2022-09-01 10:55:46 +02:00
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#!/usr/bin/python3
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# --------------------------------------------------------------------------------------
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#http://astrodinamica.altervista.org/ESU/sundial/Condensed-vector-theory.pdf
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#https://www.helios-sonnenuhren.de/sites/default/files/upload/the_calculation_of_declining_and_inclining_sundials_an_unusual_approach.pdf
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# --------------------------------------------------------------------------------------
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from __future__ import division
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import inkex
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from datetime import datetime, time, timedelta
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from math import *
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from lxml import etree
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class sundialDeclining(inkex.EffectExtension):
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def add_arguments(self, pars):
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pars.add_argument("--latitude", type=float, dest="latitude", default="50.3515")
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pars.add_argument("--longitude", type=float, dest="longitude", default="15.7512")
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pars.add_argument("--timezone", type=int, dest="timezone", default="0")
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pars.add_argument("--summer_time", type=inkex.Boolean, dest="summer_time", default='False')
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pars.add_argument("--gnom", type=float, dest="gnom", default="30")
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pars.add_argument("--decl", type=float, dest="decl", default="0")
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pars.add_argument("--incl", type=float, dest="incl", default="0")
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pars.add_argument("--DL", type=float, dest="DL", default="0")
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pars.add_argument("--tab")
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def effect(self):
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def draw_SVG_line(x1, y1, x2, y2, width, stroke, name, parent):
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style = { 'stroke': stroke, 'stroke-width':str(width), 'fill': 'none' }
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line_attribs = {'style':str(inkex.Style(style)),
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inkex.addNS('label','inkscape'):name,
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'd':'M '+str(x1)+','+str(y1)+' L '+str(x2)+','+str(y2)}
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etree.SubElement(parent, inkex.addNS('path','svg'), line_attribs )
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def draw_SVG_circle(cx, cy, r, width, stroke, fill, name, parent):
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style = { 'stroke': stroke, 'stroke-width':str(width), 'fill':fill}
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circle_attribs = {'style':str(inkex.Style(style)),
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inkex.addNS('label','inkscape'):name,
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'cx':str(cx), 'cy':str(cy), 'r':str(r)}
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etree.SubElement(parent, inkex.addNS('circle','svg'), circle_attribs )
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def draw_SVG_tri(x1, y1, x2, y2, x3, y3, width, stroke, name, parent):
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style = { 'stroke': stroke, 'stroke-width':str(width), 'fill': 'none' }
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tri_attribs = {'style':str(inkex.Style(style)),
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inkex.addNS('label','inkscape'):name,
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'd':'M '+str(x1)+','+str(y1)+
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' L '+str(x2)+','+str(y2)+
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' L '+str(x3)+','+str(y3)+
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' L '+str(x1)+','+str(y1)+' z'}
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etree.SubElement(parent, inkex.addNS('path','svg'), tri_attribs )
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def draw_SVG_rect(x, y, w, h, width, fill, name, parent):
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style = { 'stroke': '#000000', 'stroke-width':str(width), 'fill':fill}
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rect_attribs = {'style':str(inkex.Style(style)),
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inkex.addNS('label','inkscape'):name,
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'x':str(x), 'y':str(y), 'width':str(w), 'height':str(h)}
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etree.SubElement(parent, inkex.addNS('rect','svg'), rect_attribs )
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def draw_SVG_polyline(DP, width, colour, fill, name, parent):
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style = { 'stroke': colour, 'stroke-width': str(width), 'fill':fill}
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polyline_attribs = {'style':str(inkex.Style(style)),
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inkex.addNS('label','inkscape'):name,
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'd':'M' +str(DP)}
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etree.SubElement(parent, inkex.addNS('path','svg'), polyline_attribs )
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def draw_SVG_text(x, y, textvalue, font, text_size, parent):
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text = etree.Element(inkex.addNS('text','svg'))
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text.set('x', str(x))
