[Bf-committers] M-Def Binding Accelerator

[Bassam Kurdali]

I've used it hear on tube also, pretty heavy character, with no issues.
I'm also convinced that if you guys say there are issues with corner
cases, that is indeed true however:

It is *so much* faster that I don't even consider binding with the other
tool. The only time I would if there was a considerable fail, and I
rebound. The question I have is: would the differences (in working
conditions) be small enough that both methods could be included, as an
option (fast vs. accurate perhaps? and a tooltip that explains the
benefits) for now? then the benefit would be, as a trunk code and not a
languishing patch it would get more eyeballs and perhaps in the future,
the option gets removed...

my 2c as one of the (I suspect not huge) number of people doing rigging
with blender, and using mdef for it, on heavy characters.
Bassam.

On Tue, 2012-09-25 at 11:09 -0300, Juan Pablo Bouza wrote:
> Yep, no difference at all... I've tested it with a 40k human model and there is no noticeable difference between the two bindings at level 7.
> 
> I took the rig far away from its center, rotated it 180 degrees and everything was cool.
> 
> The BVH binding took less than a minute, against 40 minutes with the traditional binding.
> 
> +1 for Zanqdo!
> 
> 
> > From: zanqdo at gmail.com
> > Date: Mon, 24 Sep 2012 13:26:00 -0600
> > To: bf-committers at blender.org
> > Subject: [Bf-committers] M-Def Binding Accelerator
> > 
> > Hi, there has been a patch for dramatically accelerating MDef binding
> > using BVH for around a year and a half. You can see the code review
> > here http://codereview.appspot.com/4529048/
> > 
> > And this is the updated patch for r50858 (thanks dfelinto)
> > http://www.pasteall.org/35522/diff
> > 
> > There where some concerns about precision so I proposed to do some
> > tests. Here's a comparison between the deformation result of a
> > character binded with trunk vs patched build
> > 
> > Active object is binded with the patch and orange (selected) object is
> > binded with plain trunk
> > 
> > http://www.3developer.com/tmp/mdef.png
> > 
> > I have highlighted the areas that showed some deviation from trunk.
> > This mesh is highly distorted by the mdef and moved many meters away
> > from the original position.
> > 
> > The strongest deviations are of about 0.002m
> > 
> > The binding times are 0:14s vs 1:32s, that's a speedup of 650%
> > 
> > On the practical side I have been using this patch since it first
> > appeared to bind many complex characters and I've got no problems with
> > it
> > 
> > Could we get it in for 2.65?
> > 
> > Cheers!
> > 
> > Daniel Salazar
> > patazstudio.com
> > _______________________________________________
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> > Bf-committers at blender.org
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