Added parabola extension
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extensions/fablabchemnitz/parabola.inx
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extensions/fablabchemnitz/parabola.inx
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<?xml version="1.0" encoding="UTF-8"?>
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<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
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<name>Parabola</name>
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<id>fablabchemnitz.de.parabola</id>
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<param name="tab" type="notebook">
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<page name="common" gui-text="Basic Options">
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<param name="height" type="int" min="100" max="1000" gui-text="Shape Height:">120</param>
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<param name="width" type="int" min="100" max="1000" gui-text="Shape Width:">120</param>
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<param name="seg_count" type="int" min="5" max="100" gui-text="Number of Line Segments:">25</param>
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<param name="shape" type="optiongroup" appearance="combo" gui-text="Choose a Shape:">
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<option value="cross">Cross</option>
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<option value="square">Square</option>
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<option value="triangle">Triangle</option></param>
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<label> </label>
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<label> </label>
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<label>v1.1.0</label>
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</page>
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<page name="corners" gui-text="Corners">
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<param name="c1" type="bool" gui-text="Corner 1">true</param>
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<param name="c2" type="bool" gui-text="Corner 2">true</param>
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<param name="c3" type="bool" gui-text="Corner 3">true</param>
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<param name="c4" type="bool" gui-text="Corner 4 *">true</param>
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<label>* Corner 4 doesn't apply to the Triangle Shape</label>
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</page>
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</param>
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<effect>
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<object-type>all</object-type>
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<effects-menu>
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<submenu name="FabLab Chemnitz">
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<submenu name="Shape/Pattern from Generator"/>
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</submenu>
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</effects-menu>
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</effect>
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<script>
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<command location="inx" interpreter="python">parabola.py</command>
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</script>
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</inkscape-extension>
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240
extensions/fablabchemnitz/parabola.py
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extensions/fablabchemnitz/parabola.py
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#!/usr/bin/env python3
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# coding=utf-8
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#
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# 2/27/2021 - v.1.1.0
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# Copyright (C) 2021 Reginald Waters opensourcebear@nthebare.com
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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"""
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This extension renders a wireframe shape and then draws lines to form a parabola
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shape.
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The height and width are independently variable. The number of lines will change
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the density of the end product.
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"""
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import inkex
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from inkex import turtle as pturtle
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class parabola(inkex.GenerateExtension):
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container_label = 'Parabola'
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def add_arguments(self, pars):
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pars.add_argument("--height", type=int, default=300, help="Shape Height")
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pars.add_argument("--width", type=int, default=300, help="Shape Width")
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pars.add_argument("--seg_count", type=int, default=10, help="Number of line segments")
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pars.add_argument("--shape", default="square")
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pars.add_argument("--tab", default="common")
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pars.add_argument("--c1", default="true")
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pars.add_argument("--c2", default="false")
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pars.add_argument("--c3", default="false")
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pars.add_argument("--c4", default="false")
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def generate(self):
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# Let's simplify the variable names
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ht = int(self.options.height)
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wt = int(self.options.width)
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sc = int(self.options.seg_count)
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shape = self.options.shape
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c1 = self.options.c1
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c2 = self.options.c2
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c3 = self.options.c3
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c4 = self.options.c4
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point = self.svg.namedview.center
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style = inkex.Style({
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'stroke-linejoin': 'miter', 'stroke-width': str(self.svg.unittouu('1px')),
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'stroke-opacity': '1.0', 'fill-opacity': '1.0',
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'stroke': '#000000', 'stroke-linecap': 'butt',
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'fill': 'none'
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})
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# Setting the amount to move across the horizontal and vertical
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increaseht = (ht / sc)
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increasewt = (wt / sc)
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tur = pturtle.pTurtle()
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tur.pu() # Pen up
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tur.setpos(point) # start in the center
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if shape == "cross":
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# We draw the cross shape and store the 4 points
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# Can this be looped?
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# Should I store the coordinates in an array/list?
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tur.forward((ht / 2))
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toppoint = tur.getpos()
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if c3 == 'true' or c4 == 'true':
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tur.pd()
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tur.backward((ht / 2))
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tur.pu()
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if c1 == 'true' or c2 == 'true':
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tur.pd()
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tur.backward((ht / 2))
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bottompoint = tur.getpos()
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tur.pu()
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tur.setpos(point)
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tur.right(90)
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tur.forward((wt / 2))
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rightpoint = tur.getpos()
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if c3 == 'true' or c2 == 'true':
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tur.pd()
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tur.backward((wt / 2))
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tur.pu()
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if c1 == 'true' or c4 == 'true':
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tur.pd()
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tur.backward((wt / 2))
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leftpoint = tur.getpos()
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while sc > 0:
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if c1 == 'true':
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# Drawing the SE Corner based on SW coordinates
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# We always draw this corner
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tur.pu()
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tur.setpos((bottompoint[0], bottompoint[1] - ( (increaseht / 2) * sc ) ))
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tur.pd()
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tur.setpos((bottompoint[0] + ( (increasewt / 2) * sc ), bottompoint[1] - (ht / 2) ))
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if c2 == 'true': # Drawing the SW Corner based on SE Coordinates
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tur.pu()
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tur.setpos((bottompoint[0], bottompoint[1] - ( (increaseht / 2) * sc ) ))
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tur.pd()
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tur.setpos((bottompoint[0] - ( (increasewt / 2) * sc ), bottompoint[1] - (ht / 2) ))
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if c3 == 'true': # Drawing the NW Corner based on NE Coordinates
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tur.pu()
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tur.setpos((toppoint[0], toppoint[1] + ( (increaseht / 2) * sc ) ))
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tur.pd()
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tur.setpos((toppoint[0] - ( (increasewt / 2) * sc ), toppoint[1] + (ht / 2) ))
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if c4 == 'true': # Drawing the NE Corner based on NW Coordinates
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tur.pu()
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tur.setpos((toppoint[0], toppoint[1] + ( (increaseht / 2) * sc ) ))
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tur.pd()
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tur.setpos((toppoint[0] + ( (increasewt / 2) * sc ), toppoint[1] + (ht / 2) ))
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sc = sc - 1
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if shape == "triangle":
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# We draw the triangle and store the 3 corner points
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# Loopable?