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text.set('y', str(y))
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2022-11-04 22:26:10 +01:00
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style = {'text-align' : 'center', 'font-family': str(font) ,'text-anchor': 'middle', 'alignment-baseline' : 'central', 'font-size' : str(text_size)}
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2022-09-01 10:55:46 +02:00
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text.set('style', str(inkex.Style(style)))
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text.text = textvalue
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parent.append(text)
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so = self.options
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parent = self.svg.get_current_layer()
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border=5
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widthgrid = 200
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heightgrid = 150
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# Grid
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Gx=15
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Gy=9
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# Get SVG document dimensions
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svg = self.document.getroot()
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width = self.svg.unittouu(svg.get('width'))
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height = self.svg.unittouu(svg.attrib['height'])
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# Embed grid in group
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#Put in in the centre of the current view
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#t = 'translate(' + str( self.view_center[0]- width/2.0) + ',' + str( self.view_center[1]- height/2.0) + ')'
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#t = 'translate(0,' + str(height) + ') rotate(-180,0,0)'
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t = 'translate(' + str(width/2) + ',' + str(border) + ')'
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#t = 'translate(0 ,0)'
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g_attribs = {inkex.addNS('label','inkscape'):'SunDial_Lat:' + str( so.latitude )+';Long:'+str( so.longitude ),'transform':t}
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grid = etree.SubElement(self.svg.get_current_layer(), 'g', g_attribs)
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#Group for x gridlines
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g_attribs = {inkex.addNS('label','inkscape'):'XGridlines'}
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glx = etree.SubElement(grid, 'g', g_attribs)
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#Group for y gridlines
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g_attribs = {inkex.addNS('label','inkscape'):'YGridlines'}
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gly = etree.SubElement(grid, 'g', g_attribs)
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#Group for Hour lines vertical SunDial
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g_attribs = {inkex.addNS('label','inkscape'):'VerticalHourLines'}
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vhl = etree.SubElement(grid, 'g', g_attribs)
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#Group for Nodus vertical SunDial
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g_attribs = {inkex.addNS('label','inkscape'):'Nodus'}
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nod = etree.SubElement(grid, 'g', g_attribs)
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#Group for zodiac line
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g_attribs = {inkex.addNS('label','inkscape'):'Line of zodiac'}
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loz = etree.SubElement(grid, 'g', g_attribs)
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# ----------Grid and border------------------------------------------------------------------
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# Border
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draw_SVG_rect(-width/2+border, -0, width-2*border, heightgrid, 0.8, 'none', 'Border', grid) #border rectangle
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# XGridLine
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for i in range(Gx): #x divisons
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distX=widthgrid/(Gx-1)
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draw_SVG_line(distX*i-width/2+border, heightgrid, distX*i-width/2+border, 0, 0.1, '#0000FF', 'X'+str(i), glx)
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# YGridLine
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for i in range(Gy): #y divisons
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distY=heightgrid/(Gy-1)
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draw_SVG_line(-width/2+border, distY*i, width/2-border, distY*i, 0.1, '#0000FF', 'Y'+str(i), gly)
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# ----------------------------------------------------------------------------
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Time = [4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
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T = {} #
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T_rad = {} #
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# Line of zodiac
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if so.DL == 0:
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D = []
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if so.DL == 3:
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D = [-23.44, 0.0001, 23.44]
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if so.DL == 7:
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D = [-23.44, -20.15, -11.47, 0.0001, 11.47, 20.15, 23.44] #https://www.mysundial.ca/tsp/the_zodiac.html
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D_rad = {}
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W = so.decl*pi/180 # Declination of wall in radian https://www.mysundial.ca/tsp/vertical_declining_sundial.html
