Apple Shake 4 Tutorials Manual do Utilizador descarregar pdf (Página 53)

Tutorial 2 Intermediate Skills 53

This tells Shake to calculate only the image information within the DOD boundaries.

The rest of the image is ignored, thereby reducing memory usage, I/O activity, and

processing time, both upstream and downstream in the node tree.

5 Click the Flipbook button in the Viewer shelf to create a preview of the image with the

DOD applied.

When you play back the preview (press the period key), you’ll see that the DOD crops

some of the animation as the clip plays. To fix this, make an adjustment to the border.

To adjust the SetDOD border:

1 Load the SetDOD1 node into the Parameters tab.

2 Change the border setting to these values: left = 240, right = 600, bottom = 65, and

top = 512.

This allows enough border space to include all the animation from the clip.

Note: You can further optimize rendering for each frame by animating the DOD

borders at different places along the duration of the clip. Don’t do this for the current

tutorial—it will cause problems later in the example—but keep it in mind for future

reference.

The SetDOD node will save you a small amount of render time for each frame. As the

number of elements in your composite increases, so does the potential render time.

Additional SetDOD nodes can dramatically optimize a complex composite.

Grouping Nodes

Next you’ll use Shake’s Groups commands to combine the mitosis, SetDOD1, and

Move2D1 nodes as one node in the tree. This will help you copy and manage these

elements in the script.

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Apple Shake 4 Tutorials Manual do Utilizador Página 53