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Re: Local time base



Could someone please explain how the Local time base works? Parent and External are obvious, but I can't figure out Local... Is it something like that it starts from 0 the first time it is enabled? I couldn't find it in the documentation.

Timebases are an advanced feature not in the doc yet - gotta write a technote on this... anyway, some patches depends on the "time" like LFO, Interpolation... and some don't, like Mouse or Sprite.
To know which ones depends on the time, control-click on them and in the contextual menu, you will have a Timebase submenu.


This timebase submenu defines the timebase the patch uses to compute the time it uses:
- Parent: the time is simply the same as its parent macro patch (default)
- Local: the time goes as fast as the parent time, but is reset to 0 every time the patch starts being used by the composition
- External: adds a new "Patch Time" input to the patch where the time can be manually specified


To test the local timebase, connect an interpolation (with timebase set to local) to the X input of a Sprite and also connect the Enable input of the Sprite to the button output of Mouse. Observe how each time the mouse button is down, the animation restarts at 0.

The fact you can customize timebases is pretty useful to build advanced timing systems inside compositions. Most of the time, you will use Parent or External in combination with the Stop Watch patch.

________________________________________________________

Pierre-Olivier Latour						email@hidden
Quartz Composer Architect				Graphic & Imaging Team

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References: 
 >Local time base (From: David Remahl <email@hidden>)



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