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R = so.incl*pi/180 # Inclination of wall in radian
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L = so.latitude*pi/180 # Latitude in radian
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#Text
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textvalue='Sundials for Latitude: %s; Wall azimuth: %s; Wall inclination: %s --- (c)2019 Tomas Urban ' % (so.latitude, round(W*180/pi,2), round(R*180/pi,2))
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draw_SVG_text(0, heightgrid+4, textvalue, 'san-serif', 4, gly)
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# ----------Gnomon ----------------------------------------------------------------------------
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Xf =-so.gnom*(sin(W)*cos(L))/(cos(R)*cos(W)*cos(L)-sin(R)*sin(L))
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Zf = so.gnom*((sin(R)*cos(W)*cos(L))+(cos(R)*sin(L)))/(cos(R)*cos(W)*cos(L)-sin(R)*sin(L))
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g = asin(cos(R)*cos(W)*cos(L)-sin(R)*sin(L))
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f = atan(-sin(W)*cos(L)/(sin(R)*cos(W)*cos(L)+cos(R)*sin(L)))
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P = -so.gnom/(cos(R)*cos(W)*cos(L)-sin(R)*sin(L))
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#Text
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#textvalue='Xf: %s; Zf: %s; g: %s; P: %s; f: %s' % (round(Xf,2), round(Zf,2), round(g*180/pi,2), round(P,2), round(f*180/pi,2))
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#draw_SVG_text(0, 120, textvalue, 'san-serif', 4, gly)
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#textvalue='G*cos(f): %s; G*sin(f): %s; g: %s; P: %s; f: %s' % (round(so.gnom*cos(f),2), round(so.gnom*sin(f),2), round(so.gnom*180/pi,2), round(P,2), round(f*180/pi,2))
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#draw_SVG_text(0, 125, textvalue, 'san-serif', 4, gly)
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# Horizont line
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draw_SVG_line(-width/2+border, Zf, width/2-border, Zf, 0.5, '#000000', 'Horizont line', nod)
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# Nodus
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a = (0,0)
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b = (-Xf, Zf)
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c = (-Xf+so.gnom*cos(f),Zf+so.gnom*sin(f))
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draw_SVG_tri(a[0], a[1], b[0], b[1], c[0], c[1], 0.35, '#FF00FF', 'Nodus', nod)
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draw_SVG_circle(-Xf,Zf, 2, 0.3, '#000000', '#0000FF', 'Nodus', nod)
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# --------- Line of zodiac ----------------------------------------------------------------------
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A = -cos(R)*sin(W)
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B = -cos(R)*cos(W)
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C = sin(R)
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#textvalue='A: %s; B: %s; C: %s' % (A, B, C)
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#draw_SVG_text(0, 125, textvalue, 'san-serif', 4, gly)
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for i in range(len(D)):
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D_rad[i]= D[i]*pi/180
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DP=''
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for ii in range(len(Time)):
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T[ii]=(Time[ii]-12)*15
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T_rad[ii]=T[ii]*pi/180
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AzSun = atan(sin(T_rad[ii])/(sin(L)*cos(T_rad[ii]) - tan(D_rad[i])*cos(L)))
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AltSun = asin(sin(D_rad[i])*sin(L) + cos(D_rad[i])*cos(L)*cos(T_rad[ii]))
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if T[ii] < 0:
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if AzSun > 0:
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AzSun=AzSun+pi
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else:
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AzSun = AzSun+2*pi
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else:
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if AzSun >= 0:
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AzSun=AzSun
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else:
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AzSun = AzSun+pi
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#Text
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#textvalue='AzSun: %s; AltSun: %s; T: %s' % (round(AzSun*180/pi,2), round(AltSun*180/pi,2), Time[ii])
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#draw_SVG_text(200, 220+5*ii+100*i, textvalue, 'san-serif', 4, gly)
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X0= -cos(AltSun)*sin(AzSun)
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Y0= -cos(AltSun)*cos(AzSun)
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Z0= sin(AltSun)
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X1=X0*cos(W)-Y0*sin(W)
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Y1=X0*sin(W)+Y0*cos(W)
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Z1=Z0
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X2=X1
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Y2=Y1*cos(R)-Z1*sin(R)
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Z2=Y1*sin(R)+Z1*cos(R)
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X3=so.gnom*X2/Y2
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Z3=-so.gnom*Z2/Y2
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p1= X0*A+Y0*B+Z0*C
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Xe = X3 - Xf
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Ze = Z3 + Zf
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if p1 >0:
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DP = DP +' '+str(Xe)+', '+str(Ze)
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# draw polyline
