<!doctype html public "-//W3C//DTD W3 HTML//EN">
<html><head><style type="text/css"><!--
blockquote, dl, ul, ol, li { padding-top: 0 ; padding-bottom: 0 }
--></style><title>Re: [PD] GEM</title></head><body>
<blockquote type="cite" cite><font face="Arial"
size="-1">hi,</font></blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1">am i alone
in finding GEM really not intuitive?</font></blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1">it doesnt
really have a "dataflow" feeling to it.</font></blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1">For example
[cylinder] outputs an cylinder to graphics window,</font></blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1">but it isnt
connected to the [gemwin] block.</font></blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1">What if i
wanted to multiply the pixels of 2 different cylinders
and</font></blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1">then output
it to the graphics window? </font></blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1">Normally i
would think:</font></blockquote>
<blockquote type="cite" cite><font face="Arial"
size="-1"> [cylinder]
[cylinder]</font></blockquote>
<blockquote type="cite" cite><font face="Arial"
size="-1">
\ <span
></span> /</font></blockquote>
<blockquote type="cite" cite><font face="Arial"
size="-1"
>
[pix_multiply]</font></blockquote>
<blockquote type="cite" cite><font face="Arial"
size="-1"
> <span
></span> |</font></blockquote>
<blockquote type="cite" cite><font face="Arial"
size="-1"
>
[gemwin]</font></blockquote>
<blockquote type="cite" cite> </blockquote>
<div><br></div>
<div>The problem here is that you are trying to use the pix_ image and
video objects with an OpenGL 3D object. The pix_ prefix is the
clue that all the pix_ objects work together, maybe the 3D objects
should have been named 3D_cylinder or geo_cylinder but it's a little
late to do that now.</div>
<div><br></div>
<div>Also, what would you expect to happen when you multiply these two
objects? The cylinder object only sends a set of vertices as a
description of the cylinder to the video card, so what would
multiplying those vertices actually do? Make the cylinder
larger? If the cylinders were textured there is a way to
multiply the textures together using a shader, but GEM is not capable
of doing that just yet.</div>
<div><br></div>
<div>You could use pix_snap to grab the area of the output window with
a each cylinder then use pix_multiply on the captured areas. </div>
<div><br></div>
<blockquote type="cite" cite><font face="Arial" size="-1">maybe it
would be more fun if there was more a flow to it,
like</font></blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1">with pd
sound. dont shoot me down if im wrong, it's just an impression
:)</font></blockquote>
<div> </div>
<div>I think it might be more 'fun' once the tutorials are more
complete and integrated with the distributions. Until then you
might want to learn about OpenGL, 3D, video processing in general to
figure out why your patch doesn't work.</div>
<div><br></div>
<div>cgc</div>
</body>
</html>