You are right ! The next time that I will think more :) Thanx for your answer. ++
Jack
Le 4 avr. 08 à 20:38, cyrille henry a écrit :
Jack a écrit :
Yep, i know ;) But why use ressource when alpha channel = 0 ? Is there a good reason ?
lot's!
-you can use gemlist_info to get information from the curent transformation matrix in order to trigger other part of your patch
-with 1 gemhead, you can change the color many time and draw many primitive.
-you may need to simulate the use of this resources without displaing anything.
-the way it works now is logic.
-...
cyrille
++ Jack Le 4 avr. 08 à 18:43, chris clepper a écrit :
Just feed the 0..1 going into colorRGB right inlet into the gemhead.
On Fri, Apr 4, 2008 at 11:42 AM, Jack <jack@rybn.org mailto:jack@rybn.org> wrote:
Thanx Chris, it was what I thought. It would be interresting if the gemhead turn off when the alpha channel is 0 or not (and why) ? ++ Jack Le 4 avr. 08 à 18:32, chris clepper a écrit :No. In the alpha chain the geometry is still computed only the pixels are not drawn in the back buffer. Also, the gemhead has some overhead for setting up the various states andmatrices. Turning off the gemhead bypasses everything in the chain.
On Fri, Apr 4, 2008 at 11:20 AM, Jack <jack@rybn.org <mailto:jack@rybn.org>> wrote: Is it the same when the alpha canal of a [colorRGB] is 0than when [gemhead] has received the message 0 :
[gemhead] | [alpha] | [colorRGB 1 1 1 0] | [square] is it the same for the ressources take from the CPU/GPUthan :
[loadbang] | |0( | [gemhead] | [square] (The both methods erase the square). Thanx. ++ Jack _______________________________________________ GEM-dev mailing list GEM-dev@iem.at <mailto:GEM-dev@iem.at> http://lists.puredata.info/listinfo/gem-dev
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