So

in this area here there is increase velocity and suddenly there is decrease in velocity

which indicate there is a sum in this area there is some translation going on otherwise

that would continue to go up but it's going down and then it go up again after the impact.

So that's the proof that there is a translation going on.

If I go to Agassi 4N here and I'll put the video also and do the same thing with the

video you will see the same thing.

So in this area there is a decrease in velocity, definitely decrease in velocity which means

that there is a translation going on.

So if we look on all the three together up now we see the whole motion and I'll go back

and if I go and stop it right here and go frame by frame, there is increasing velocity

here and then there is decrease in velocity and that's indicated there is a translation.

You can look on it from the top and I think I can move it here.

There is one arrow here that was not traced but it's okay.

Now I can do also.

Here you'll see the translation which is here.

You see?

Yeah.

So there is a translation.

You see there is a lot of rotation here and there is a sunset but it's not 100% translation

but that's very good.

That's his argument, he just made his argument here.

And there is an arrow but the arrow happened after the impact so that's not the problem.

So in this case of Kleister, the coach was interested in the speed of the ball, the

speed of the rocket as you see here.

So in this case of Kleister, the coach was interested in the speed of the ball, the

speed of the rocket as you see here and the right wrist.

And in order to see it immediately, I go to the renderer, in this case it's Kleister.

And here you'll see the wrist angle.

If I want to add in this case the speed of the ball, use the speed of the ball.

If I want to look on the right, if the speed of the rocket, use the speed of the rocket.

I'll take the rotation out and look on it from every angle.

And if I want to see them all three, here are all the three together.

So all the information that the coach wants to see will show here and at the same time

will show the outlet in a hair movement, in this case it's Kleister.

Now if we want to look on different events, if I just want to look on this event, here's

this event.

And this event was actually the start activity, if I go to the start activity, that's it.

The other event is the ball impact, here it is.

The other one is the end of the activity, here is the end of the activity.

Now I'll take the, all the frame here, so it will be shown again.

If I want to go to the start of the activity, I can show every event at different time.

Here it is, if I go to here, this is the second event and this is the third event, the end

of the activity.

So that's the beginning of the activity, the impact and the end of the activity.

And you see here the vertical bar, show you exactly where it happened on the parameters

of interest.

Let's say a position here, the position here, event here and event here.

So now I'll see and process it, now I'll say more images because I created new events.

So basically you're creating a strobing of this activity and you see it's a little bit

blur here, but this is the activity that we selected in this case.

And also you can see the stick figures in the background of this particular motion.

So the wizard gives the coach the ability quickly to define parameters and show it right

away on the screen in any form that you want.

So this is Kleister's in her backhand.

I can put the frame in store here.

I can rotate it in 3D, look on it from any angle.

I can look on the different parameters again here, like the speed of the ball, here's the

speed of the ball.

You see here, if I want the speed of the rocket, here's the speed of the rocket.

If I want to look on the right wrist angle, here's the right wrist angle, and if I want

all of them together, here are the all together.

So that's incredible, you see here, if I want the speed of the rocket, here's the speed

of the rocket.

If I want to look on the right wrist angle, here's the right wrist angle, and if I want

all of them together, here are the all together.

So that's incredible level of information that can be drawn really quick from the video

analysis.

This is the most advanced program in the world that can do all this thing, where it

combines strobing, videos, stick figures, kinematic information, and results.

On the side, okay, so here she is, and would be interesting if she's doing the same thing.

So if we look on it from the top, and we'll move it a little bit.

So it's very similar thing here.

There is a lot of rotation, and yield translation, a little bit less than Agassi, or the swing,

when you see the whole thing, how it goes here.

And then if we reset it to the side, and we can turn it around, that's very nice shots

here.

And make it a little bit bigger.

Very nice, okay.

So we got that.

Now we do file.

So I'm loading now at the renderer.

I'll open, in this case, I'll take Federer's serve, and I'll transfer it into a skeletal

view.

And then I'll add to that, Kleister, Kleister, serve, so I'll do file.

Open, in this case, I'll take Kleister's serve, which is here.

So here you'll see the best men, and the best women.

Everything very, very similar.

And if I put the skeleton, here's a bigger, I want to put the properties here.

If I put it in a skeleton, it will not be as good view, now if I put the other one,

this is Kleister, and I want to see, that's Kleister.

I'll put this, yeah, it's giving me the only the current one.

But that's still good, and it looks like they're into the same school serving.

You'll see only the points, the joint centers, for one.

And then you can look on it from different angle.

If I actually go to the option and close the constrain to the novertical, I can look on

it from up or down.

And also I can put different traces.

So if I go to the points and I want to trace, for example, different segments like the ball,

the tip of the rocket, the handle, I can see all this thing at the same time, and it can

make a comparison here.

Yeah, very, very similar serve.

See, but the ball's a very, very strong serve.

