Cycling 74 » Topic: Draw a moving playhead over a waveform http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/feed Thu, 20 Jun 2013 03:30:56 +0000 http://bbpress.org/?v=2.2.4 http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-50617 <![CDATA[Draw a moving playhead over a waveform]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-50617 Thu, 27 May 2010 20:27:18 +0000 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?

– Pasted Max Patch, click to expand. –
]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-181593 <![CDATA[Re: Draw a moving playhead over a waveform]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-181593 Thu, 27 May 2010 22:20:51 +0000 Nick Inhofe 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~

]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-181594 <![CDATA[Re: Draw a moving playhead over a waveform]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-181594 Thu, 27 May 2010 22:29:32 +0000 gavspav 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.

But the results are rubbish!

]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-181595 <![CDATA[Re: Draw a moving playhead over a waveform]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-181595 Thu, 27 May 2010 23:11:22 +0000 Nick Inhofe ah i see. i missed the gl part. :

]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-181596 <![CDATA[Re: Draw a moving playhead over a waveform]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-181596 Fri, 28 May 2010 07:53:25 +0000 gavspav Next attempt. Getting closer now but I could still use some help!

It uses the patch from the following thread.Thanks Graham

http://www.cycling74.com/forums/topic.php?id=21071

– Pasted Max Patch, click to expand. –
]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-181597 <![CDATA[Re: Draw a moving playhead over a waveform]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-181597 Mon, 31 May 2010 07:01:56 +0000 seejayjames closer, a few changes, but still the main issue remains :/

– Pasted Max Patch, click to expand. –
]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-181598 <![CDATA[Re: Draw a moving playhead over a waveform]]> http://cycling74.com/forums/topic/draw-a-moving-playhead-over-a-waveform/#post-181598 Mon, 14 Jun 2010 16:19:34 +0000 gavspav 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.

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