| Re: Compare Filled Contour Plot in Three Graphics Systems [message #78950 is a reply to message #78884] |
Thu, 05 January 2012 23:45   |
TonyL
Messages: 14
Registered: November 2008
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Junior Member |
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On Jan 6, 3:47 pm, David Fanning <n...@dfanning.com> wrote:
> TonyL writes:
>> I've got the Function Graphics (FG) version running in 3.8secs (dual
>> core Win7 64bit PC), including opening the data file and saving to a
>> PNG file. I'll email you the code if you like separately; noting that
>> I'm using the 8.2 beta. Symbol for Fort Collins plots OK.
>
> I'd like to see it. I don't have the IDL 8.2 beta. (No one asked
> me to review it!) But, I'll see if I can get ahold of it. :-)
>
>> The anti-aliased fonts and lines in the saved PNG file are equivalent
>> in quality to ones I've previously created via the Postscript route,
>> using Direct Graphics and using the ImageMagick library. The FG is
>> more convenient for me because I don't have to grapple with
>> installation issues of the ImageMagick library. I haven't timed that
>> ImageMagick approach, but suspect there is not a sufficiently large
>> time difference from the FG time for it to bother me.
>
> Well, it's about 1.3 seconds on my decidedly normal machine.
>
>> In fact I have a greater use of the ability to replot the same data
>> over several different geographic domains, for zooming purposes. By
>> simply changing the map limit, the output can be modified in 0.2 secs,
>> a similar time to the DG approach but without having to redraw all the
>> elements.
>
> Humm. Don't know how not having to redraw all the elements would
> work. Doesn't seem possible to me! But, my cgMap object will work
> in the same way and in the same amount of time, I imagine, since
> they are both using Map_Proj_Init under the hood.
>
>> The weakness I currently see in FG relate to the lack of a decent
>> Colorbar equivalent to the CGcolorbar. Support for the Brewer tables
>> is also lacking.
>
> Yes, among other weaknesses. I realize you can't really answer
> questions about IDL 8.2, but I would be curious if the colorbar
> still has to be attached to a target in IDL 8.2. That seemed
> to be its biggest weakness to me.
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.idlcoyote.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")
Yes in the beta, Colorbar still has a target plot that it uses. I've
raised the desirability of a better Colorbar and Brewer table support
with Exelis.
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