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From: James on 12 Aug 2010 17:21
So I was adding a patch to a waterfall fft plot showing a threshold we didn't want to exceed. And although I can get the patch to be semi-transparent when the scale is linear it conks out and goes back to fully opaque when ANY one of the axes is set to a logarithmic scale. Anyone know of a work around?
From: Walter Roberson on 12 Aug 2010 19:03
James wrote:
> So I was adding a patch to a waterfall fft plot showing a threshold we
> didn't want to exceed. And although I can get the patch to be
> semi-transparent when the scale is linear it conks out and goes back to
> fully opaque when ANY one of the axes is set to a logarithmic scale.
> Anyone know of a work around?

OpenGL is the only renderer that supports transparency, but it also has the
side effect that it does not support transparency for log axes.

The only work-around is to log everything before sending it for rendering.
Could get messy for fonts...
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