subtitles for rigging april 2013

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Welcome, we will see

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a small example of how to rig

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it will be quick

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let's see how

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using  Blender 2.66a

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as it is in April 2013 and we can do a good rigging

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or at least an simple basic one

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Let's do a small clothing piece

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the very first thing is to get

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and open

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"Avatar Workbench 2.65.blend"

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You can see that opening it there is an avatar

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which is a female body

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I did in the past a small video showing
how to import

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a male body to be used

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but here you might enable
layer 3 and we get it

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male body is a small news

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of Avatar WorkBench

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Avatar Workbench for who doesn't know you can

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download from blog.machinimatrix.org => avatar workbench here

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we have various versions

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the latest is 2 65

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containing the "default male"
we have seen

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now let's do

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a quick tutorial on how to make a cloth,
let's make a small skirt

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let's call it a

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skirty

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to model a skirty we do "3"

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"5"

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"5"

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build using SHIFT-A

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let's build a

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cylinder

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"s"

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shrink it until it is more or less
close to the size of our skirty

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ok

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lift it up

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let's suppose these are

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the sizes

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we are interested in

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let's remember

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we can keep it this way right now

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we can use the known technique
of shrink-wrap

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let's go in edit mode

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NOTE: in previous video

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I forgot to click on

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the selection of hidden vertices
A, B

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then we select

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we can keep it this way
but let's docontrol-R

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let's make it bigger

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with these vertices

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ok

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what we want to do is to insert

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 shrink-wrap

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 shrink-wrap (go to object mode) we must do it

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including the whole avatar

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probably it is a good idea to select
bottom part and shift select the

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upper part

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control J so now we have a unique mesh object

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this helps us

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here

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we must enlarge a bit: press s

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shift z

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let's enlarge it to be sure it is
completely external to the avatar

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now we go with "3" on the right

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let's add a modifier

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shrink wrap

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we want that

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the target be

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let's go to the end of this table

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use the mouse wheel

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go to "upper body mesh"

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Blender is changing the
cylinder to be

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tightened to the mesh

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let's do it a bit less tight
to have it go out a bit

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just a bit, here it is

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this way is is quite similar to
what we want

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go "tab"

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and make it

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smooth

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to be able to see it better
add a material

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so it is more visible

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set the color to

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a birght green ok

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then to see it press f12

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we are not seeing it..

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but

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go to object mode

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we see that it's enough

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good enough

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if we are satisfied

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apply the modifier

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to apply the modifier go to

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object mode choose the modifier and

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apply it

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now we have this skirty which is
made of 320 vertices

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done, we can fix it

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we could align it you see
there are some imperfections, but it's good enough

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what I wanted to show you is how

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to "parent" the skirty with

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my armature, how we can do it

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go in

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object mode

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select skirty and then shift

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right click we have selected

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two things at the same time
first

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the skirty and then the armature

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press "control p"

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put armature deform with empty groups
this can be ok

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empty groups means that - we can check this

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if we selected only the skirty

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now we have the armature if we
go on the vertices we see

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all the bones

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and we can see the the specific weights (weight paint)

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selecting single bone we see

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it is completely blue

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this is correct

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for these bones, obviously they are blue
since they are higher bones but if we get

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hip this is

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blu but we should color it

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we can exploit the fact that we actually

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have a base coloring in the base avatar

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so we might simply copy

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i.e. take as basis the basic avatar
and copy weights on our piece of clothing

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to do that with the skirty go in object mode

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select base avatar then shirt
and as second and last selection

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the skirty

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go in

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weight paint... when being in weight paint
"weight tools" appear

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here we have some new features in Blender 2.67

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you can choose "transfer weights"
and this is the outstanding function

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not existing before

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select  "transfer weights"
and weights are magically transferred

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check that all vertex groups are transferred

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use the nearest face method (there are other options)
but we are ok with the default

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to begin with

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and to see how you can do we can start with
"hip right" which

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is influencing all this area

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see that here

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it is missing: it should influence also a bit here

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we should fix this

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so that when

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this tigh is raising, it should raise also

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here on the right

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how we can do it easily?
It's simple we just "paint" with a brush

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we say

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"paint with a brush"

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then

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I move a bit also

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the other part

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actually we should do this in such a way
that when we raise this

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it should move the equivalent part at the left

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here again

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we should paint to influence also this

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let's paint it red so to influence

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this part of the skirty

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we are seeing just a simple

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weight paint on a single leg

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to check if this is a good weight painting job
we have taken it from the original avatar

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there are also other parts

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we have this mHipRight but there is also the mHipLeft

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we must do the same job
we have taken the points from

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the other

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it took thos from nearest face

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when skirty was close, but now that the
two parts are a bit separated

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weigth transfer was not able to copy them

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you can use probably other methods

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now the important thing
is to go in object mode

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select instead the armature since
we want to see the pose

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modality

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given that the armature had been parented
we can do "pose mode"

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select the bone, this

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take

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this "rotation" modality

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try to rotate to see

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and we see..

