Re: [Traverso-devel] Accuracy of waveform drawing, and performance

[Jonatan Liljedahl]

Remon wrote:
> Hello Traversers,
> 
> I wonder how important it is that the waveform reflect the _exact_ audio 
> data, 
> or if it's just enough  that the highest values are accurately displayed.
> 
> Traverso 0.40.0 uses polygons to draw the audio waveform, and as some of you 
> noticed, enabling painting on a QGLWidget (OpenGL, see settings dialog) 
> garbles the output.
> 
> Current cvs paints the waveform a little different, the polygon is only 
> created from each even pixel, so it skips a pixel at a time.
> The result is less calculation of course, and the opengl paint engine seems 
> to 
> have less trouble with it.
> 
> For a comparison:
> 
> http://traverso-daw.org/screenies/screen12.png
> 
> Topmost: polygon created with point for each pixel in the waveform
> Mid: polygon created with point created for every second pixel in the waveform
> Bottom: Traverso 0.30.0 line based painting

I'd definitely prefer the bottom one, 0.30.0 line based painting.
Function comes way above eye candy on my priority list!

-- 
/Jonatan         [ http://kymatica.com ]