Original subtitles

Another very cool thing NUKE does for you is it allows you

to enter expressions into these boxes.

So if I had a very simple equation, like 1+1 for example,

like I'll type in here, and I hit Enter,

it's going to do the math for you and it's just going to give

you whatever the result of that equation is.

So that's not so useful in a skew box, so I'm going to set that back to 0,

and I'm going to show you where I use it the most.

I'm going to drop a new Transform into this comp,

and I'm going to connect it to our master image,

and we'll see that if I press 1 on the keyboard and view this master image,

it is a 1920x1280 image, and if I go and I look at this Transform,

we'll see that the manipulator for this transform,

this crosshairs here is a little off center,

and usually you have to go in and center these things all the time.

And so this is where the expressions become really helpful

because I can go right to the center attribute,

and I can say, well, this image is 1920,

and I want the center, so I'm going to divide by 2,

and this is a 1280, and I want this centered,

so I'm going to divide by 2,

and that's going to drop the crosshairs right into the center of the image.

And you can see the difference between where we started and where we ended here.

It's also important to note here what we're seeing is two

manipulators for two different Transform nodes,

and while I have both of these Transforms from my comp,

this Transform here and this Transform here selected

and available in the Properties menu,

it's showing me the manipulator for both of these nodes.

So, if I want to get rid of this manipulator,

for example, that's tied to the Transform1 down here,

I'll just close that box and that will go away,

and so now I'm only looking at the manipulator from this Transform,

which is this node here.

And if you get confused,

just go back and use those buttons that we showed you in an earlier clip,

click on the target,

and it'll center you right up on the node that's being manipulated.

Now if I want a very fine level of control over these numbers,

so if I want to move the center of this manipulator

now by let's say the ones place, I can put the cursor in the ones place,

and I can hold Ctrl on the keyboard, and I can hit up,

and I can hit down, and I can have very fine control over that manipulator.

If I want to move it in increments of 10,

I'll just put the cursor here and do the same thing,

I'm holding down Ctrl on the keyboard and pressing up and pressing down,

and that will increment it by units of 10.

Likewise, if I put it here, it will increment by units of 100.

You can see I have a very rough level of control.

NUKE also has an option called virtual sliders.

So if I select this attribute here and hold down Ctrl on the keyboard,

I can hold down the middle-mouse button and get a very fine

detail of control by just sliding the cursor from the left to

the right to determine the exact, exact number that I want.

And if you want a more course level of control,

hold down the Ctrl and the Shift button,

the numbers are moving in a much bigger range.

In the next clip, we're going to take a look at these buttons here,

and how they're used to animate each one of these values that you see.

This is going to be the beginning of setting up animation in NUKE,

and we're going to take a look at setting keyframes,

deleting keyframes,

and how we can share data in between each one of these attributes,

and even how we can share data in between each one of these nodes.