Apple MA434Z/A User Manual - Page 272

mixer Other default choices are: • cut • dissolve • horizontalWipe • verticalWipe You can also add your own custom effects. For more information, refer to "Customizing the Transition Node" below. clipMode This option appears when mixer is set to Dissolve, allowing you to choose which image sets the DOD. channels This parameter appears when mixer is set to Dissolve, allowing you to choose which channels are dissolved. blur This parameter appears for horizontal and verticalWipe, and is used to soften the wiping edge. reverse This parameter appears for horizontal and verticalWipe, and is used to flip the direction, for example, from left to right to right to left. mixPercent This parameter, with accompanying graph, appears whenever the mixer parameter is set to anything other than "cut." mixPercent determines the timing for the mixing. For example, for dissolve, if mixPercent is at 20, the second image is 20 percent mixed in and the first image is 80 percent. You can tune a curve interactively in the interface to adjust timing. Customizing the Transition Node If you like, you can create custom mixers for use by the Transition node. To create your own custom mixers in a startup .h file, you must do two things: m Create a macro with two image inputs, i1 and i2, and a float parameter named mixPercent that typically has the default value of "HermiteV(x,1,[0,50,50]@0,[100,50,50]@100)". This gives you the animation curve that can then be tuned in the interface. You can also add other parameters. m Declare the function as a mixer for Transition with the nfxDefMixer command in a startup .h file. The first parameter is the name of the mixer as it appears in the list. The second entry is the call to the macro: nfxDefMixer("horizontalWipe","HWipe()"); 272 Chapter 8 Using the Time View