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raising this...

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we get

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now you should repeat this
job to verify

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that, at least for normal movements

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strange things

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are not happening in the final render

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when we see

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like this where movement is excessive

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you can

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go in

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object mode selecting the skirty

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then editing mode

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now...

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there should be a way to see... here

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clicking here you can see
skirty moving

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now you can do various tasks

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fixing the rigging

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we can for instance go with editing

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select

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for instance here I activated

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proportional editing

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do select a vertix like this

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use the arrow because I want

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Here you see

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moving around

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the vertex so to

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in this way I study extreme positions

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and fix various vertices

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we do it as much as possible

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here now

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we are moving too much

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proportional must be modified

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the idea is that

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I try to work

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in order to generate

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I have to tweak this thing

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to avoid this kind of defects
(I'm not very good at this)

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I expect that you can be smarter than me and
succeed in tweak this object

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thing is to test raising something like this

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at the end set it back in pose mode

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object mode

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go back in selection of the armature

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here it is

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go back in selection

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object mode  go in in pose mode here
you select this

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in the pose you can do whatever you want including

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well

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there should be the possibility to reset it

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clear  transformation ok
resetting it in original position

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you see if it is ok

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that is the rest position that now had been spoiled

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don't go in the details

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now the only thing to do is select

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when you finish

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the weight painting

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of the bones. In this case involved bones are these

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basically one (this) the left thigh and the right tigh

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and something more

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if we wanted we could

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study how it is moving

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compared to this bone

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you see that

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must study if this rotation is working too

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so it seems

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there also the rotation of this bone

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no, this is actually that which

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which is moving the avatar (the back bone)

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so basically this bone which can be

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rotated on the left or the right

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must study the way it is evolving in respect to

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these movements

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there are other bones:  1

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2 3 bones

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must study movements of this bones too

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like this

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here must to do this work

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for each bone test all the three possible rotations

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(obviously the human possible)

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when finished use the clear transform all

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ok

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and now

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go in object mode

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select... ( I coudn't select all)

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movement modifications

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There is a pose mode - pose

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to do clear must do

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clear pose for each single bone then I do pose

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clear pose all (here it is!)

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I must do it for all bones I modified

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now we go in object mode and reselect
the skirty

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Press file

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export collada

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possibly we select apply modifiers
and selection only

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export with a different name the skirty

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call it "skirty" or something

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.dae

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00:16:26,330 --> 00:16:32,440
we can save under c:

284
00:16:32,440 --> 00:16:35,760
it didn't work so we do

285
00:16:35,760 --> 00:16:40,330
export again

286
00:16:40,330 --> 00:16:43,080
under c:\

287
00:16:43,080 --> 00:16:45,530
"skirty"

288
00:16:45,530 --> 00:16:46,770
.dae

289
00:16:46,770 --> 00:16:51,500
normally we can write on c if you are administrators

290
00:16:51,500 --> 00:16:55,400
now you can go in

291
00:16:55,400 --> 00:16:59,410
beta grid  for example

292
00:16:59,410 --> 00:17:05,880
if you just wanted to check it

293
00:17:05,880 --> 00:17:12,589
that the skirty has been correctly rigged

294
00:17:12,589 --> 00:17:17,089
let's enter in firestorm

295
00:17:17,089 --> 00:17:18,680
connect to beta grid

296
00:17:18,680 --> 00:17:25,680

297
00:17:33,620 --> 00:17:40,620
(slow as usual)

298
00:17:53,440 --> 00:17:55,070
OK here we are

299
00:17:55,070 --> 00:17:58,040
now we do

300
00:17:58,040 --> 00:17:59,860
build - upload

301
00:17:59,860 --> 00:18:03,360
mesh model

302
00:18:03,360 --> 00:18:09,260
choose c:\ folder

303
00:18:09,260 --> 00:18:11,630
let's upload the skirty

304
00:18:11,630 --> 00:18:14,440
we just

305
00:18:14,440 --> 00:18:21,440
did

306
00:18:25,980 --> 00:18:32,980
now it seems it is not loading :)

307
00:18:37,040 --> 00:18:39,200
here it is

308
00:18:39,200 --> 00:18:43,150
but I did a mistake it loaded

309
00:18:43,150 --> 00:18:47,510
too many things

310
00:18:47,510 --> 00:18:52,540
there is extra stuff I dont want

311
00:18:52,540 --> 00:18:53,940
:(

312
00:18:53,940 --> 00:18:55,050
no

313
00:18:55,050 --> 00:18:57,820
we must redo the export

314
00:18:57,820 --> 00:19:00,600
go back to our blender

315
00:19:00,600 --> 00:19:07,600
being in object mode we have selected the model, but probably

