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In this lesson, we're going to learn how to reuse key frame data with the viewer.
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OK,
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so what I already have set up here for you is a Read
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node with this video of a bobble-head.
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And what I want to talk to you about in this lesson is how
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to create a rotoscope that has a lot of repetitive motion
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and save yourself some time.
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So if something is happening very similarly over and
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over in the shot that you're rotoing,
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you definitely want to reuse some of that key frame data and then
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minorly adjust it to fit any kind of subtle changes that may
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happen just to save yourself some time.
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So let's go ahead and get started with this process.
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So I'm going to open up the Roto node that we have down here.
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And this Roto node basically has just been drawn on
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top of the bobble-head's head here.
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And you can see that frame one through seven have already been keyed.
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So I just went ahead and saved us some time,
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because you're probably getting the hang of how to draw rotoscope by this point.
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So what I want to show you, though, is after frame seven,
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you can see that it just kind of sticks with the
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information it was left with on frame seven and the head
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continues to move without any keys.
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So all of this motion, however, is very similar.
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You can see if I'm on frame eight and then I come back to frame one,
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his head is in a very similar position.
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And the same goes for if I'm on frame nine and we go to frame two.
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His head-- not really looking at the roto shape-- just his head,
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doesn't really move too much.
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So we can reuse this shape very easily.
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So I'm going to go ahead and show you how to get started with this.
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So instead of copying from frame one to eight,
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which is kind of where that cycle begins again on frame eight.
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I'm going to show you from frame two to nine,
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simply because there's a bigger change that you can see in the movement
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of the rotoscope once that data has been applied.
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So that's just for the purpose of the tutorial,
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and if you're doing it on your own,
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you probably would just want to start right after that first cycle.
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So we'll go ahead, and come over here to frame two,
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which is where the data exists that we want to copy.
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So the first thing you want to do is, of course,
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move to the frame you want a copy from.
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Then we're going to come up here to our viewer, and select all of the points.
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So just drag a box around your whole rotoscope-- everything you
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want to move basically with this copy data.
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And then you're just going to right click on top of this, and go down to Copy.
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And you'll choose three curved spline key values.
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So this is going to give you the value of all of
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those little points or spline keys.
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So go ahead and click that.
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And now the data has been copied.
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Then,
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we'll come over here to frame nine because we know that
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our frame two corresponds to frame nine.
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And then we can right click again and just hit Paste
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and go down to three curves values.
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And you can see that now that roto shape snapped onto his head.
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Now we can go through here and adjust it a little bit if we need to.
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He might need a little more room on his chin.
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I can just click over here to deselect and maybe just grab those
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two points and pull them down just slightly,
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like that.
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But overall,
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he's very much in the same position that he was in that second frame.
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So let's go ahead and do this for our other frames as well.
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Now this is one of the drawbacks to this method.
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You have to do it frame by frame.
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So we'll start here on frame one.
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Select all of our data, right click, go to Copy spline key values,
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go over to our eight frame, right click and hit Paste three curve values.
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And then that's going to pop that back into place.
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And this one is a little bit more off than the first one,
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so we can kind of just move that down.
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But it's a lot better than trying to go in and redraw the shape from scratch.
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So you're going to have a lot better luck and also better
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point consistency by doing it in this way,
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because the more you change it over time,
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the more it's going to kind of differ from what that
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our original shape was that you drew.
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Cell this is definitely going to help,
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just by referencing that our original data.
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Then we'll go to-- let's see, frame three.
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And I'll go ahead and just select all my points.
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And you want to make sure that what you have over here is everything.
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So you see the ears haven't been selected.
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So I'm going to just shift to add those to the selection.
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Now those points are visible.
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Just draw that around there just to make sure you got everything.
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Then right click, go to Copy, spline key values,
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go to your next frame to copy to, right click,
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and hit Paste.
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And you can see that that just snaps into place.
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So now that we've done this a couple of times,
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I want to challenge you, in between lessons,
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to finish up this animation.
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Now I started on frame one and went to frame eight.
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So you can just remember that frame eight is the repeating frame,
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and then from there on, you would just basically continue repeating.
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Now I wouldn't necessarily say that by the time this cycle is in the
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third repetition to keep going back to frame one,
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because he's going to slow down over time.
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You can see he's already starting to slow down just a little bit.
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But it's a lot easier again just to adjust these key frames,
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rather than trying to come in here and draw it from scratch.
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So in this lesson,
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we learned how to copy and paste key frame data using our viewer,
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and in our next lesson we're going to learn the
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last step of drawing a rotoscope,
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which is going to be animating a complex rotoscoping mask really easily.
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So we've kind of gone through this, learned how to draw different things,
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learned how to re-use data,
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and now we're ready to start bringing this together to create a final
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piece that really shows off the power of rotoscoping.
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So stick around and we're going to learn how to do that in our next lesson.
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