See, she's taking her legs a little bit sooner, but very, very similar, almost like if they

had the same coach.

And if we want to see against certain points, we'll go points and we'll go same kind of

points.

Go to central gravity, the ball, the tip of the rocket, yeah, that's the tip of the

rocket.

The rocket's all around on your back.

That we have to go to the kinematic, but slow, you mean, you see the, yeah, that's why it

looked bluish.

And then the more, the whiter it gets, the faster it is.

So if you look on the, that's the tip of the rocket.

So it's the fastest here, because it's the whitest, you see, it's going boom.

And of course, the ball getting there, you can look on it from all angles, upside down

everywhere you want, move it here.

And reset it to where it was.

We have Fedor here, so we'll select Fedor backhand in this case.

We can do a quick renderer, so here you see the motion, there is also a rotation here,

which I'll take the rotation out, so you see the whole segment of this particular thing.

We can rotate him, so while he's doing it, we see it from every angle, that's all three-dimensional.

And we can do different kind of tracing, for example, I can show the frame history, so

it shows the whole motion while he's doing it.

And here you'll see also different curves, these are the parameters that a particular

coach, in this case Mr. Braden, are interested in, but different coaches might be interested

in different things.

I can have also all the frames, so it shows all the frames going and going right through

the frames.

Another perspective, and of course it's all in three-dimensional, so I can move it.

And also we'll add some points here.

So again, the ball, the central gravity, the tip of the rocket, and the right hand.

And then you see Fedor here.

Translation here, very, very important.

And then rotation again.

So there is an area where there is deceleration of the rocket, basically.

Of the hand of the rocket.

That's what's creating the whip.

We're going from all translation here, very, very important.

And then rotation again.

So there is an area where there is deceleration of the rocket, basically.

Of the hand of the rocket.

That's what's creating the whip.

I'm going from all the angles.

I'm going from the top.

OK, what I wanted to show is that I'll go now to the display and I'll show I'll continue

with the recording.

That's good.

Do you want to continue?

Yeah, yeah.

Just to show it.

And if I go to the display and just look on the velocity of the ball, which is very critical.

Let's say 140 miles an hour, 130 miles an hour, however, I want to show how the ball

of the velocity is changed direction, it's changed velocity so fast.

So if I take, for example, Fedor serve, which was 140 miles an hour, and I just do linear

velocity of the ball in 3D.

And I'll graph it.

So this is the velocity of the ball, and I'll put the stick figure here.

So now when I'm going all the way to the hit, to the impact, which is to happen here, look

what happened to the velocity of the ball.

It reached peak velocity, but it dropped velocity very, very quick.

So from 140 miles to 120 miles, it dropped it in only a few seconds, less than a second.

So when people say it's 140 miles an hour, by the time it reached the ground, it's maybe

only 70 miles an hour.

So that's very important to, now we have the whole process of the serve.

And if we go frame by frame back to the impact, which was here, you see where the impact here.

And obviously that's happened when the hand is in maximum velocity, which makes sense.

And the tip of the rocket, maximum velocity, so the hand, the tip of the rocket, and of

course the ball going much faster even.

In fact, if we want to measure it, we can go to the tools, label.

We have to look on this particular one in a second, so we'll go to tools, label, add

and I'll add a value on the Y. And if I want to know what was the velocity of the ball

at maximum velocity, it was 3,007 inches per second, which is about 140 miles an hour.

We can do the conversion, in this case we have it in inch per second.

If we look on the hand, the hand was 1,439 inches per second.

If we look on the, I'm sorry, that was the tip of the rocket.

If we look on the hand now, the red is the hand.

It's 527 inches per second.

And if we want to look on the, well, we saw already the ball, which is here 3,107.

Now if I'm bringing it back, then, okay, we'll get out of here, we'll bring the stick figure

back.

Now I want to add the video.

We also have the video with all the data, so they're all synchronized together to show

you the whole process of the analytical process, to find out what it's doing, see the video,

see the stick figures, and see the results, in this case, are 3 parameters, but we can

go to any body segment to show the same thing, so I can go frame by frame.

This invaluable information for the coach to understand what's really going on in the

process of this particular performance by Federal, Warner, or maybe number one tennis

player in the world in this time.

And again, we'll take points, and we'll make it few more segments, so the central gravity,

the ball, the tip of the rocket, and the right hand.

Okay, we'll look on it for more size.

This was by the way, 140 miles an hour, we calculated.

But one more thing that I want to show here in a second, make it a little bit bigger,

make it up, you can look on it from the top, and the thing is that we didn't have

come around the top, but this is what 3D will do for you.

And interesting enough, if I look here, now turn him around, is that if I stop the rocket

now, you see that here, he's going down, and the rotation continues, there is no translation.

It continues all the way as compared to the back hand and the forehand.

So what Vic said is absolutely correct.