All language subtitles for 04-05 Side and hips motion

- [Instructor] This is the last video

to create the base motion of our robot

where we will add some side to side motion

to the torso and the
beat of hips rotation.

So I'm starting with the root top.

So controller selected and the
X location curve available.

The motion is pretty simple.

When the character is
raising one of its leg

and putting its weight onto the other,

its whole body will shift to towards

the foots that is in
contact with the ground.

So basically if we have
a look to the curve

the weight will shift to
what the robot left side

until frame 14 and which
is the passing pose

where the right leg is in
the middle of the robot.

On frame 14 to frame 22, the
body will slightly move back

to the right by the
weight of the right foot.

And we have an acceleration

of the right foot contact the ground

and the whole body is falling down.

It's also shifting rapidly to
wild the new contacting foot

transferring it's weight
onto it's right leg.

Since we have a symmetrical cycle

we can then reproduce this
motion in the other way.

Again, there is not that much more to say

and to get this concept about
rhythm and weight shifting.

It's just a matter of
playing with the curve

to get the right momentum,
to get the right motion.

Then with this method,
the layer and method,

just try to keep your
curves as clean as possible.

Not adding too much key frames

especially if they are useless,
is that you can easily tweak

and adjust those values later on.

When you're happy with
the result, don't forget

to align the very first
key and the very last

so that you get a proper cycle.

To create the rotation motion of the hips,

I've used the same method.

I've started from the front view

working on the Y axis of the hips.

It's the left to right twisting motion.

When you are putting
your weight onto one leg

as you straighten this
leg, your hips will raise.

So the hips doesn't only react
to the weight of the body

but also to the contact
of the foot on the ground.

So we could think that they
are following the motion.

But they also lead the animation

since they are used to pull the foot up.

When the robot would be on one foot

the hips will tilt towards this foot.

And as the opposite foot
will leave the ground,

the hips will start rotating
towards the raising foot.

But still farther raising
the foot on the ground.

And as our robot character hit the ground

with the opposite foot, then
the hips will rapidly shift

to one, the foot that just enter
in contact with the ground.

And what I did is that
I had a little bounce

in the curve to create an hip shake

that make our robot who came
more clunky and robotic.

As we did before with the toes.

When they was done with that,

I worked on the rotation curve.

I kept it very simple,

just imaging the hips, pulling the foot.

So when the right foot is forward

and hit the ground into its contact pose,

the hips controller is rotating
towards the other foot.

And has reach it's extreme
pose a couple of frame before

because it's leading the
animation, pulling the feet.

So the hips rotate toward the
left to pull the right leg

and as the right foot contact
the ground, the hips has

already started rotating
the other way a little bit.

The next video will be a short time-lapse

showing you those steps.

I've just explained if needed.

And then we will see different techniques

on all to use the base motion.

We have created to add it

to the different parts of the robot.