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Author Topic: Draw Sun Angle in Plan  (Read 2095 times)

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GDF

  • Water Moccasin
  • Posts: 2081
Draw Sun Angle in Plan
« on: June 22, 2018, 08:15:43 AM »
I'm fishing for a lisp routine that will draw in plan the sun angle based upon AutoCAD's Geographic Location palette settings.
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Why is there never enough time to do it right, but always enough time to do it over?
BricsCAD 2020x64 Windows 10x64

GDF

  • Water Moccasin
  • Posts: 2081
Re: Draw Sun Angle in Plan
« Reply #1 on: June 22, 2018, 08:34:30 AM »
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Why is there never enough time to do it right, but always enough time to do it over?
BricsCAD 2020x64 Windows 10x64

huiz

  • Swamp Rat
  • Posts: 919
  • Certified Prof C3D
Re: Draw Sun Angle in Plan
« Reply #2 on: June 22, 2018, 10:01:39 AM »
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The conclusion is justified that the initialization of the development of critical subsystem optimizes the probability of success to the development of the technical behavior over a given period.

GDF

  • Water Moccasin
  • Posts: 2081
Re: Draw Sun Angle in Plan
« Reply #3 on: June 22, 2018, 01:36:14 PM »
(defun C:SUN1 ()(command "start" "http://andrewmarsh.com/apps/releases/sunpath2d.html")(princ))
(defun C:SUN2 ()(command "start" "http://www.sunpath.in/#/29.1617,-82.1779,12/2018.06.22/13:51")(princ))
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Why is there never enough time to do it right, but always enough time to do it over?
BricsCAD 2020x64 Windows 10x64

GDF

  • Water Moccasin
  • Posts: 2081
Re: Draw Sun Angle in Plan
« Reply #4 on: June 24, 2018, 12:27:26 PM »
Ok, you math-trig masters:

What I am trying to achieve is the approximate shadow angle calculator for a vertical wall... solar zenith angle. by plugging in the necessary variables.
(hopefully I'm expressing this correctly)
Lattitude =
Time of day =
Month =

To get the solar zenith angle

Can anyone help me with a calculator formula example?


;;;https://en.wikipedia.org/wiki/Solar_azimuth_angle#Formulas
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Why is there never enough time to do it right, but always enough time to do it over?
BricsCAD 2020x64 Windows 10x64

huiz

  • Swamp Rat
  • Posts: 919
  • Certified Prof C3D
Re: Draw Sun Angle in Plan
« Reply #5 on: June 24, 2018, 02:47:30 PM »
You can download an Excel file here:


https://www.esrl.noaa.gov/gmd/grad/solcalc/NOAA_Solar_Calculations_day.xls


Fill in the location and date and it will fill everything you need. Formulas are in the cells.


Be aware of the theoretical results, For really accurate calculations you need to respect the influence of the atmosphere, true north and the elevation of EG (or bumpy terrains). I think a few degrees are acceptable for theoretical calculations.
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The conclusion is justified that the initialization of the development of critical subsystem optimizes the probability of success to the development of the technical behavior over a given period.

GDF

  • Water Moccasin
  • Posts: 2081
Re: Draw Sun Angle in Plan
« Reply #6 on: June 24, 2018, 03:04:30 PM »
Thanks

I'm also looking for additional drawing files from different latitudes like the one enclosed for London:
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Why is there never enough time to do it right, but always enough time to do it over?
BricsCAD 2020x64 Windows 10x64
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