added parabola 2 extension
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extensions/fablabchemnitz/parabola_2/parabola_2.inx
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extensions/fablabchemnitz/parabola_2/parabola_2.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 2</name>
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<id>fablabchemnitz.de.parabola_2</id>
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<param name="length" type="int" min="1" max="10000" gui-text="Side Length:">200</param>
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<param name="segments" type="int" min="5" max="1000" 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="triangle">Triangle</option>
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<option value="square">Square</option>
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<option value="pentagon">Pentagon</option>
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<option value="hexagon">Hexagon</option>
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<option value="septagon">Septagon</option>
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<option value="octagon">Octagon</option>
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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_2.py</command>
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</script>
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</inkscape-extension>
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155
extensions/fablabchemnitz/parabola_2/parabola_2.py
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extensions/fablabchemnitz/parabola_2/parabola_2.py
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#!/usr/bin/env python3
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#
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# 7/9/2021 - v.2.0
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#
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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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# Triangle has 3 sides and the sum of the 3 angles is 180 degrees
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# (sides - 2) * 180
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# This can be 60/60/60 or 90/45/45
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# Square has 4 sides and the sum of 4 angles is 360 degrees
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# (sides - 2) * 180
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# 90/90/90/90
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# Pentagon has 5 sides and the sum of 5 angels is 540 degrees
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# (sides - 2) * 180
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# 108/108/108/108/108
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...
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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 Parabola2(inkex.GenerateExtension):
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container_label = 'Parabola 2'
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def add_arguments(self, pars):
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pars.add_argument("--length", type=int, default=300, help="Side Length")
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pars.add_argument("--segments", type=int, default=10, help="Number of line segments")
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pars.add_argument("--shape", default="square")
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sideopts = [
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(1,2),(1,3),(1,4),(1,5),(1,6),(1,7),(1,8),
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(2,3),(2,4),(2,5),(2,6),(2,7),(2,8),
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(3,4),(3,5),(3,6),(3,7),(3,8),
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(4,5),(4,6),(4,7),(4,8),
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(5,6),(5,7),(5,8),
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(6,7),(6,8),
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(7,8)]
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def generate(self):
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sl = self.options.length
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sc = self.options.segments
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shape = self.options.shape
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cp = self.svg.namedview.center # Center Point
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sp = (cp[0] + (sl / 2), cp[1] + (sl / 2)) # Start Point
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cords = []
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def mapshape(sides, sl, sc, sp):
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exteriorAngle = 360/sides
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movement = sl / sc
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tur.setpos(sp)
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for i in range(sides):
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sidecords = []
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tl = 0 # total length
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while tl < sl:
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sidecords.append(tur.getpos())
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tur.forward(movement)
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tl += movement
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# sidecords.append(tur.getpos())
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tur.right(exteriorAngle)
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cords.append(sidecords)
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return cords
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def mapcross(sl, sc, sp):
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movement = sl / sc
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tur.setpos(sp)
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sidecords = []
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tl = 0
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tur.forward(sl)
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while tl < sl:
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tur.backward(movement)
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sidecords.append(tur.getpos())
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tur.right(90)
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def drawshape(cords):
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tur.setpos(cords[0][0])
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for i in range(len(cords)):
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# tur.pd()
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# tur.setpos(cords[i][-1])
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# tur.pu()
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for side in range(len(cords)):
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for cord in range(len(cords[0])):
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if side == (len(cords) - 1):
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tur.setpos(cords[side][cord])
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tur.pd()
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if cord != (len(cords[0])):
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tur.setpos(cords[0][cord])
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tur.pu()
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else:
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tur.setpos(cords[side][cord])
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tur.pd()
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tur.setpos(cords[side + 1][cord])
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tur.pu()
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tur.pu()
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tur = pturtle.pTurtle()
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tur.pu()
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if shape == "triangle":
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sides = 3
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mapshape(sides, sl, sc, sp)
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drawshape(cords)
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elif shape == "square":
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sides = 4
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mapshape(sides, sl, sc, sp)
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drawshape(cords)
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elif shape == "pentagon":
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sides = 5
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mapshape(sides, sl, sc, sp)
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drawshape(cords)
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elif shape == "hexagon":
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sides = 6
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mapshape(sides, sl, sc, sp)
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drawshape(cords)
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elif shape == "septagon":
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sides = 7
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mapshape(sides, sl, sc, sp)
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drawshape(cords)
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elif shape == "octagon":
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sides = 8
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mapshape(sides, sl, sc, sp)
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drawshape(cords)
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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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return inkex.PathElement(d=tur.getPath(), style=str(style))
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if __name__ == "__main__":
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Parabola2().run()
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