Cycling 74 » Topic: possible to render a opengl scene offsceen to send it via syphon ? http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/feed Tue, 18 Jun 2013 23:42:24 +0000 http://bbpress.org/?v=2.2.4 http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-60604 <![CDATA[possible to render a opengl scene offsceen to send it via syphon ?]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-60604 Sat, 10 Dec 2011 18:02:57 +0000 timtom Hello Jitter community,

I am trying to render a opengl scene with 2 videoplanes and one gridshape to a texture without displaying the scene to a window.
The question is: is it possible to render a scene offline ?

Later I want to pipe this texture with the jit.syphonserver to an other max application.

Here is a smal examplepatch.
Setting the visible to 1, everything is working fine.
If i set it to 0, my texture (dst) is empty :-(

Switching to max6 is not an option, because the syphon externals does not working …

My workaround is placing the jit.window offscreen with the position message, which is not very elegant …

Best,
TT

– Pasted Max Patch, click to expand. –
]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218098 <![CDATA[Re: possible to render a opengl scene offsceen to send it via syphon ?]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218098 Mon, 12 Dec 2011 13:43:04 +0000 dtr i have the same issue: http://cycling74.com/forums/topic.php?id=33397

but i can live with hiding the window somewhere. jit.gl.node in Max6 might be a solution though. haven’t tried yet.

]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218099 <![CDATA[Re: possible to render a opengl scene offsceen to send it via syphon ?]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218099 Mon, 12 Dec 2011 14:03:28 +0000 timtom The simple question is:
Is it possible to get a texure from jit.gl.render object without a visible [jit.window] or jit.pwindow ?
Perhaps someone found a solution ….
Thanks in advance !
TT

]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218100 <![CDATA[Re: possible to render a opengl scene offsceen to send it via syphon ?]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218100 Mon, 12 Dec 2011 18:13:32 +0000 Andrew Benson I believe Vade is pretty close to having a fix for syphon in Max 6, if it’s not already done. The easiest way will be to use jit.gl.node @capture 1. You can make the render context any size if you use @adapt 0 on jit.gl.node.

In Max 5, your best bet is to use jit.gl.sketch “drawobject” commands.

]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218101 <![CDATA[Re: possible to render a opengl scene offsceen to send it via syphon ?]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218101 Tue, 13 Dec 2011 11:50:50 +0000 timtom Thanks a lot for the answer, Andrew !
I will go the jit.gl.sketch “drawobject” route.

I have to finsh my project soon, so i can not wait till
syphon is ready for max6.
TT

]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218102 <![CDATA[Re: possible to render a opengl scene offsceen to send it via syphon ?]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218102 Sat, 17 Dec 2011 16:15:46 +0000 vade Hi, sorry I missed this thread. I am away from home and don’t have great internet.

Here is a test version that has some fixes for @capture to work with node and other capture mechanisms. We had a bug with our OpenGL implementation which was assuming some state was never changed. We never had an issue anywhere else, except for with Jitter, which in some rare cases *does* change this state, and we never reset ours back to the assumed default. Programming is fun. This should fix many odd issues with the Jitter implementations.

Try this out, let me know if it works for you, and stay tuned for a legit release. Thanks,

http://dl.dropbox.com/u/42612525/jit.gl.syphon.zip

Note this also works with the implicit contexts in Max 6 (no need to specify a context name), which will make life much nicer for folks starting with GL.

Many thanks to JKC and Rob Ramirez for general Max API help.

]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218103 <![CDATA[Re: possible to render a opengl scene offsceen to send it via syphon ?]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218103 Wed, 01 Feb 2012 02:03:06 +0000 tohm Hi,
I’m not sure if this is the same thing, but I am missing how I can get my gl sphere to show up in the syphon window (I’m going into VPT and/or Madmapper). The capture 1 does get the background color changes, but not the object.

I am sure this is something I am totally blanking on, really new to gl and syphon… but here is the lighting patch I was trying to test this with.

thanks!

– Pasted Max Patch, click to expand. –
]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218104 <![CDATA[Re: possible to render a opengl scene offsceen to send it via syphon ?]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218104 Wed, 01 Feb 2012 07:08:13 +0000 vade This patch has a few issues.

If you are going to capture a node to a texture, ensure the node is correctly drawing things. That node had nothing hooked up to it at all.

Secondly, since you texture is your ‘scenes’ destination, you probably want to ensure that you see what you are sending to syphon, via drawing your texture to a video plane.

Finally, I really highly recommend using the @layer or @automatic 0 feature to manually control order of operations with GL. Its gives you more explicit control as to render order, and you can ensure things happen when and how you need them.

See if you can find some ‘render to texture’ examples, and get them working in a cleaned up/simplified version of your patch.

]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218105 <![CDATA[Re: possible to render a opengl scene offsceen to send it via syphon ?]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218105 Wed, 01 Feb 2012 14:39:25 +0000 goto10 Hey- had this issue in a recent project- I found the easiest way is to send jit.gl.render a “to_texture texturex” message with every frame. Let me know if this solution is missing anything.

Rock and roll,

: j

– Pasted Max Patch, click to expand. –
]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218106 <![CDATA[Re: possible to render a opengl scene offsceen to send it via syphon ?]]> http://cycling74.com/forums/topic/possible-to-render-a-opengl-scene-offsceen-to-send-it-via-syphon/#post-218106 Thu, 02 Feb 2012 01:25:30 +0000 tohm Thank you ! Thank you! Thank you!

That got it! I am experimenting with projection mapping for the first time and wanted to make a cube with some lighting and Jitter goodness.

@ vade… I am sure you have heard it a billion times, but thank you for all of your contributions, both to the forum and to the craft in general.

@ goto10 this is exactly what I needed, I had never seen the to_texure trick before, thanks!

here is where I am going to start off, with vades rules to follow :)

– Pasted Max Patch, click to expand. –
]]>