316
00:19:07,620 --> 00:19:09,670
export collada

317
00:19:09,670 --> 00:19:12,280
selection only

318
00:19:12,280 --> 00:19:14,270
apply modifiers

319
00:19:14,270 --> 00:19:15,500
mmm

320
00:19:15,500 --> 00:19:18,990
strange I forgot this selection before

321
00:19:18,990 --> 00:19:24,620
let's save back in c

322
00:19:24,620 --> 00:19:27,490
export it again

323
00:19:27,490 --> 00:19:34,490
do another attempt of uploading it to SL

324
00:19:35,910 --> 00:19:39,180
the skirty

325
00:19:39,180 --> 00:19:41,860
now you see that at this point

326
00:19:41,860 --> 00:19:45,960
it is better

327
00:19:45,960 --> 00:19:48,220
here there is something in the middle

328
00:19:48,220 --> 00:19:53,360
that probably we can get rid of

329
00:19:53,360 --> 00:19:54,380
but

330
00:19:54,380 --> 00:19:56,580
we have more or less the skirty

331
00:19:56,580 --> 00:20:03,580
now you can see that we have "skin weights"
if I  click skin weights

332
00:20:08,830 --> 00:20:15,830
I can see also "joints" so we are sure
that skin weights and joints are present in the model

333
00:20:32,280 --> 00:20:33,450
ok now

334
00:20:33,450 --> 00:20:35,790
let's correct a couple of things

335
00:20:35,790 --> 00:20:37,780
here

336
00:20:37,780 --> 00:20:43,190
I did some changes

337
00:20:43,190 --> 00:20:45,310
removed the faces

338
00:20:45,310 --> 00:20:48,190
on the top and bottom

339
00:20:48,190 --> 00:20:50,560
then I did an extrude

340
00:20:50,560 --> 00:20:54,740
to make it simple I hid the upper body

341
00:20:54,740 --> 00:20:58,210
now during the export phase

342
00:20:58,210 --> 00:21:01,350
export

343
00:21:01,350 --> 00:21:03,560
export collada

344
00:21:03,560 --> 00:21:05,820
now I tried the preset

345
00:21:05,820 --> 00:21:07,800
there is a operator presets

346
00:21:07,800 --> 00:21:12,070
made for rigging object in SL
so we are sure the armature is correctly exported

347
00:21:12,070 --> 00:21:14,500
this way

348
00:21:14,500 --> 00:21:18,170
what I get

349
00:21:18,170 --> 00:21:23,750
is really very meaningful when we do upload

350
00:21:23,750 --> 00:21:27,030
mesh model

351
00:21:27,030 --> 00:21:29,950
skirty

352
00:21:29,950 --> 00:21:33,670
now the cloth is appearing

353
00:21:33,670 --> 00:21:34,920
with

354
00:21:34,920 --> 00:21:36,890
no problems

355
00:21:36,890 --> 00:21:41,200
skin weights and join are visible

356
00:21:41,200 --> 00:21:43,620
so it is decent

357
00:21:43,620 --> 00:21:49,310
remember when you load it

358
00:21:49,310 --> 00:21:54,260
to check to have the include skin weights
option

359
00:21:54,260 --> 00:21:57,120
and include joint positions

360
00:21:57,120 --> 00:22:03,290
so that the model is "well rigged"

361
00:22:03,290 --> 00:22:04,890
and SL can use it

362
00:22:04,890 --> 00:22:07,430
properly

363
00:22:07,430 --> 00:22:10,100
if now we do

364
00:22:10,100 --> 00:22:12,710
double click on this

365
00:22:12,710 --> 00:22:15,370
it will be worn

366
00:22:15,370 --> 00:22:18,580
and when we walk it is moving around

367
00:22:18,580 --> 00:22:22,930
this has the same defects

368
00:22:22,930 --> 00:22:24,220
we have seen

369
00:22:24,220 --> 00:22:26,590
in weight painting

370
00:22:26,590 --> 00:22:30,570
so the main operation is
to be able to do

371
00:22:30,570 --> 00:22:32,600
a correct weight painting

372
00:22:32,600 --> 00:22:38,270
(!))

373
00:22:38,270 --> 00:22:41,670
so now the video has come to an end

374
00:22:41,670 --> 00:22:44,150
we say this is

375
00:22:44,150 --> 00:22:45,490
rigging

376
00:22:45,490 --> 00:22:48,580
as it appears in April 2013

377
00:22:48,580 --> 00:22:51,140

378
00:22:51,140 --> 00:22:53,110
Good Evening and see you next time