Hi all,
Is it normal that I get always 1 on the fourth output after the
[unpack f f f f] from the second outlet of [pix_mean_color] ? I tried
with an [alpha], but nothing changed.
Here's the test file.
Thanks,
Anas Ghrab p.s. : OS X 10.5.8; Pd : 0.42.5-extended
On Wed, 15 Dec 2010, Anas Ghrab wrote:
Is it normal that I get always 1 on the fourth output after the [unpack f f f f] from the second outlet of [pix_mean_color] ? I tried with an [alpha], but nothing changed.
Bonjour,
[alpha] in itself doesn't modify a pix, it only activates the use of the alpha channel in a tex, and so, it's only relevant after using [pix_texture], and it doesn't do what you want to do.
What do you want the alpha channel to represent, in your pix ?
| Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, QC
Le mardi 14 décembre 2010 à 18:18 -0500, Mathieu Bouchard a écrit :
On Wed, 15 Dec 2010, Anas Ghrab wrote:
Is it normal that I get always 1 on the fourth output after the [unpack f f f f] from the second outlet of [pix_mean_color] ? I tried with an [alpha], but nothing changed.
Bonjour,
[alpha] in itself doesn't modify a pix, it only activates the use of the alpha channel in a tex,
No, it activate alpha blending in the fragment processor, so on a geo after resterization or/and a texture apply on this rasterized geo.
and so, it's only relevant after using [pix_texture],
Or without [pix_texture] (just a geo).
and it doesn't do what you want to do.
that true.
What do you want the alpha channel to represent, in your pix ?
Only the alpha ! Look at the 'data' folder in the gem example, there is a 'fractalAlpha.TIF', [pix_mean_color] return the average of the alpha in this pix.
Anas, put a [pix_rgba] after [pix_video]. ++
Jack
| Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, QC _______________________________________________ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
On Wed, 15 Dec 2010, Jack wrote:
Le mardi 14 décembre 2010 à 18:18 -0500, Mathieu Bouchard a écrit :
[alpha] in itself doesn't modify a pix, it only activates the use of the alpha channel in a tex,
No, it activate alpha blending in the fragment processor, so on a geo after resterization or/and a texture apply on this rasterized geo.
ah... désolé, tu as raison.
and so, it's only relevant after using [pix_texture],
Or without [pix_texture] (just a geo).
idem
| Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, QC
-
Anas Ghrab -
Jack -
Mathieu Bouchard