added polygon side extension
This commit is contained in:
parent
5d90d4f2ed
commit
c6c21981d0
22
extensions/fablabchemnitz/polygon_side/polygon_side.inx
Executable file
22
extensions/fablabchemnitz/polygon_side/polygon_side.inx
Executable file
@ -0,0 +1,22 @@
|
|||||||
|
<?xml version="1.0" encoding="UTF-8"?>
|
||||||
|
<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
|
||||||
|
<name>Polygon Side</name>
|
||||||
|
<id>fablabchemnitz.de.polygon_side</id>
|
||||||
|
<param name="number_of_sides" type="int" min="1" max="100" gui-text="Number of Sides">3</param>
|
||||||
|
<param name="length_of_sides" type="float" min="0.01" max="9999" gui-text="Length of Sides">25</param>
|
||||||
|
<param name="unit_choice" type="optiongroup" appearance="radio" gui-text="Units">
|
||||||
|
<option value="1">User</option>
|
||||||
|
<option value="2">Pixels</option>
|
||||||
|
</param>
|
||||||
|
<effect>
|
||||||
|
<object-type>path</object-type>
|
||||||
|
<effects-menu>
|
||||||
|
<submenu name="FabLab Chemnitz">
|
||||||
|
<submenu name="Shape/Pattern from Generator"/>
|
||||||
|
</submenu>
|
||||||
|
</effects-menu>
|
||||||
|
</effect>
|
||||||
|
<script>
|
||||||
|
<command location="inx" interpreter="python">polygon_side.py</command>
|
||||||
|
</script>
|
||||||
|
</inkscape-extension>
|
||||||
118
extensions/fablabchemnitz/polygon_side/polygon_side.py
Normal file
118
extensions/fablabchemnitz/polygon_side/polygon_side.py
Normal file
@ -0,0 +1,118 @@
|
|||||||
|
#!/usr/bin/env python3
|
||||||
|
#
|
||||||
|
# Copyright (C) [2021] [Matt Cottam], [mpcottam@raincloud.co.uk]
|
||||||
|
#
|
||||||
|
# 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.
|
||||||
|
#
|
||||||
|
#
|
||||||
|
# Create a Polygon given a number of sides and side length.
|
||||||
|
#
|
||||||
|
|
||||||
|
import math
|
||||||
|
import inkex
|
||||||
|
from inkex import PathElement
|
||||||
|
from inkex import units
|
||||||
|
import re
|
||||||
|
|
||||||
|
# Formula to find the circumradius ( centre to apex ) required to create
|
||||||
|
# for a given number of sectors to return desired side length
|
||||||
|
|
||||||
|
def radius_from_side_and_sectors(side_length, sectors, found_units, unit_choice):
|
||||||
|
conversions = {
|
||||||
|
'in': 96.0,
|
||||||
|
'pt': 1.3333333333333333,
|
||||||
|
'px': 1.0,
|
||||||
|
'mm': 3.779527559055118,
|
||||||
|
'cm': 37.79527559055118,
|
||||||
|
'm': 3779.527559055118,
|
||||||
|
'km': 3779527.559055118,
|
||||||
|
'Q': 0.94488188976378,
|
||||||
|
'pc': 16.0,
|
||||||
|
'yd': 3456.0,
|
||||||
|
'ft': 1152.0,
|
||||||
|
'': 1.0, # Default px
|
||||||
|
}
|
||||||
|
|
||||||
|
# Try to convert from detected units into pixels
|
||||||
|
|
||||||
|
if unit_choice == 2:
|
||||||
|
try:
|
||||||
|
pixel_conversion_factor = conversions[found_units]
|
||||||
|
except:
|
||||||
|
pixel_conversion_factor = 1
|
||||||
|
|
||||||
|
else:
|
||||||
|
pixel_conversion_factor = 1
|
||||||
|
|
||||||
|
radius = (side_length / (2 * (math.sin(math.pi / sectors)))) / pixel_conversion_factor
|
||||||
|
|
||||||
|
path = svg_poly(0, 0, radius, sectors)
|
||||||
|
|
||||||
|
return path
|
||||||
|
|
||||||
|
|
||||||
|
# All points of a regular polygon lie on a circle
|
||||||
|
# Calculate points on circle for given number of sides
|
||||||
|
|
||||||
|
def svg_poly(cx, cy, radius, sectors):
|
||||||
|
x_start = cx
|
||||||
|
y_start = cy - radius
|
||||||
|
|
||||||
|
angle = 0
|
||||||
|
|
||||||
|
y_start = cy / 2 + (radius * (math.sin(angle)))
|
||||||
|
x_start = cx / 2 + (radius * (math.cos(angle)))
|
||||||
|
|
||||||
|
path = f'M {x_start} {y_start}'
|
||||||
|
|
||||||
|
for sector in range(1, sectors + 1):
|
||||||
|
angle = (sector * math.pi) / (sectors / 2)
|
||||||
|
|
||||||
|
y = cy / 2 + (radius * (math.sin(angle)))
|
||||||
|
x = cx / 2 + (radius * (math.cos(angle)))
|
||||||
|
|
||||||
|
path = path + f' L {x} {y} '
|
||||||
|
|
||||||
|
x_start = x
|
||||||
|
y_start = y
|
||||||
|
|
||||||
|
return path + ' z'
|
||||||
|
|
||||||
|
|
||||||
|
class makepoly(inkex.GenerateExtension):
|
||||||
|
|
||||||
|
def add_arguments(self, pars):
|
||||||
|
pars.add_argument("--number_of_sides", type=int, dest="sectors", default=6)
|
||||||
|
pars.add_argument("--length_of_sides", type=float, dest="side_length", default=25)
|
||||||
|
pars.add_argument("--unit_choice", type=int, dest="unit_choice", default=25)
|
||||||
|
|
||||||
|
container_label = 'Side Poly'
|
||||||
|
|
||||||
|
def generate(self):
|
||||||
|
found_units = self.svg.unit
|
||||||
|
|
||||||
|
path = radius_from_side_and_sectors(self.options.side_length, self.options.sectors, found_units,
|
||||||
|
self.options.unit_choice)
|
||||||
|
|
||||||
|
style = {'stroke': '#000000', 'fill': 'none', 'stroke-width': str(self.svg.unittouu('1px'))}
|
||||||
|
poly_path = PathElement()
|
||||||
|
poly_path.style = style
|
||||||
|
poly_path.path = path
|
||||||
|
|
||||||
|
yield poly_path
|
||||||
|
|
||||||
|
|
||||||
|
if __name__ == '__main__':
|
||||||
|
makepoly().run()
|
||||||
Reference in New Issue
Block a user