning tools have any sort of parity 
with Soft!

https://www.highend3d.com/maya/script/skinning-tool-for-maya

Mike

On 27 Jan 2017, at 11:07, Martin Yara 
> wrote:

Hi, Does any have some light to shed about this ?

I really like Softimage's Smooth Weights, and really hate Maya's Weight Hammer. 
So I would like to implement, if it is possible, a Smooth Weights tool for Maya 
that work as good as the SI one, or at least better than Weight Hammer.

Meanwhile I'm just sending my data to Softimage, work with weights in Softimage 
(way faster!) and then send only the weights data in a custom format back to 
Maya.

Martin
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Re: Math behind Smooth Weights

[Matt Lind]

I had to write my own version of this tool due to an undesired behavior in 
the Softimage version.  The math is basically the same as a paint brush in a 
paint program.

You define a radius centered on the point being smoothed, as well as a 
falloff function which determines how influence of the neighbors diminishes 
with distance (e.g. linear, gaussian, cubic, ...).  Points closer to the 
center are given proportionally greater consideration than those further 
away.  Quality of the smooth is determined by the falloff function you 
choose, as well as your ability to properly compute the distance from the 
modified point to the surrounding points under consideration.  The Softimage 
smooth tool will include the weight of the point being smoothed in the 
calculation, but this is usually undesired as it adds weight to the result.

That's it.


Matt




Date: Thu, 26 Jan 2017 02:11:37 +0900
From: Martin 
Subject: Re: Math behind Smooth Weights
To: "Official Softimage Users Mailing List.


Hi, Does any have some light to shed about this ?

I really like Softimage's Smooth Weights, and really hate Maya's Weight 
Hammer. So I would like to implement, if it is possible, a Smooth Weights 
tool for Maya that work as good as the SI one, or at least better than 
Weight Hammer.

Meanwhile I'm just sending my data to Softimage, work with weights in 
Softimage (way faster!) and then send only the weights data in a custom 
format back to Maya.

Martin


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Re: No -seriously, why don?t we GUMROAD for Softimage?

[Matt Lind]

That's a management issue, not a technical issue.

Matt


Date: Thu, 26 Jan 2017 00:09:57 -0500
From: Pierre Schiller 
Subject: Re: No -seriously, why don?t we GUMROAD for Softimage?
To: "Official Softimage Users Mailing List.

Thank you for your reply Matt and very interesting details about the
insides of the SDK.
I still use mental ray for some things. So it?s all cool there :D

Let?s tackle one question at the time:
How possible is it to integrate 3 guys working on separate locations of the
planet to ally and work and build
on 1 single softimage environement many 3d assets?

Regards.


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Math behind Smooth Weights

[Martin Yara]

Hi, Does any have some light to shed about this ?

I really like Softimage's Smooth Weights, and really hate Maya's Weight
Hammer. So I would like to implement, if it is possible, a Smooth Weights
tool for Maya that work as good as the SI one, or at least better than
Weight Hammer.

Meanwhile I'm just sending my data to Softimage, work with weights in
Softimage (way faster!) and then send only the weights data in a custom
format back to Maya.

Martin
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