[PD] More Gem help for Blockhead-Me please?

B. Bogart ben at ekran.org
Fri Oct 31 04:59:19 CET 2003

Look at the help in CVS

I think its on Chris's page at: (may or may not be up to date)


As for pix_data I think you can get at all pix_ data.

To get the gemwin buffer into pix_ land try pix_snap.


----- Original Message -----
From: "Wade McDaniel" <pdman at aproximation.org>
To: <pd-list at iem.kug.ac.at>
Sent: Thursday, October 30, 2003 3:42 PM
Subject: [PD] More Gem help for Blockhead-Me please?

> Hello pd-listers~
> I was hoping someone could tell me if pix_data can read from a openGl
chain (e.g. from the rasterization frame) or if it only works with objects
like pix_video?
> Im writing a patch that will eventually read from a pix_video object and
map that onto a cube that fills the screen, and read pixeldata from that,
but as I dont have my camera now, I want to test my patch by moving a cube
around in 3-space and testing the fields of pixels the patch is looking at
in the window. I cant get any data from pix_data with a white cube sitting
right in the middle of the window.
> I tried x:400 y:300 (screen dimentions are 800x600) and x:0.5 y:0.5, both
> I have the chain hooked up as follows:
> [gemhead]
> [translateXYZ]
> [pix_data]
> [cube]
> and I tried:
> [gemhead]
> [translateXYZ]
>   |       \
> [cube]   [pix_data]
> both failed...
> Also, B. Bogart said that I can change the bounding box of gem by using
the [view< message. Whats the syntax for that message? Thanks for the help B
and everyone!
> -wadeislost
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