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draw_SVG_polyline(DP, 0.5,'#FF0000', 'none', 'Zodiac line '+str(i+1), loz)
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# --------- Time Line ----------------------------------------------------------------------
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ALFA= atan(widthgrid/(2*heightgrid)) # Line for help
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for i in range(len(Time)):
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T[i]=(Time[i]-12)*15
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T_rad[i]=T[i]*pi/180
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TL=''
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D = [-23.44, -20.15, -11.47, 0.0001, 11.47, 20.15, 23.44]
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for ii in range(len(D)):
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D_rad[ii]= D[ii]*pi/180
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TL= '0, 0'
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AzSun = atan(sin(T_rad[i])/(sin(L)*cos(T_rad[i]) - tan(D_rad[ii])*cos(L)))
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AltSun = asin(sin(D_rad[ii])*sin(L) + cos(D_rad[ii])*cos(L)*cos(T_rad[i]))
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if T[i] < 0:
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if AzSun > 0:
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AzSun=AzSun+pi
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else:
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AzSun = AzSun+2*pi
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else:
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if AzSun >= 0:
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AzSun=AzSun
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else:
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AzSun = AzSun+pi
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X0= -cos(AltSun)*sin(AzSun)
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Y0= -cos(AltSun)*cos(AzSun)
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Z0= sin(AltSun)
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X1=X0*cos(W)-Y0*sin(W)
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Y1=X0*sin(W)+Y0*cos(W)
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Z1=Z0
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X2=X1
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Y2=Y1*cos(R)-Z1*sin(R)
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Z2=Y1*sin(R)+Z1*cos(R)
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X3=so.gnom*X2/Y2
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Z3=so.gnom*Z2/Y2
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Xe = X3 - Xf
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Ze = -Z3 + Zf
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if Ze == 0:
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Ze = 0.0001
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SG = atan(Xe/Ze)
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#Xe = so.gnom /((cos(R)/tan(AzSun-W))+(sin(R)*tan(AltSun)/sin(AzSun-W))) - Xf
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#Ze = -so.gnom *((tan(R)-(tan(AltSun)/cos(AzSun-W)))/(1+(tan(R)*tan(AltSun))/cos(AzSun-W))) + Zf
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p1= X0*A+Y0*B+Z0*C
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if p1 >=0:
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#if SG <= pi and SG >=-pi:
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TL = TL +' '+str(Xe)+', '+str(Ze)
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else:
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Xe=-Xe
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Ze=-Ze
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TL = TL +' '+str(Xe)+', '+str(Ze)
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if T[i] < 0:
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if SG >= 0:
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SG = SG-pi
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else:
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SG = SG
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else:
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if SG >= 0:
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SG = SG
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else:
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SG = SG+pi
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if SG >= (-pi) and SG < -ALFA:
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draw_SVG_text(-widthgrid/2+5, -widthgrid/(2*tan(SG)), str(Time[i]), 'Algerian', 8, vhl)
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if SG > (-ALFA) and SG < ALFA:
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draw_SVG_text(heightgrid*tan(SG), heightgrid-5, str(Time[i]), 'Algerian',8, vhl)
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if SG > ALFA and SG <= (pi):
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if Time[i] == 12: #workaround because y coordinate gets extreme values like "-816561967659768448.0000"
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draw_SVG_text(0, heightgrid-5, str(Time[i]), 'Algerian',8, vhl)
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else:
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draw_SVG_text(widthgrid/2-8, widthgrid/(2*tan(SG)), str(Time[i]), 'Algerian',8, vhl)
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#Text
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#textvalue='Xe: %s; Ze: %s; T: %s; SG: %s' % (round(Xe,2), round(Ze,2), Time[i], SG*180/pi)
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#draw_SVG_text(0, 220+5*i, textvalue, 'san-serif', 4, gly)
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# draw polyline
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draw_SVG_polyline(TL, 0.5,'#008000', 'none', 'Time line '+str(Time[i]), loz)
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if __name__ == '__main__':
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sundialDeclining().run()
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