Externalising the time-base of the particle patch and the movie and
controlling with a stopwatch is effective.
Controlling the behaviour of the key press / release is more
interesting. You can set up 'switches', non-switching toggles (the
default behaviour of the keyboard patch), switching toggles, flip-
flops (I may be making up these terms now) and other combos using
logic, conditionals, counters and the like. There's one in the demo
patch which is great that came from momo the monster http://flow.la-
va.org/?cat=19 - the "1 - 0 - 1 toggle"! On the particle patch, this
produces a fade out and in on a key press. Use a math patch with this
and you move back and forth through a movies. Nice.
Here's the demo patch that shows off a couple of approaches to
keyboard control --> stopwatch --> particles. The principle is the
same for controlling movies and any patch with a time-base.
*******************************
Ian Grant
Lecturer in Digital Art
Faculty of the Arts
Thames Valley University
Ealing, UK
W5 5DX
<email@hidden>
*******************************
On 22 Feb 2007, at 03:20, Scott Beatson wrote:
Ok, I'm fairly new to this, and I very well might be missing
something, so please bare with me.
One of the things that I would like to do is have a particle system
generating particles on a keyboard input. (i.e. I press the "s" key
and the particles start being generated.) I can only seem to turn
render layer of the particles on or off, but they continue to be
generated when not being rendered. Is there anything I can do?
Similarly, I want to have a non-looping movie start playing on a
sprite on a keyboard input. Again, I can only seem to turn the
rendering on or off, but the movie keeps playing. I've tried to use
an interpolation patch and external time control, but the
composition continued to become increasingly complex and I never
really got anywhere.
I'm ultimately wanting to create a purely quartz composer
composition for a presentation for a fundraiser for my high school,
so I'm not integrating this into an application.
Thanks for any suggestions you have.
-Scott
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