Very clever! -tk
On Thu, Apr 5, 2018 at 12:36 PM, RobbH <holme...@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 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. 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.
