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#!/usr/bin/env python
#Copyright (C) 2010 Jean-Luc JOULIN "JeanJouX" jean-luc.joulin@laposte.net
#This extension allow you to draw a isometric grid with inkscape
#There is some options including subdivision, subsubdivions and custom line width
#All elements are grouped with similar elements
#These grid are used for isometric view in mechanical drawing or piping schematic
#!!! Y Divisions can't be smaller than half the X Divions
#This program is free software; you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation; either version 2 of the License, or
#(at your option) any later version.
#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#GNU General Public License for more details.
#You should have received a copy of the GNU General Public License
#along with this program; if not, write to the Free Software
#Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
import inkex
import simplestyle, sys
from math import *
from simpletransform import computePointInNode
def draw_SVG_line(x1, y1, x2, y2, width, name, parent):
style = { 'stroke': '#000000', 'stroke-width':str(width), 'fill': 'none' }
line_attribs = {'style':simplestyle.formatStyle(style),
inkex.addNS('label','inkscape'):name,
'd':'M '+str(x1)+','+str(y1)+' L '+str(x2)+','+str(y2)}
inkex.etree.SubElement(parent, inkex.addNS('path','svg'), line_attribs )
def draw_SVG_rect(x,y,w,h, width, fill, name, parent):
style = { 'stroke': '#000000', 'stroke-width':str(width), 'fill':fill}
rect_attribs = {'style':simplestyle.formatStyle(style),
inkex.addNS('label','inkscape'):name,
'x':str(x), 'y':str(y), 'width':str(w), 'height':str(h)}
inkex.etree.SubElement(parent, inkex.addNS('rect','svg'), rect_attribs )
class Grid_Polar(inkex.Effect):
def __init__(self):
inkex.Effect.__init__(self)
self.OptionParser.add_option("--x_divs",
action="store", type="int",
dest="x_divs", default=5,
help="Major X Divisions")
self.OptionParser.add_option("--y_divs",
action="store", type="int",
dest="y_divs", default=5,
help="Major X Divisions")
self.OptionParser.add_option("--dx",
action="store", type="float",
dest="dx", default=10.0,
help="Major X divison Spacing")
self.OptionParser.add_option("--subdivs",
action="store", type="int",
dest="subdivs", default=2,
help="Subdivisions per Major X division")
self.OptionParser.add_option("--subsubdivs",
action="store", type="int",
dest="subsubdivs", default=5,
help="Subsubdivisions per Minor X division")
self.OptionParser.add_option("--divs_th",
action="store", type="float",
dest="divs_th", default=2,
help="Major X Division Line thickness")
self.OptionParser.add_option("--subdivs_th",
action="store", type="float",
dest="subdivs_th", default=1,
help="Minor X Division Line thickness")
self.OptionParser.add_option("--subsubdivs_th",
action="store", type="float",
dest="subsubdivs_th", default=0.3,
help="Subminor X Division Line thickness")
self.OptionParser.add_option("--border_th",
action="store", type="float",
dest="border_th", default=3,
help="Border Line thickness")
def effect(self):
self.options.dx = self.unittouu(str(self.options.dx) + 'px')
self.options.divs_th = self.unittouu(str(self.options.divs_th) + 'px')
self.options.subdivs_th = self.unittouu(str(self.options.subdivs_th) + 'px')
self.options.subsubdivs_th = self.unittouu(str(self.options.subsubdivs_th) + 'px')
self.options.border_th = self.unittouu(str(self.options.border_th) + 'px')
#Can't generate a grid too flat
#If the Y dimension is smallest than half the X dimension, fix it.
