What's the purpose of ramp0?

Question

In the description of ramp: I read the following "see ramp0 for a ramp that doesn't stick at 1". In the description of ramp0 I read "Once it reaches 1, it stays at 1". Practically it stays at 1 - but how does that differ from ramp:?

Also I really like the idea of a ramp that goes back to 0 once it reached 1 for expressions in trigger fields where you want the Sound to be triggered initially but retriggered by using !Reset using an expression like "1 - !Reset". If ramp0 would work as expected I could use "1 - (!Reset ramp0: 1 ms)" so it gets retriggered when I change Reset from 0 to any positive value. In the expression "1 - !Reset" the retriggering happens when !Reset becomes a 1 and a 0 again. That may sound like niggling but if you want to use a TriggeredSoundToGlobalController to Reset you really need this - or is there a better (and easier) way to accomplish that? Maybe I'm thinking too complicated here? "!Reset initialValue: 1" doesn't seem to work in the trigger field of a MemoryWriter BTW

Thanks!

Answer 1

ramp0:reset: rests at 0, linearly increases from 0 to 1 over the given duration when triggered, and stays at 1 until it gets reset.  So the form is:

<aTrigger> ramp0: <aDuration> s reset: <anotherTrigger>

Comments

I see, so I could use "1 - (!Reset ramp0: 10 ms reset: (!Reset turnOnAfter: 10 ms for: 1 ms))"? Pretty long expression for what I'm after but ok! Thanks!

Still I don't get the difference to ramp:... Besides the reset it's the very same thing, right?

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Also ramp starts at 1, whereas ramp0 starts at 0.

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not for me: If I use "1 ramp: 1 s" in a constant and use Info->Full Waveform for 1 s I get the very same waveform as when I use "1 ramp0: 1 s"... ?

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Yes, because once ramp or ramp0 is triggered it goes to zero and starts climbing.  You have them triggered by a constant 1.  Try instead comparing them with an EventValue as the receiver, for example,
!Gate ramp: 1 s and
!Gate ramp0: 1 s

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Oh, now it's clear! Thanks!

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Here's an expression that makes it return to 0:

!Gate ramp0: !Dur s reset: ((!Gate ramp: !Dur s) eq: 1)

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Thanks for ramp00 - Excellent addition to the already axcellent capyTalk language

Answer 2

If you want an expression that starts out true (1) and that will return to 1 when you press a reset button, this should do the trick:

!Reset + (!localTime eq: 0)

Here's a TriggeredSoundToGlobalController that demonstrates how it can start at the ResetValue, then you can move the fader, and when you press Reset, it jumps back to its ResetValue.

Comments

Nice one! I knew there would be a better way to do it! Thanks!