gavspav

I've drawn a waveform in a gl window using a patch I found here on the forums.

The waveform represents a buffer which I am playing using groove~

What I would like to do is draw a moving playhead over this waveform.

Here's my first attempt but noob alert - it ain't pretty!

Can anyone point me in the right direction for a cheap solution?

draw-a-moving-playhead-over-a-waveform

cant see the patch at the moment, but did you try the line $1 message?

I would take the sync output of groove~ into snapshot, multiply it by the 'total time' output of info~ and then into a 'line $1' message ->waveform~

cant see the patch at the moment, but did you try the line $1 message? 

I would take the sync output of groove~ into snapshot, multiply it by the 'total time' output of info~ and then into a 'line $1' message ->waveform~


Hmm waveform~ draws to the patcher window. You can't display it in a GL context can you?

My patch is basically what you describe but using linesegment and ji.gl.sketch.

Next attempt. Getting closer now but I could still use some help!

It uses the patch from the following thread.Thanks Graham

https://cycling74.com/forums/jit-gl-graph-for-a-waveform-display

It uses the patch from the following thread.Thanks Graham
https://cycling74.com/forums/jit-gl-graph-for-a-waveform-display


closer, a few changes, but still the main issue remains :/

Think I must have been losing the plot when I posted this.

Drawing a playhead marker is alot simpler than this - just using jit.gl.sketch and a variable position does the trick.