Hello Jason,
when I am going to analyse a Quartz Composition file first of all I
try to find the renderer which is responsible for the output I am
interested in. In the case of the "Scanner.qtz" you mentioned it is
the Billboard-patch on the right side. Then I am going to examine the
inputs of that patch and find some interesting looking once by
howering over the input knobs of the patch to wait for the tooltip of
each to see the current input value (works only if the viewer window
is running). In the Billboard-case, obviously this is the "image"
input. Here the image input looks like the final result on screen, so
the billboard patch itself can't be the magical part. I follow the
connection backwards where the image input comes from and find the
macro "Crop To Destination". Nothing interesting happens here (the
input image looks pretty much the same as the output image). Following
the next image input to the "CIMulitply": Nothing special here again.
The image source path comes to "Affine Clamp"-patch which has an image
input of a single pixel line. Now this is really interesting: The
"Affine Clamp"-patch can create a big image out of a single pixel
line. Now I try to play around with the parameters of that patch to
see how it affects the result on the screen to learn what those inputs
all about. And so on and so on.
Going backwards through the hierarchy of the QuartzComposer document
starting from a render patch is pretty much the same what
QuartzComposer doing anyways to see what it has to draw on screen.
Thats how I learned a lot of QuartzComposer.
best,
Achim Breidenbach
Boinx Software
On 05.04.2010, at 15:05, Jason Miller wrote:
Dear QC Experts,
I'm trying to learn from QC to create content to brand some podcasts
I hope to produce with podcast producer. (These are podcasts for
courses and research experiences at University.) I've used a bunch
of Google to find examples and tutorials to work through, and that
has gone reasonably well. I've lurked on this list for a while, and
much has gone straight over my head.
The examples that ship with OS X's Developer's Tools intrigue me,
and I was hoping that there is some document somewhere that explains
some or all of these examples. Is there anything 'out there'? For
example, I'd like to be able to decipher the 'Scanner.qtz' document.
There are also several QTZ files that I'd like to understand in the
Quartz Composer -> Examples -> Patches.
Are there other notable stores of example QTZ files out there that I
could learn from? At what point should I generate content in QC as
opposed to generating it with Keynote's functionality?
Thanks in advance for whatever pointers list members can share.
Jason
================================================================
Jason E. Miller, Ph.D.
Associate Professor of Mathematics
Truman State University
Kirksville, MO
http://pyrite.truman.edu/~millerj/
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Quartzcomposer-dev mailing list ([email protected]
)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quartzcomposer-dev/achim%40boinx.com
This email sent to [email protected]
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Quartzcomposer-dev mailing list ([email protected])
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quartzcomposer-dev/archive%40mail-archive.com
This email sent to [email protected]
