[PD] [Gem] delay line for geos?

chun lee leechun at leechun.freeserve.co.uk
Thu Dec 9 00:41:37 CET 2004

Hi Peter:

Thanks for the explanation and example.

Ya, I have only start to understand the way Gem/OpenGL works in terms of
gemlist and so on. I have also tried to draw trails or repeated motions with
[any] but did not get anywhere with it. Your example will be a good starting
point for me.

However, a Gem delay line object could be very interesting.

Thanks again


On 8/12/04 4:36 pm, "Peter Todd" <peter_todd82 at yahoo.co.uk> wrote:

>>> I would like to draw the trail of a geo in motion, how can I do this? I
>>> am
>>> thinking of delay the gemlist to the specified amount but having no luck
>>> in
>>> doing so.
>> I have wondered a bit about individual geos leaving trails, and delay line
>> type things, but I haven't reached much conclussion (or done much
>> experimentation).  You could use a table to store the previous frames
>> data, and have diminishing alpha for older elements, but again it would be
>> far from perfect.  Could be workable, though.  I might see what I can hack
>> together this afternoon, otherwise it won't be for a few days.  As far as
>> a generalised 'delay line' goes, I think this could turn out to be a good
>> approach.
> Here's a start. 

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