if self.options.y_divs<((self.options.x_divs+1)/2):
self.options.y_divs=int((self.options.x_divs+1)/2)
#Find the pixel dimensions of the overall grid
xmax = self.options.dx * (2*self.options.x_divs)
ymax = self.options.dx * (2*self.options.y_divs) / 0.866025
#Embed grid in group
#Put in in the centre of the current view
view_center = computePointInNode(list(self.view_center), self.current_layer)
t = 'translate(' + str( view_center[0]- xmax/2.0) + ',' + \
str( view_center[1]- ymax/2.0) + ')'
g_attribs = {inkex.addNS('label','inkscape'):'Grid_Polar:X' + \
str( self.options.x_divs )+':Y'+str( self.options.y_divs ),
'transform':t }
grid = inkex.etree.SubElement(self.current_layer, 'g', g_attribs)
#Group for major x gridlines
g_attribs = {inkex.addNS('label','inkscape'):'MajorXGridlines'}
majglx = inkex.etree.SubElement(grid, 'g', g_attribs)
#Group for major y gridlines
g_attribs = {inkex.addNS('label','inkscape'):'MajorYGridlines'}
majgly = inkex.etree.SubElement(grid, 'g', g_attribs)
#Group for major z gridlines
g_attribs = {inkex.addNS('label','inkscape'):'MajorZGridlines'}
majglz = inkex.etree.SubElement(grid, 'g', g_attribs)
#Group for minor x gridlines
if self.options.subdivs > 1:#if there are any minor x gridlines
g_attribs = {inkex.addNS('label','inkscape'):'MinorXGridlines'}
minglx = inkex.etree.SubElement(grid, 'g', g_attribs)
#Group for subminor x gridlines
if self.options.subsubdivs > 1:#if there are any minor minor x gridlines
g_attribs = {inkex.addNS('label','inkscape'):'SubMinorXGridlines'}
mminglx = inkex.etree.SubElement(grid, 'g', g_attribs)
#Group for minor y gridlines
if self.options.subdivs > 1:#if there are any minor y gridlines
g_attribs = {inkex.addNS('label','inkscape'):'MinorYGridlines'}
mingly = inkex.etree.SubElement(grid, 'g', g_attribs)
#Group for subminor y gridlines
if self.options.subsubdivs > 1:#if there are any minor minor x gridlines
g_attribs = {inkex.addNS('label','inkscape'):'SubMinorYGridlines'}
mmingly = inkex.etree.SubElement(grid, 'g', g_attribs)
#Group for minor z gridlines
if self.options.subdivs > 1:#if there are any minor y gridlines
g_attribs = {inkex.addNS('label','inkscape'):'MinorZGridlines'}
minglz = inkex.etree.SubElement(grid, 'g', g_attribs)
#Group for subminor z gridlines
if self.options.subsubdivs > 1:#if there are any minor minor x gridlines
g_attribs = {inkex.addNS('label','inkscape'):'SubMinorZGridlines'}
mminglz = inkex.etree.SubElement(grid, 'g', g_attribs)
draw_SVG_rect(0, 0, xmax, ymax, self.options.border_th,
'none', 'Border', grid) #Border of grid
#X DIVISION
#Shortcuts for divisions
sd = self.options.subdivs
ssd = self.options.subsubdivs
#Initializing variable
cpt_div=0
cpt_subdiv=0
cpt_subsubdiv=0
com_div=0
com_subdiv=0
com_subsubdiv=0
for i in range(1, (2*self.options.x_divs*sd*ssd)):
cpt_subsubdiv=cpt_subsubdiv+1
com_subsubdiv=1
if cpt_subsubdiv==self.options.subsubdivs:
cpt_subsubdiv=0
cpt_subdiv=cpt_subdiv+1
com_subsubdiv=0
com_subdiv=1
com_div=0
if cpt_subdiv==self.options.subdivs:
cpt_subdiv=0
com_subsubdiv=0
com_subdiv=0
com_div=1
if com_subsubdiv==1:
draw_SVG_line(self.options.dx*i/sd/ssd, 0,
self.options.dx*i/sd/ssd,ymax,
self.options.subsubdivs_th,
'MajorXDiv'+str(i), mminglx)
if com_subdiv==1:
com_subdiv=0
draw_SVG_line(self.options.dx*i/sd/ssd, 0,
self.options.dx*i/sd/ssd,ymax,
self.options.subdivs_th,
'MajorXDiv'+str(i), minglx)
if com_div==1:
com_div=0
draw_SVG_line(self.options.dx*i/sd/ssd, 0,
self.options.dx*i/sd/ssd,ymax,
self.options.divs_th,
'MajorXDiv'+str(i), majglx)
#Y DIVISONS
#Shortcuts for divisions
sd = self.options.subdivs
ssd = self.options.subsubdivs
taille=self.options.dx/sd/ssd #Size of unity
nb_ligne=(self.options.x_divs+self.options.y_divs)*self.options.subdivs*self.options.subsubdivs #Global number of lines
