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mocha has always been very popular as a tracking tool, but with the rising interest in stereo 3D conversion, its rotoscoping capabilities have become a favorite player in that pipeline and sales have soared. In this course, Steve Wright covers the basics of operating mocha, as well as advanced tracking and rotoscoping techniques. The course also covers the mocha/Nuke stereo 3D production pipeline in detail.
After drawing an X-Spline or a Bezier, you'll need to edit it for each keyframe. So here we'll see how to edit a spline. I'm going to use the Z key to zoom-in and the X key to pan over. By the way, I've included this little keyboard shortcut PDF file in your Lesson_01_Media folder. It's a list of the most common shortcuts we'll be using in these lessons and there is a longer list in the manual. I recommend you print this out and have a copy beside your keyboard. So we'll put this away.
First, let's take a look at how to select points. First we have to select the spline itself. Now we can click on a point and it'll light up. Once it's selected (let me get a little closer for you here) Once it's selected, you see that little plus sign (+). You can then move that point. I'll undo that. Holding down the Command or Ctrl key will allow you to pick several points. I'll click to the side to deselect. We can also draw a marquee around several points. If you selected more points than you want, you can deselect some by doing a Command+Click on the selected ones to turn them off.
You can also type Command+A or Ctrl+ A which will get you all the control points in the spline. However many points are selected, this little cursor will move them all together. I'll undo that. So the workflow can be -- we'll move the playhead to the next frame we want to draw on and select all of the points with a Ctrl+A or draw a marquee around them all, and then we can just drag them over to the new location. Then we can fine-tune their positions for each frame.
There are also some Transform Tools up here in the top menu bar that will help speed things along. Let's go to another frame and without selecting any points we can select the Translate Tool. Now this is intended to translate the entire spline. So we can then click-and-drag and move the spline over here. No points were selected. Here's the Rotate Tool. Wherever you click, move off to the side. You can then perform a rotation. I'll undo that. And here is the Scale Tool. Same drill-- wherever you click becomes the center of the operation.
I'll undo that. You'll notice that after using the tool we still have the tool's cursor. So if I select another tool I have that cursor and if I select another tool I have that cursor, but I don't have a Selection Tool. If I want the Selection Tool I'll have to go over here and select the Selection Tool. So when you select the tools off the top menu bar, the tool stays latched until you change it. However, if you use the keyboard shortcuts, they are transient; they only stay on as long as you hold down the key. For example, I'll hold down the Q key which gives me the Translate Tool and now I can translate it and as soon as I let go of the Q key the tool is gone.
If I hold down the W key, click, rotate, the minute I let go it goes back to the Selection Tool. I'll undo that, and of course the same thing for the Scale Tool. So you'll find the keyboard shortcuts not only faster, but more convenient. I want to call your attention to the cursor. Right now the cursor is for the Selection Tool. When I put it on a point, you see how the cursor becomes a plus sign (+) with arrowheads? However, when you use the Translate Tool the cursor becomes an X with little arrowheads.
So keep in mind the two different shapes of those cursors so you'll always know what tool you've got. By the way, there's a quick key of course if you look on your shortcuts. You can do a Command+F or Ctrl+F to get back to the Selection Tool without having to go up here and click on it in the menu bar. Now that we can edit our splines for keyframes we can take a look at the keyframing tools.
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