RotoPaint - Nuke 101: Professional Compositing and Visual Effects - page 263

Watch your curve move five frames forward. What happened here is you asked
to move all X values by the current X value plus five. So the whole curve moved
five frames forward.
Let's try another function.
13. Select your curve again, right-click (Ctrl-click), and choose Edit/Move again.
14. This time enter x/2 in the X field and press Return/Enter.
Watch your curve shrink. This is because you asked all X values to be half their
current value. Because X is time, your animation will now be twice as fast.
These examples and the other features in the contextual menu enable you to ma-
nipulate your curve in many ways.
15. If you want to save this project, do so. Otherwise, press Ctrl/Cmd-W to close this
project and create another one. IfNuke quits altogether forsome reason, just start
it again.
This concludes the introduction to both the Curve Editor and the RotoPaint node.
That's enough playtime! Let's move on to practical uses.
Painting in Practice
I would like you to start practicing with a simple and common example: Painting to re-
move things you don't want in the image. Let's load some footage to practice on.
1. Bring in KnifeCU.####.png from the chapter06 folder with a Read node.
2. Click the newly imported Read node, and then press Alt/Option-F to view it in
Framecycler or simply view it in the Viewer and click Play ( FIGURE 6.26 ) .
Figure 6.26. The wire holding the knife in place is visible and needs to be re-
moved.