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tur.backward((ht / 2))
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tur.right(90)
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tur.forward((wt /2))
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cornera = tur.getpos()
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if c3 == 'true' or c2 == 'true':
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tur.pd()
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tur.backward((wt))
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cornerb = tur.getpos()
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tur.pu()
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if c2 == 'true' or c1 == 'true':
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tur.pd()
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tur.setpos((point[0], (cornera[1] - ht) ))
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cornerc = tur.getpos()
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tur.pu()
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if c1 == 'true' or c3 == 'true':
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tur.pd()
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tur.setpos(cornera)
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# So.. The math below took a lot of trial and error to figure out...
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# I probably need to take some geography classes...
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while sc > 0:
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if c1 == 'true':
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tur.pu()
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tur.setpos(( (cornerb[0] + ((increasewt / 2) * (sc)) - (wt / 2)), cornerb[1] + (increaseht * sc) - ht ))
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tur.pd()
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tur.setpos(( (cornera[0] + (increasewt / 2) * (sc)), cornera[1] - (increaseht * sc) ))
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if c2 == 'true':
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tur.pu()
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tur.setpos((cornerb[0] - (increasewt * sc ) , cornerb[1] ))
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tur.pd()
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tur.setpos(( (cornerb[0] + ((increasewt / 2) * sc) - (wt / 2)), cornerb[1] + (increaseht * sc) - ht ))
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if c3 == 'true':
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tur.pu()
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tur.setpos((cornera[0] + (increasewt * sc ) , cornera[1] ))
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tur.pd()
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tur.setpos(( (cornera[0] - ((increasewt / 2) * sc) + (wt / 2)), cornera[1] + (increaseht * sc) - ht ))
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sc = sc - 1
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if shape == "square":
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# We draw out the square shape and store the coordinates for each corner
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# Can this be looped?
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tur.right(90)
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tur.forward((wt / 2))
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tur.right(90)
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tur.forward((ht / 2))
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swcorner = tur.getpos()
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if c4 == 'true' or c3 == 'true': # We only draw the 2 lines that are part of these corners
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tur.pd() # Pen Down
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tur.right(90)
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tur.forward(wt)
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secorner = tur.getpos()
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tur.pu()
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if c3 == 'true' or c2 == 'true': # We only draw the 2 lines that are part of these corners
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tur.pd()
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tur.right(90)
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tur.forward(ht)
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necorner = tur.getpos()
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tur.pu()
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if c1 == 'true' or c2 == 'true': # We only draw the 2 lines that are part of these corners
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tur.pd()
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tur.right(90)
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tur.forward(wt)
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nwcorner = tur.getpos()
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tur.right(90)
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tur.pu()
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if c4 == 'true' or c1 == 'true': # We only draw the 2 lines that are part of these corners
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tur.pd()
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tur.forward(ht)
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while sc > 0:
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if c1 == 'true':
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# Drawing the NW Corner based on SW coordinates
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# We always draw this corner
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tur.pu()
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tur.setpos((swcorner[0], swcorner[1] - ( increaseht * sc ) ))
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tur.pd()
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tur.setpos((swcorner[0] + ( increasewt * sc ), swcorner[1] - ht))
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if c2 == 'true': # Drawing the NE Corner based on SE Coordinates
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tur.pu()
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tur.setpos((secorner[0], secorner[1] - ( increaseht * sc ) ))
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tur.pd()
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tur.setpos((secorner[0] - ( increasewt * sc ), secorner[1] - ht))
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if c3 == 'true': # Drawing the SE Corner based on NE Coordinates
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tur.pu()
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tur.setpos((necorner[0], necorner[1] + ( increaseht * sc ) ))
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tur.pd()
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tur.setpos((necorner[0] - ( increasewt * sc ), necorner[1] + ht))
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if c4 == 'true': # Drawing the SW Corner based on NW Coordinates
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tur.pu()
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tur.setpos((nwcorner[0], nwcorner[1] + ( increaseht * sc ) ))
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tur.pd()
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tur.setpos((nwcorner[0] + ( increasewt * sc ), nwcorner[1] + ht))
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sc = sc - 1
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return inkex.PathElement(d=tur.getPath(), style=str(style))
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if __name__ == "__main__":
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# execute only if run as a script
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parabola().run()
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