Alex McCall

So I'm pretty new to jitter and even more to OpenGL - I found a patch online I wanted to try to both reverse engineer and expand upon to get a better understanding and make a useful tool for visual generation which I have had partial success with but am now stumped and would appreciate some outside input. I've read tutorial 31 on multiple image destinations but could not sucessfully put it into practice in the patch.

Basically I'm after the black + white image like what appears in the patchers pwindow (named static2) to also appear (synced) in the jit.window (named static) so effectively the pwindow becomes a monitor for whoever is using the effect and the jitwindow is the main window the audience would see on an external screen.

Ideally I'd like to send the black + white image to the jitwindow as at the moment my work around is basically rendering using the same values twice which is surely CPU hungry and not the easiest solution compared to doing it once then sending it, also unlike the pwindow the jitwindows render lines aren't white - they are kinda bluey green which I'd like to remedy if possible.

Once I've got the same B+W image coming out both screens I plan to change the colours of the lines with jit objects reacting to an audio input (fairly confident with this part) but I think I may need to use a matrix for this to work?

Any suggestions, input or advice on this iwould be appreciated, patcher is below:

Basically I'm after the black + white image like what appears in the patchers pwindow (named static2) to also appear (synced) in the jit.window (named static) so effectively the pwindow becomes a monitor for whoever is using the effect and the jitwindow is the main window the audience would see on an external screen. 

Ideally I'd like to send the black + white image to the jitwindow as at the moment my work around is basically rendering using the same values twice which is surely CPU hungry and not the easiest solution compared to doing it once then sending it, also unlike the pwindow the jitwindows render lines aren't white - they are kinda bluey green which I'd like to remedy if possible. 

Once I've got the same B+W image coming out both screens I plan to change the colours of the lines with jit objects reacting to an audio input (fairly confident with this part) but I think I may need to use a matrix for this to work? 

Any suggestions, input or advice on this iwould be appreciated, patcher is below:


open-gl-and-jitter-pwindow-jitwindow-display-and-destination-issues

Not behind the computer but I'd avoid using jit.pwindow as it runs on the cpu.

If im correct jit.window has a @shared attribute.

This should allow one render context to be shared on two jit.window objects.

You can define the starting positions of each window with the @position attribute.

There was also a few posts lately with how to set up a open gl preview context.

Not behind the computer but I'd avoid using jit.pwindow as it runs on the cpu.
Try to keep it all in open gl.
If im correct jit.window has a @shared attribute.
This should allow one render context to be shared on two jit.window objects.
You can define the starting positions of each window with the @position attribute.
There was also a few posts lately with how to set up a open gl preview context.


jit.pwindow does not run on the CPU as long as it's the drawing destination for a gl context.

alex, check out this wiki article about creating a opengl preview window:

https://cycling74.com/wiki/index.php?title=OpenGL_Preview_Window

alex, check out this wiki article about creating a opengl preview window:
https://cycling74.com/wiki/index.php?title=OpenGL_Preview_Window


You can also partition different sources into a single window.

Here is an example of several shaders in one window with mouse control to dynamically select the view. Quite useful if you have multiple effect stages that you want to preview prior to output. The shaders I included are all ported from shadertoy with a few random changes and no apologies. ymmv

You can also partition different sources into a single window. 

Here is an example of several shaders in one window with mouse control to dynamically select the view.   Quite useful if you have multiple effect stages that you want to preview prior to output.   The shaders I included are all ported from shadertoy with a few random changes and no apologies.   ymmv

Hi guys, thanks for all the input. I had a go at using the shared attribute but so far have only managed to get the pwindow using/sharing the image from the jitwindow whereas I was looking to get it the other way round (pwindow as the source and jitwindow as the destination as the render lines in the jit window aren't black and white like in the pwindow).

If anyone can shine some light on how I might get my patch to do this I'd really appreciate it. As I said in the first post- I'm a noob with OpenGL so apologies if the answer is simple/already there but I just can't work out how to get this result working in my patch for the life of me...

Hi guys, thanks for all the input. I had a go at using the shared attribute but so far have only managed to get the pwindow using/sharing the image from the jitwindow whereas I was looking to get it the other way round (pwindow as the source and jitwindow as the destination as the render lines in the jit window aren't black and white like in the pwindow).  

If anyone can shine some light on how I might get my patch to do this I'd really appreciate it. As I said in the first post- I'm a noob with OpenGL so apologies if the answer is simple/already there but I just can't work out how to get this result working in my patch for the life of me...


if you've set @shared 1 on both your jit.window and jit.pwindow, you should be able to share textures between them in any direction. in fact, the wiki article posted demonstrates doing exactly that in the second section.

post you patch if something isn't working.

So in the original patch (posted up top) the preview window is black and white whilst the jitwindow is black and greeny blue. Having played around and added the jit.node and @shared 1 attributes to the patch I can still only get 2 screens displaying the black and greeny blue version though I actually desire 2 in black and white. Also I checked the dest rectangle and src rect in the windows inspectors as I assumed this would control which way round the relationship was computed - this could be incorrect.

Here is my latest attempt at this which is currently sharing the wrong screen: 

So in the original patch (posted up top) the preview window is black and white whilst the jitwindow is black and greeny blue. Having played around and added the jit.node and @shared 1 attributes to the patch I can still only get 2 screens displaying the black and greeny blue version though I actually desire 2 in black and white. Also I checked the dest rectangle and src rect in the windows inspectors as I assumed this would control which way round the relationship was computed - this could be incorrect. 

Here is my latest attempt at this which is currently sharing the wrong screen: 


Open GL and Jitter - pwindow / jitwindow display and destination issues