I can confirm that it is definitely awkward to interpolate in RGB space and
then correctly set the direction parameter to avoid wierd interpolation effects
by going the wrong way round the colour wheel. I've just spent the time since I
sent the first email trying to do it and now my head hurts, I've given up and
in true British style I've gone and made myself a cup of tea :-D
If the consensus is as Arjen and I see it then I'll make the required changes
asap.
Phil
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From: Arjen Markus
Sent: Tuesday, 24 July, 14:35
Subject: RE: [Plplot-general] rgb colourscale interpolation
To: Phil Rosenberg, plplot_general
Hi Phil, > -----Original Message----- > From: Phil Rosenberg
[mailto:p.d.rosenb...@gmail.com] > > I feel that if someone provides colours in
rgb values we really should interpolate in > rgb values. Or at the very least
we need to make it very clear in the documentation > that we always interpolate
in hls space even if colours are provided as rgb. > > Any thoughts? > I agree:
if you specify the colours in RGB, then you are not interested in the HLS
colour space. Indeed it would be very awkward to select the RGB coordinates in
such a way that you get intermediate RGB colours, when the interpolation is
actually done in HLS. Maybe there are good reasons to do it like this, but then
I sure would like to hear them. I tend to think that it is simply an oversight.
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