nb_ligne_x=self.options.x_divs*self.options.subdivs*self.options.subsubdivs #Number of lines X
nb_ligne_y=self.options.y_divs*self.options.subdivs*self.options.subsubdivs #Number of lines Y
#Initializing variable
cpt_div=0
cpt_subdiv=0
cpt_subsubdiv=0
com_div=0
com_subdiv=0
com_subsubdiv=0
for l in range(1, int(nb_ligne*4)):
cpt_subsubdiv=cpt_subsubdiv+1
com_subsubdiv=1
if cpt_subsubdiv==self.options.subsubdivs:
cpt_subsubdiv=0
cpt_subdiv=cpt_subdiv+1
com_subsubdiv=0
com_subdiv=1
com_div=0
if cpt_subdiv==self.options.subdivs:
cpt_subdiv=0
com_subsubdiv=0
com_subdiv=0
com_div=1
if ((2*l)-1)< (2*nb_ligne_x):
txa=taille*((2*l)-1)
tya=ymax
txb=0
tyb=ymax-(taille)/(2*0.866025)-(taille*((l-1))/(0.866025))
if com_subsubdiv==1:
draw_SVG_line(txa, tya,
txb,tyb,
self.options.subsubdivs_th,
'MajorYDiv'+str(i), mmingly)
draw_SVG_line(xmax-txa, tya,
xmax-txb,tyb,
self.options.subsubdivs_th,
'MajorZDiv'+str(l), mminglz)
if com_subdiv==1:
com_subdiv=0
draw_SVG_line(txa, tya,
txb,tyb,
self.options.subdivs_th,
'MajorYDiv'+str(i), mingly)
draw_SVG_line(xmax-txa, tya,
xmax-txb,tyb,
self.options.subdivs_th,
'MajorZDiv'+str(l), minglz)
if com_div==1:
com_div=0
draw_SVG_line(txa, tya,
txb,tyb,
self.options.divs_th,
'MajorYDiv'+str(i), majgly)
draw_SVG_line(xmax-txa, tya,
xmax-txb,tyb,
self.options.divs_th,
'MajorZDiv'+str(l), majglz)
if ((2*l)-1)==(2*nb_ligne_x):
txa=taille*((2*l)-1)
tya=ymax
txb=0
tyb=ymax-(taille)/(2*0.866025)-(taille*((l-1))/(0.866025))
if com_subsubdiv==1:
draw_SVG_line(txa, tya,
txb,tyb,
self.options.subsubdivs_th,
'MajorYDiv'+str(i), mmingly)
draw_SVG_line(xmax-txa, tya,
xmax-txb,tyb,
self.options.subsubdivs_th,
'MajorZDiv'+str(l), mminglz)
if com_subdiv==1:
com_subdiv=0
draw_SVG_line(txa, tya,
txb,tyb,
self.options.subdivs_th,
'MajorYDiv'+str(i), mingly)
draw_SVG_line(xmax-txa, tya,
xmax-txb,tyb,
self.options.subdivs_th,
'MajorZDiv'+str(l), minglz)
if com_div==1:
com_div=0
draw_SVG_line(txa, tya,
txb,tyb,
self.options.divs_th,
'MajorYDiv'+str(i), majgly)
draw_SVG_line(xmax-txa, tya,
xmax-txb,tyb,
self.options.divs_th,
'MajorZDiv'+str(l), majglz)
if ((2*l)-1)> (2*nb_ligne_x):
txa=xmax
tya=ymax-(taille)/(2*0.866025)-(taille*((l-1-((2*nb_ligne_x)/2)))/(0.866025))
txb=0
tyb=ymax-(taille)/(2*0.866025)-(taille*((l-1))/(0.866025))
if tyb<=0:
txa=xmax
tya=ymax-(taille)/(2*0.866025)-(taille*((l-1-((2*nb_ligne_x)/2)))/(0.866025))
txb=taille*((2*(l-(2*nb_ligne_y))-1))
tyb=0
if txb<xmax:
if com_subsubdiv==1:
draw_SVG_line(txa, tya,
txb,tyb,
self.options.subsubdivs_th,
'MajorYDiv'+str(i), mmingly)
draw_SVG_line(xmax-txa, tya,
xmax-txb,tyb,
self.options.subsubdivs_th,
'MajorZDiv'+str(l), mminglz)
if com_subdiv==1:
com_subdiv=0
draw_SVG_line(txa, tya,
txb,tyb,
self.options.subdivs_th,
'MajorYDiv'+str(i), mingly)
draw_SVG_line(xmax-txa, tya,
xmax-txb,tyb,
self.options.subdivs_th,
'MajorZDiv'+str(l), minglz)
if com_div==1:
com_div=0
draw_SVG_line(txa, tya,
txb,tyb,
self.options.divs_th,
'MajorYDiv'+str(i), majgly)
draw_SVG_line(xmax-txa, tya,
xmax-txb,tyb,
self.options.divs_th,
'MajorZDiv'+str(l), majglz)
else:
if txb<xmax:
if com_subsubdiv==1:
draw_SVG_line(txa, tya,
txb,tyb,
self.options.subsubdivs_th,
'MajorYDiv'+str(i), mmingly)
draw_SVG_line(xmax-txa, tya,
xmax-txb,tyb,
self.options.subsubdivs_th,
'MajorZDiv'+str(l), mminglz)
if com_subdiv==1:
com_subdiv=0
draw_SVG_line(txa, tya,
txb,tyb,
self.options.subdivs_th,
'MajorYDiv'+str(i), mingly)
draw_SVG_line(xmax-txa, tya,
xmax-txb,tyb,
self.options.subdivs_th,
'MajorZDiv'+str(l), minglz)
if com_div==1:
com_div=0
draw_SVG_line(txa, tya,
txb,tyb,
self.options.divs_th,
'MajorYDiv'+str(i), majgly)
draw_SVG_line(xmax-txa, tya,
xmax-txb,tyb,
self.options.divs_th,
'MajorZDiv'+str(l), majglz)
if __name__ == '__main__':
e = Grid_Polar()
e.affect()
#End of file
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