Interesting, Nice and simple too. Just dropped the code into the main index template here and it works well.
I'm using Metric and kph ( km/h ) here and I don't see anything unusual in its scaling. http://203.213.243.61/weewx/ In fact, it's probably a keeper. Just need to find a more suitable spot to place it. Cheers Glenn rorpi - read only raspberry pi & various weewx addons https://github.com/glennmckechnie On 6 April 2018 at 07:25, RobbH <holme...@gmail.com> wrote: > It's available (temporarily) here: > > http://rh3.operamail.com/windrose_testing.svg > > On Thursday, April 5, 2018 at 3:45:58 PM UTC-4, Alec Bennett wrote: >> >> Possible to see the generated output of that somewhere? >> >> On Thu, Apr 5, 2018 at 12:36 PM, RobbH <holm...@gmail.com> wrote: >>> >>> I finally came to the realization that everything I wanted to do could be >>> done with the Cheetah engine, and even learned a tiny bit of Python in the >>> process. The following code, added to index,html.tmpl (or some other >>> template) generates a crude compass rose with up to two directional vanes, >>> one (in red) for gust direction and one (in blue) for wind direction. The >>> length of the vanes is proportional to the corresponding speed value, on a >>> logarithmic scale. >>> >>> #import math >>> <svg version="1.1" baseProfile="full" width="200" height="200" >>> xmlns="http://www.w3.org/2000/svg";> >>> <!-- draw outer ring, then 10-degree tickmarks, 2 gray inner >>> circles and 3 scale labels (1, 10, 100) --> >>> <circle cx="90" cy="85" r="75" stroke="black" stroke-width="5" >>> stroke-dasharray="1,12.08" fill="transparent" /> >>> <circle cx="90" cy="85" r="80" stroke="lightgray" >>> stroke-width="10" fill="transparent" /> >>> <circle cx="90" cy="85" r="38" stroke="lightgray" >>> fill="transparent" /> >>> <circle cx="90" cy="85" r="56" stroke="lightgray" >>> fill="transparent" /> >>> <text x="120" y="26" font-size="8" text-anchor="middle" >>> fill="gray">100</text> >>> <text x="112" y="42" font-size="8" text-anchor="middle" >>> fill="gray">10</text> >>> <text x="103" y="58" font-size="8" text-anchor="middle" >>> fill="gray">1</text> >>> <!-- draw compass rose background (2 polygons) then 4 directional >>> letters and innermost circle --> >>> <polygon points="90 35, 100 75, 140 85, 100 95, 90 135, 80 95, 40 >>> 85, 80 75" fill="lightgray" transform="rotate(45 90 85)" /> >>> <polygon points="90 25, 100 75, 150 85, 100 95, 90 145, 80 95, 30 >>> 85, 80 75" fill="lightgray" /> >>> <text x="90" y="22" font-size="16" text-anchor="middle" >>> fill="gray">N</text> >>> <text x="90" y="159" font-size="16" text-anchor="middle" >>> fill="gray">S</text> >>> <text x="22" y="91" font-size="16" text-anchor="middle" >>> fill="gray">W</text> >>> <text x="158" y="91" font-size="16" text-anchor="middle" >>> fill="gray">E</text> >>> <circle cx="90" cy="85" r="20" stroke="black" fill="white" /> >>> <!-- put current values for gust and wind speed in inner circle, >>> then calculate and draw vanes if direction given and speed > 0 --> >>> <text x="90" y="83" font-size="12" text-anchor="middle" >>> fill="orangered">$current.windGust.formatted</text> >>> <text x="90" y="97" font-size="12" text-anchor="middle" >>> fill="dodgerblue">$current.windSpeed.formatted</text> >>> #if $current.windGustDir.formatted != " N/A" and >>> float($current.windGust.formatted) > 0 >>> #set $wg = 65 - 18 * (1 + >>> math.log(float($current.windGust.formatted), 10)) >>> <polygon points="90 $wg, 100 65, 80 65" fill="orangered" >>> transform="rotate($current.windGustDir.formatted 90 85)" /> >>> #end if >>> #if $current.windDir.formatted != " N/A" and >>> float($current.windSpeed.formatted) > 0 >>> #set $ws = 65 - 18 * (1 + >>> math.log(float($current.windSpeed.formatted), 10)) >>> <polygon points="90 $ws, 95 65, 85 65" fill="dodgerblue" >>> transform="rotate($current.windDir.formatted 90 85)" /> >>> #end if >>> </svg> >>> >>> >>> This is set up to work with speeds measured in miles per hour. Some >>> modification would be needed to make it work with other units. I hope >>> someone will find it useful. Improvements welcome. >>> >>> >>> On Monday, April 2, 2018 at 8:21:51 PM UTC-4, RobbH wrote: >>>> >>>> Very nice! That's not exactly what I'm attempting right now, but I'll >>>> keep in mind for the future. >>>> >>>> I hope you'll add it to the weewx wiki, so it'll be easy to find in the >>>> future. >>>> >>>> I didn't find the realtime gauge data extension in the wiki, either, but >>>> found it here: >>>> >>>> https://github.com/gjr80/weewx-realtime_gauge-data >>>> >>>> >>>> >>>> On Sunday, April 1, 2018 at 10:32:53 PM UTC-4, Alec Bennett wrote: >>>>> >>>>> > On the other hand, it may be possible to do all I need with >>>>> > javascript, and I'll probably try that first. >>>>> >>>>> If you want to use javascript, you might be interested in this project >>>>> of mine: >>>>> >>>>> github.com/wrybread/Weather-Underground-Style-Real-Time-Gauge >>>>> >>>>> Personally I think javascript is a good method for current wind >>>>> conditions, since it makes it easy to update a graphic continually. This >>>>> live demo should update every 2 seconds or so (every time the wind >>>>> indicator >>>>> turns green is an update): >>>>> >>>>> sinkingsensation.com/wu_gauge/ >>>>> >>>>> I should really update that though, since it's very small on my screen. >>>>> A CSS issue. Or here (css optimized for mobile): >>>>> >>>>> sinkingsensation.com/wind >>>>> >>>>> Note that this requires enabling the RTC ("real time gauge") extension >>>>> in weewx. And fyi the effect is achieved by rotating the circle to the >>>>> current wind direction. >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>>> >>>>>> A crude version, without making the wind directional pointer >>>>>> proportional to wind speed, can be done with svg graphics and no outside >>>>>> help. I've posted that to the old thread that I linked in the first post. >>>>>> >>>>>> >>>>>> On Friday, March 30, 2018 at 8:27:41 PM UTC-4, RobbH wrote: >>>>>>> >>>>>>> Maybe, at long last, I'm going to have to buckle down and learn >>>>>>> enough of Python to do this! >>>>>>> >>>>>>> >>>>>>> On Friday, March 30, 2018 at 6:51:49 PM UTC-4, vince wrote: >>>>>>>> >>>>>>>> On Friday, March 30, 2018 at 1:54:30 PM UTC-7, RobbH wrote: >>>>>>>>> >>>>>>>>> Still pursuing this, and I have learned how to generate the sort of >>>>>>>>> image I want, but not within Weewx. Is it possible call an external >>>>>>>>> program >>>>>>>>> (shell script) during each report cycle? >>>>>>>>> >>>>>>>> >>>>>>>> It is possible to do darn near anything if you write an extension to >>>>>>>> do so.....assuming the account weewx runs as has privileges to do so. >>>>>>>> >>> >>> -- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "weewx-user" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/weewx-user/FAaVIAv-Hfs/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> weewx-user+...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >> >> > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to weewx-user+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "weewx-user" group. 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