Re: [Plplot-general] rgb colourscale interpolation

[Phil R. <p.d...@gm...>]

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...@gm...] > > 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. Regards, Arjen DISCLAIMER: This message is intended exclusively for the addressee(s) and may contain confidential and privileged information. If you are not the intended recipient please notify the sender immediately and destroy this message. Unauthorized use, disclosure or copying of this message is strictly prohibited. The foundation 'Stichting Deltares', which has its seat at Delft, The Netherlands, Commercial Registration Number 41146461, is not liable in any way whatsoever for consequences and/or damages resulting from the improper, incomplete and untimely dispatch, receipt and/or content of this e-mail.