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Nuke 5 Essential Training was created and produced by Steve Wright. We are honored to host his material in the lynda.com Online Training Library®.
Nuke 5 Essential Training is designed for digital artists already familiar with compositing visual effects using programs like Adobe After Effects or Shake. This course provides a solid foundation in operating Nuke, using the core functions of keying, motion tracking, and color correcting, as well as Nuke’s key strength, 3D compositing. Tour the Nuke user interface, its unique color management system, and overviews of HDR images, masking, keyframe animation, and 2D and 3D motion blur. Exercise files accompany the course.
To animate Geometry in Nuke, there are three different tools you can use. Each geometric primitive has transformations built into the node. There's also the TransformGeo node and there's an Axis. Let's start by going up to the 3D tab, select the Geometry pop-up and we'll add a Sphere. A little more room for the 3D Viewer, switch the Viewer to 3D, click in the Viewer, f on the keyboard, zoom out, orbit around.
And here are the Transform parameters built into the Sphere node and, of course, we can edit any of these values and transform our Sphere. Okay, we'll undo that. We can also add a TransformGeo node, so we'll come up to the 3D tab, come to the Modify pop-up and select TransformGeo. You'll notice the TransformGeo Transform parameters are absolutely identical to the Sphere. In fact, they're an exact duplicate. So, we can animate the Sphere, also, using the TransformGeo node, as well. I'll reset that.
Now to edit an Axis, we'll click off to the side over here, come up to this 3D tab and select Axis. And again, we have the exact same set of Transform parameters. Okay, looking at the TransformGeo node, you'll see that it has an Axis input, so we can connect that to the Axis here and yet again, a third way of moving the Geometry, just like we did before, and we'll undo that. So, what's the difference? What's the point? All right. I'll show you.
I'll move the Viewer out of the way, because we don't need that. Double-click on the Sphere node. The Transform parameters in the Sphere node can only move that Sphere. The TransformGeo node can transform any Geometry, including an OBJ file or a cluster of Geometry that's been merged using the MergeGeo node. We'll double-click on the Axis here and the Axis can only move things that will accept an Axis input, such as the TransformGeo node.
But here's another thing the Axis node can do. I'm going to select the TransformGeo node, copy it, paste, paste, paste and paste. So, I now have a whole bunch of TransformGeo nodes. I can now hook the Axis input of all these TransformGeo nodes up to our Axis and now, if I animate anything in this Axis, all of the TransformGeo nodes will inherit it. The TransformGeo node also has this other interesting-looking input called look.
We'll be taking a look at look later, but what it does is it allows the Geometry to look at, or stare, at a target object. So, we'll see that in a minute. In the next video, we'll see how to use the MergeGeo, TransformGeo and Axis nodes to do a typical production problem.
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