There is no good way of doing this on Tiger other than to push the
image caching upstream and outside of qc.
.xX
On Sep 2, 2007, at 9:32 PM, Brendan Humphreys <[EMAIL PROTECTED]
> wrote:
Hi Folks,
I've designed a QC composition that uses an iterator patch to
iterate thru the contents of an RSS feed and process each RSS entry
(using a Javascript patch), and then render a cube for each entry,
with this processed data determining the content of an Image with
String for the front of each Cube, and various other cube inputs (x-
pos, colour etc).
The problem I'm suffering from is terrible performance. In each
frame many patches are executing unnecessarily, since the RSS
changes only rarely, and so all the decision logic / javascript
patches used to generate inputs to each cube will evaluate to the
same result.
Is there any way to prevent this unnecessary execution? What I
really need is some kind of "Latch" or cache patch that could be
wired to the "updated" output of the RSS patch, so that unless there
is new content, the cached content is provided to the cube inputs.
I found this old thread which describes the identical problem back
in 2005:
http://lists.apple.com/archives/quartzcomposer-dev/2005/May/msg00130.html
Unfortunately that thread didn't have a happy ending. I'm reposting
the problem in the hope that someone else might have devised a way
around this seemingly simple problem.
Thanks in advance for any help anyone can provide.
Cheers,
-Brendan
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