vmario89
commented
4 years ago Hi, i made this work with small modifications for InkScape 0.92.4
#!/usr/bin/python
#
# Copyright (C) 2016 Kie Brooks
# Distributed under GPLv3 or later.
# draw_ratchet
# version 0.1
#
# This file is part of draw_ratchet
#
# draw_ratchet 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 3 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, see <http://www.gnu.org/licenses/>.
#
#
# description :
# draw ratchet gears to arbitrary sizes and precision
#
# I am not an engineer, I am sure this little program could be improved or made much more complex,
# it may contain horrible flaws but it fills my current need and should be easy to improve on.
# Alternatively pay me some money and I might do it for you ;P
#
# This program is used by inkscape.
# It can be found in the menu : extensions -> render -> ratchet
# see file draw_ratch.inx
# (directory ~/.config/inkscape/extensions/)
import inkex, simplestyle
import math
Line_style = { 'stroke' : '#000000',
'stroke-width' : '0.5px',
'fill' : 'none' }
### SVG shape helpers
def draw_SVG_circle(parent, r, cx, cy, name, style):
" structure an SVG circle entity under parent "
circ_attribs = {'style': simplestyle.formatStyle(style),
'cx': str(cx), 'cy': str(cy),
'r': str(r),
inkex.addNS('label','inkscape'): name}
circle = inkex.etree.SubElement(parent, inkex.addNS('circle','svg'), circ_attribs )
###
class Ratchet(inkex.Effect):
def __init__(self):
inkex.Effect.__init__(self)
self.OptionParser.add_option("--centre_hole", action="store", type='inkbool',
dest="centre_hole", default=True, help="Show or not")
self.OptionParser.add_option("--teeth", action="store", type="int",
dest="teeth", default=12, help="Number of teeth around outside")
self.OptionParser.add_option("--centre_hole_diam", action="store", type="float",
dest="centre_hole_diam", default=1, help="Dia of central hole")
self.OptionParser.add_option("--diam_in", action="store", type="float",
dest="diam_in", default=28, help="Inner diamter of the Ratchet")
self.OptionParser.add_option("--diam_out", action="store", type="float",
dest="diam_out", default=30, help="Outer diamter of the Ratchet")
self.OptionParser.add_option('--vtooth_shape', action='store', type='string',
dest='vtooth_shape', default='straight', help="Shape of tooth")
self.OptionParser.add_option('--htooth_shape', action='store', type='string',
dest='htooth_shape', default='curve', help="Shape of tooth")
def effect(self):
# sort out the options
teeth = self.options.teeth
diam_in = self.options.diam_in
diam_out = self.options.diam_out
vtooth_shape = self.options.vtooth_shape
htooth_shape = self.options.htooth_shape
# Create group center of view
t = 'translate(%s,%s)' % (self.view_center[0], self.view_center[1])
grp_attribs = {inkex.addNS('label','inkscape'):'Ratchet', 'transform':t}
grp = inkex.etree.SubElement(self.current_layer, 'g', grp_attribs)
#
# Central hole (at origin)
if self.options.centre_hole:
draw_SVG_circle(grp, self.options.centre_hole_diam, 0,0, 'Central_hole', Line_style)
#Polygon drawing
# <path d="M50,50 A30,50 0 0,1 100,100"
# style="stroke:#660000; fill:none;"/>
# L - line : x posn, y posn
# A - arc : radius x, radius y, x-axis rotation, large arc flag, sweep flag
# Points on the ratchet
# b
# |\
# | \ |\
# \ | \ | \
# \ | \| \
# a c \
path = "M%s %s " %(diam_in,0)
for i in range(teeth):
angle = math.radians(i * 360/ teeth)
x_a = diam_in * math.cos(angle)
y_a = diam_in * math.sin(angle)
x_b = diam_out * math.cos(angle)
y_b = diam_out * math.sin(angle)
if vtooth_shape == "straight":
path += ' L %s %s ' %(x_b, y_b)
else:
path += " A %s,%s 0 0 0 %s %s" % (diam_in, diam_in, x_b, y_b)
#
angle_next = math.radians((i+1) * 360 / teeth)
x_c = diam_in * math.cos(angle_next)
y_c = diam_in * math.sin(angle_next)
if htooth_shape == "straight":
path += ' L %s %s ' %(x_c, y_c)
else: # Arc
path += " A %s,%s 0 0 1 %s %s" % (diam_in, diam_in, x_c, y_c)
# close path
path += 'z'
# draw it
line_attribs = {'style' : simplestyle.formatStyle(Line_style), inkex.addNS('label','inkscape') : 'Cone' }
line_attribs['d'] = path
inkex.etree.SubElement(grp, inkex.addNS('path','svg'), line_attribs )
effect = Ratchet()
effect.affect() <?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright (C) 2016 Kie Brooks
Distributed under GPLv3 or later
This file is part of draw_ratchet
version 0.1
draw_ratchet 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 3 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, see <http://www.gnu.org/licenses/>.
-->
<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
<_name>Ratchet</_name>
<id>ratchet</id>
<dependency type="executable" location="extensions">eridur-ratchet.py</dependency>
<param name="teeth" type="int" min="2" max="300" _gui-text="Number of teeth">12</param>
<param name="centre_hole" type="boolean" _gui-text="Centre hole">true</param>
<param name="centre_hole_diam" type="float" precision="3" min="0" max="50" _gui-text="Centre hole size">1.000</param>
<param name="diam_in" type="float" precision="3" min="0" max="200" _gui-text="Outside diameter">30.000</param>
<param name="diam_out" type="float" precision="3" min="0" max="200" _gui-text="Inside diameter">28.000</param>
<param name="vtooth_shape" type="optiongroup" _gui-text="Vertical tooth line:">
<option value="straight">straight</option>
<option value="curve">curve</option>
</param>
<param name="htooth_shape" type="optiongroup" _gui-text="Horizontal tooth line:">
<option value="straight">straight</option>
<option value="curve">curve</option>
</param>
<_param name="header_description" type="description" appearance="header">Author / License</_param>
<_param name="some_description" type="description" xml:space="preserve"> written by Kie (inkscape@kitamura-studios.com)
Draw Ratchet Copyright (C) 2016 Kie Brooks
Distributed under GPLv3 or later
This is a simple extension to save time drawing ratchets.
</_param>
<!-- classify which menu it appears under - can be new name -->
<effect>
<object-type>path</object-type>
<effects-menu>
<submenu _name="eridur Generators" />
<!-- which menu under Extensions -->
</effects-menu>
</effect>
<script>
<command reldir="extensions" interpreter="python">eridur-ratchet.py</command>
</script>
</inkscape-extension>
Neon22
just in case someone doesn't have perl. I thought I'd contribute a python version. Cheers.
To get the inx file adjusted you could change the following (I uses for < substitution): ''' dependency type="executable" location="extensions">draw_ratchet.py effect needs-live-preview="true"> object-type>path __command reldir="extensions" interpreter="python">draw_ratchet.py '''