Edited at https://subtitletools.com
So now we have our main keys we can actually take a look at breaking this down even further.
And it's really easy to get overwhelmed with animation and think oh my gosh I have you know we only
did four keyframes basically because again that last one is mirrored.
It's the same keyframe as the first frame as frame Fortier's.
So we're really did you know four poses here.
And when we look at this animation we have 40 frames when we think oh my gosh I have to do this 10 times
what I already did you know don't get overwhelmed.
Well let's break this down.
Let's drag the timeline.
This is what I'd like to do.
You know what.
Just focus on between two key frames.
OK.
Once we have the keys in now we can just take it in piecemeal down.
OK.
We just have this motion to worry about now.
Don't worry about anything else.
Are you going to get this looking right.
OK.
So when you look at this we can think OK this is the extreme pose.
Right.
That's the technical term the extreme pose these are the furthest that these two legs are going to be
apart from each other.
Those are the extreme distances.
And when we think about extreme distances we also have to think.
All right.
How's this weight being carried.
Is it if it's a tripod and the weight is very far out there and there's a lot of weight here in the
center of gravity.
It's going to want to fall down and while you're walking for these next few frames before this foot
picks up the weight your body will be going down because basically walking is controlled falling and
your foot the foot in front is basically catching you.
Each time that you fall.
So if that's the case then we can know that this center of gravity which actually made it keyframe here
is going to delete in my little example there that this key this center of gravity is not going to be
going up immediately.
Right.
Because this foot hasn't had time to really catch the weight of everything yet.
So what's going to actually happen is this what's going to be going down.
OK.
So we can maybe come out here three frames and keep this down.
I mean it's space bar.
I have the same set up I had from the previous lesson.
So I have the graph down here another panel I'm just I just want to go a little bit past where we started
here.
Right.
And the other thing we need to do is get this foot flat because your foot doesn't just hang out on the
heel here.
So when we're going you know you're just sliding on the heel.
That's not realistic.
Need to get this foot roll down to zero.
So let's get that to zero.
And then you can see that the leg is very straight and that can help us guide us to kind of know biomechanically
how far down with this yogini to go to keep that knee from popping and getting too straight because
if we were up here with the center of gravity then the leg would be far too straight and it would be
a pop right when the foot goes flat.
The knee would be very hyper extended to the point they would pop right here so we can use the fact
that we know the foot needs to be on the ground to drag.
I'm just shift middle mouse dragging this keyframe down to a point where the knee is no longer you know
stretch beyond where it would be hyper extended.
OK.
So now when we play this back the knees shouldn't pop and this plane back a little fast but we can scrub
this we can see it's kind of getting hyperextended here and we can fix that by let's go into the center
of gravity and instead of having an auto tangent where it will slowly go down we probably need to make
this to be straight or straight down so we can grab these tangents and middle mouse drag them.
So they're going straight in an easier way to see this would be to go to view infinity.
And now I can see that you know this curve is flatlining here so we can actually say curves post infinity
cycle so that we can see how these now two key frames relate to each other in a cycle which is how we'll
be using them.
So it's good to go ahead and see that now so we can see that that kind of tangent continues nicely down
to the bottom here.
So that should help us a little bit to keep the knee from popping.
It looks like it's still popping a little bit and that could maybe be from the foot.
Look at the foot and the translate Z.
Now any time that we are animating and we're moving at a consistent rate with our feet right.
You have to think about this is a special way to animate that we're animating on the spot meaning he's
staying on the same.
He or she is staying in the same spot.
And in reality there are going to be moving across a distance and if they are moving across a distance
and this foot is going to stay in its place then these need to be linear.
They don't need to be you know nice smooth tangents to go ahead and delete that.
I'm going to select all of these and go to a linear motion here because as soon as this hits the ground
it should be moving.
And in reality we might want to move this foot roll zero back a couple of frames.
So now it's coming down much sooner and it's working a lot nicer.
So as this foot comes down we can see now that it's catching the weight of the center of gravity.
And only after that this is flat and it's catching the weight can the center of gravity go up because
it needs the center of gravity is pushed up by something that just can't float around willy nilly.
We do understand the motivation and the biomechanics of a walk one is actually keeping the center of
gravity from falling over.
Well it's these feet.
All right.
And so these keep it upright so we can see that only after that this takes the weight of the center
of gravity.
Can this go back up.
OK.
So we wait for that to happen.
And then this goes back up.
Right.
And that makes sense.
So now we get into this pose cool and we can go ahead and make these be linear on translate Z on the
other foot as well because we know that's how we're going to be working.
So let's bring this back out to 40.
Just take a look at this one breakdown real quick and see how much that little bit of animation added
We can see the difference between this this foot and this other one you can see all this other one kind
of floats and the foot roll doesn't cut to the ground with the other one the foot Ragatz the ground
pretty well.
Go So it looks like we could probably you know adjust the Y translate now that we have the feet in linear
space member only grab these and now the translate Z is linear.
Now it's also affecting the distance of the you know why translate translates so we could even take
this let's grab the two top ones and let's experiment a little bit and drag these up.
Looks like it won't be enough so maybe we can even bring this up or you mess with the tangent a little
bit.
So we'll see if that helps keep this leg straight because we don't we don't walk bit in need.
So as you do this you might find what you have been animating isn't exactly what you need.
So the other thing to think about is that there's going to be a little motion forward and back as as
você se move para a direita você vai ganhar velocidade e perder velocidade como você está indo empurrar para cima pelo seu pé para cada
empurrar o pé vai empurrar o seu centro de gravidade para a frente um pouco.
Então você pode realmente empurrar o centro de gravidade para frente e então ele pode cair para trás
isso entre.
Então, isso é outra pequena coisa para pensar sobre como este movimento realmente funciona
então vamos fazer isso também.
Quando isso atinge o chão, sabemos que o pé rola, você sabe, talvez dois quadros à frente, eu acredito que é o que
nós fizemos no outro que vai ser zero.
Isso vai ser um pouco e nós vamos fazer alguns quadros mais tarde
o centro de gravidade executa um movimento para mais dois quadros.
Jogue de volta
pode ser um pouco mais que você pode ver isso meio que indo e voltando.
Então nós temos que traduzir Z e então podemos simplesmente arrastá-los para baixo e também podemos ver onde você sabe disso
entre.
Nós não nos sentamos para traduzir Z.
Então, enquanto aqui nós temos isso, você sabe estar no zero.
E esse não foi o caso mais cedo, então vai saltar um pouco mais aqui.
Então vamos apenas arrastar esses valores um pouco para baixo, não queremos ficar muito loucos com isso.
Mas em geral você sabe que não entendemos a ideia de como o centro de gravidade está se movendo
do jeito que é.
Vai se mover muito sutilmente para a frente.
Então, a próxima lição, vamos dar uma olhada nestes joelheiras e terminar de conhecer esses outros
passando posições certas.
Bem aqui o joelho está começando a se curvar muito cedo.
Então, vamos continuar limpando isso e a próxima lição e então passaremos a adicionar a parte superior do corpo.
Obrigado por assistir.