Compositing CGI with Bigger Node Trees - Nuke 101: Professional Compositing and Visual Effects - page 101

3. From the Transform toolbox, attach a Crop node after Read1.
4. Grab the top-right corner of the Crop controls and drag it down and to the left to
frame the Lemming.
5. Close all Properties panels by clicking the Empty Properties Bin button, to hide
the controls ( FIGURE 3.7 ) .
Figure 3.7. The bounding box.
Thedottedlinethatformedwhereyouplacedthetop-rightcorneristhebounding
box. The numbers at the top right in Figure 3.7 are the top right location of the
bounding box, in pixels on the X and Y axes. The resolution of the image itself
didn'tchange,butpixelsoutsidetheboundingboxwillnotbeconsideredforpro-
cessing.
Going frame byframe and animating the crop bychanging the on-screen controls
andaddingakeyframe oneveryframetakesalongtime andisn'tveryprecise, so
there's a tool to automate the process: the CurveTool node.
6. InsertaCurveToolbetweenRead1andCrop1byclickingRead1andthenclicking
CurveTool in the Image toolbox ( FIGURE 3.8 ).