[Bf-committers] Implementing "weight from Bone Glow" as an alternative for "weight from Bone heat" ...

[Daniel Salazar - patazstudio.com]

I hope so man, I'm sure you can get some help. I tried contacting you
on the chat btw.
Daniel Salazar
patazstudio.com


On Mon, Sep 14, 2015 at 12:13 PM, Gaia <gaia.clary at machinimatrix.org> wrote:
> I got a bit scared about implementing this when i looked into it last time.
> Because of this i did not dare to touch this topic again until now.
> well, i try another round now. But i doubt that i can do it easily.
> well, maybe with a bit of help...
>
> cheers,
> Gaia
>
> On 14.09.2015 09:36, Daniel Salazar - patazstudio.com wrote:
>> Hi, what happened to this? Very interested in having this implemented.
>> Daniel Salazar
>> patazstudio.com
>>
>>
>> On Sun, May 3, 2015 at 5:39 AM, Brecht Van Lommel
>> <brechtvanlommel at pandora.be> wrote:
>>> Hi,
>>>
>>> On Sun, May 3, 2015 at 12:38 PM, Gaia <gaia.clary at machinimatrix.org> wrote:
>>>> 1.) Both algorithms work by first calculating an initial set of weights for a
>>>> given skin/skeleton combination, then this initial set is smoothed by
>>>> applying a diffusion equation.
>>>> 2.) Bone heat and Bone glow differ "only" in the way how they calculate
>>>> the initial set of weights. The following diffusion calculation is the same
>>>> for both.
>>> That seems right.
>>>
>>>> meshlaplacian.c (line 624): heat_bone_weighting()
>>>>
>>>> I understand it like this:
>>>>
>>>> 654-678 Mask for only working on selected vertices/bones
>>>> 680-700 Initial setup of the data for the calculations
>>>> 701-720 clear all weights from weight groups
>>>> 731     This seems to be where "everything" happensin one step
>>>> 732-776 copy the calculated weights to the vertex groups
>>>>
>>>> I believe that i "only" have to modify what happens in line 731, but
>>>> my problem is how can i change what happens in that function?
>>> The linear system is solved at line 731, but it's only the
>>> construction of the system that needs to change.
>>>
>>> You need to modify heat_set_H where the values heat.H and heat.p are
>>> computed, these correspond to the H and p in the original and new
>>> paper. At lines 726-728 these values are set into the right hand side
>>> of the linear system. The heat_source_closest test there may also need
>>> to change if visibility is no longer a binary value.
>>>
>>> Brecht.
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