Graphics Programs Reference
In-Depth Information
name of this node, then the name of your property, and then the Input field you
need.
11. In Rectangle1's Properties panel, choose Edit Expression from the Area prop-
erty's Animation menu.
12. In the first line, for the X property, replace the digit 5 with NoOp1.actionSafe.w .
13. For the Y property, replace the digit 5 with NoOp1.actionSafe.h .
14. For the R property, replace the digit 5 with NoOp1.actionSafe.w .
15. Finally,fortheTproperty,replacethedigit5with NoOp1.actionSafe.h ( FIGURE
12.15 ) .
Figure 12.15. Changing the expressions to make use of the new User Knob.
16. Click OK.
Your new User Knob is now part of an expression and it acquires functionality.
17. Go ahead and play with your ActionSafe fields. You can bring it back to being a
slider or leave it as two Input fields. The expression will not break. You can see
the box on-screen change size horizontally and vertically. When you're finished,
go back to a value of 5 and a single slider.
Right. Now that you have this, you should make a safety area for titles. I will
quickly guide you through repeating most of what you already did for the action
safe area:
18. Select Rectangle1, Crop1, and EdgeDetectWrapper1. Copy them with Ctrl/Cmd-
C.
19. With nothing selected, paste what you've copied using Ctrl/Cmd-V.
20. Click EdgeDetectWrapper2 and press M to create a Merge node. Connect
Merge1's B input to EdgeDetectWrapper1 ( FIGURE 12.16 ).
 
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