[PD] still struggling with basic understanding of Gem dataflow

[Hans-Christoph Steiner]

I think this is an appropriate place to discuss gem.  In the Help  
browser, check out:

examples -> Gem -> 04.video -> 04.videoRTX.pd

I had to do some trickery to get it working OK.  Check the archives  
for details, I remember some discussion about all the separators.

.hc

On Mar 24, 2009, at 3:35 PM, John Harrison wrote:

> Attached is a small example patch of how I just don't get  
> Gem...still...
>
> [pix_rtx] has a steady wave that normally flows from left to right.
>
> I would have thought that the attached patch shows me rotating the  
> image first, then applying [pix_rtx]. So it would stand to reason in  
> my mind I would see a rotated image with [pix_rtx] flowing from left  
> to right.
>
> But that isn't the result I see. The patch has [pix_rtx] flowing  
> from right to left now. It is as if [pix_rtx] is applied *before*  
> the rotation instead of *after* as I would have expected.
>
> Grasping at straws, I have tried [pix_separator] between just about  
> every object, but that makes no difference.
>
> What am I misunderstanding that makes the behavior of the patch make  
> sense? And...how would I get [pix_rtx] to flow from left to right on  
> a mirrored image?
>
> -John
>
> P.S. Are questions like this better on the Gem-dev list? That's a  
> developer list but at the same time I feel a bit awkward putting too  
> many Gem questions on a Pd list
>
> #N canvas 962 171 305 227 10;
> #X obj 29 -58 gemhead;
> #X obj 29 -35 pix_video;
> #X obj 29 44 pix_texture;
> #X obj 28 72 rectangle 4 3;
> #X obj 159 9 gemwin;
> #X msg 136 -34 create \, 1;
> #X msg 214 -33 destroy;
> #X obj 135 -57 loadbang;
> #X obj 29 17 pix_rtx;
> #X obj 29 -10 rotateXYZ 0 180 0;
> #X connect 0 0 1 0;
> #X connect 1 0 9 0;
> #X connect 2 0 3 0;
> #X connect 5 0 4 0;
> #X connect 6 0 4 0;
> #X connect 7 0 5 0;
> #X connect 8 0 2 0;
> #X connect 9 0 8 0;
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