Graphics Programs Reference
In-Depth Information
If you don't want this tab to be called User, you can click to select this line and
then click the Edit button and rename it in the panel.
8. Click the Done button in the User Knobs panel ( FIGURE 12.13 ) .
Figure 12.13. A new knob appears in the NoOp node's Properties panel.
You have just created a tab called User. Inside it you have a knob called Ac-
tionSafe. (I don't call it a property because it doesn't do anything yet. If you play
with the slider, nothing happens, because this is just a knob.)
9. Experiment with the ActionSafe knob. When you're finished, leave it on 5.
Remember,ifyoutieittosomethinginsomeway,itthenacquiresfunctionality.I
already explained what this knob is to be used for: as the Percentage property for
Rectangle1. Let's connect this up.
First you expose the two separate parts of the ActionSafe knob.
10. Click the 2 icon—the individual channel's button, to the right of the slider you
just created.
YounowhavetwoInputfieldsinsteadoftheslider( FIGURE 12.14 ) .Notethatthe
first Input field is called W and the second H.
Figure 12.14. Your Width/Height Knob's two Input fields exposed.
You will replace the percentage in Rectangle1's Area property's expression with
a link to this knob. To call up this property from another node, you first call the
 
 
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