Convert slitscan patch to GL

Feb 24, 2013 at 6:57am

Convert slitscan patch to GL

I’ve tried and tried, but I’m just unable to figure out how to convert the patch attached below to an openGL version. Can someone please show me how it can be done? (And, no, this is *not* for a class assignment–I graduated last year!)

thanks!

Jonathan

– Pasted Max Patch, click to expand. –
#66687
Feb 25, 2013 at 7:21pm

what have you tried?

#240035
Feb 26, 2013 at 6:08am

As a totally openGL illiterate Jitter user, I’ve scoured the Jitter tutorials and the jit.gl object helpfiles in vain for obvious ways to replace the jit.matrix objects with jit.gl objects. (They may well be there, but they’re not obvious to me.)

Next, I tracked down an example of an openGL slitscan patch that had been posted on the forums a few years ago. (See patch attached below.)

I’ve studied the patch for quite a while and more or less understand how it functions. Unfortunately, I’m still totally clueless about how to tweak it so that it would function like the jit.matrix based patch I attached in my original post.

– Pasted Max Patch, click to expand. –
#240036
Feb 26, 2013 at 9:20pm

i’ve updated the patch found here, to include more modern max 6 gl techniques.

http://cycling74.com/forums/topic.php?id=42944

– Pasted Max Patch, click to expand. –
#240037
Feb 27, 2013 at 4:48am

Thanks so much for your assistance.

One problem: the first column of pixels of the slit scan is grey rather than showing the current slit frame. Is there an easy way to fix that?

#240038
Mar 5, 2013 at 8:34am

Can anyone help me resolve this issue with the first column or row of pixels being grey?

#240039

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