[Therion] Development 5.4.1+4369eea inverts and recolours altitude legend

[Stacho Mudrak]

Hi Bruce,

thanks for pointing out this bug. I will check the order of numbers, I have
probably made some mistake when dealing with automatic color scale
generation.

I have rewritten the scale code completely, but I had no time until now to
write the docs. But if you want to try, something like that should now work
in the layout:

lookup altitude -title "Altitude legend"
700 [100 0 0] "700 m a.s.l."
680
660
640
620
600 [0 0 100] "below 600 m"
endlookup

It should generate red -> blue scale with desired values. Also explo-date,
topo-date should now work with addition to maps, scraps. E.g.

export map -layout-color map-fp topo-date

and for example:

lookup topo-date
2010.12.31 [] "2010 and before"
2011.12.31 [] 2011
2012.12.31 [] 2012
- [] "2013 and later"
endlookup

You may specify multiple lookup tables for same criterion using ":"
separator in label

lookup altitude:scale1
600
800
endlookup

and

lookup altitude:scale2
800
750
700
endlookup

and use then "color map-fg altitude:scale1" or "color map-fg
altitude:scale2"

You may use also:

lookup maps
map1 at some_survey [color]
map2 [color]
map3 [color]
endlookup

Same should work with scraps. With maps, also more simple way should work -
you may specify color of a particular map within selection.

select map1 -color [100 0 0]

Also intervals should work:

lookup altitude
[1500 1600] [] "cave floor 1"
[1800 1900] [] "cave floor 2"
endlookup

If you are willing to try, I would appreciate any feedback. Probably there
are a lot of bugs because a lot of use-cases. I was not able to test them
all.

S.

On 2 November 2017 at 10:05, Bruce Mutton via Therion <therion at speleo.sk>
wrote:

> I’ve just noticed that the latest development snapshot 5.4.1+4369eea seems
> to have messed with the altitude legend.
>
> You can see from the screenshot below, which shows part of identical
> project compilations, one with 9d96803 and then one with 4369eea.
>
> Pretty sure I have not made any other changes that could have caused this
> at my end, and I see that some of the intervening commits on github relate
> to colour changes.
>
>
>
> Neutral (perhaps) changes are that there are more colour bands and the
> colours are brighter, in the legend at least, though not in the map.
>
> A negative change is that the altitude range is now upside down.
>
>
>
> Bruce
>
>
>
>
> _______________________________________________
> Therion mailing list
> Therion at speleo.sk
> https://mailman.speleo.sk/listinfo/therion
>
>
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