2020-07-30 01:16:18 +02:00
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#!/usr/bin/env python3
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'''
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Copyright (C) 2013 Matthew Dockrey (gfish @ cyphertext.net)
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Based on http://arc.id.au/GearDrawing.html by Dr A.R.Collins
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And on the original gears.py by Aaron Spike and Tavmjong Bah
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'''
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import inkex
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from math import *
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from lxml import etree
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from fablabchemnitz_involute import *
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class Gears(inkex.Effect):
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def __init__(self):
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inkex.Effect.__init__(self)
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self.arg_parser.add_argument("--tab", default="Options", help="The tab selected when OK was pressed")
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self.arg_parser.add_argument("-t", "--teeth", type=int, default=24, help="Number of teeth")
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self.arg_parser.add_argument("-p", "--pressure_angle", type=float, default="20", help="Pressure angle")
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self.arg_parser.add_argument("-y", "--size_type", type=int, default="1", help="Size type (1 = module (mm), 2 = pitch diameter (inches), 3 = diametral pitch (inches)")
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self.arg_parser.add_argument("-s", "--size", type=float, default="5", help="Size")
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self.arg_parser.add_argument("-o", "--orientation", type=int, default="1", help="Gear orientation")
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def effect(self):
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Z = self.options.teeth
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phi = self.options.pressure_angle
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size_type = self.options.size_type
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size = self.options.size
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orientation = self.options.orientation
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# Convert size to module (mm) if needed
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if (size_type == 2):
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# Pitch diameter
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size = 25.4 * size / Z
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elif (size_type == 3):
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# Diametral pitch
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size = 25.4 / size
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m = self.svg.unittouu(str(size) + "mm")
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if (orientation == 2):
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svg = CreateInternalGear(m, Z, phi)
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else:
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svg = CreateExternalGear(m, Z, phi)
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# Insert as a new element
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gear_style = { 'stroke': '#000000',
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'stroke-width': self.svg.unittouu(str(0.1) + "mm"),
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'fill': 'none'
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}
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g_attribs = {inkex.addNS('label','inkscape'): 'Gear ' + str(Z),
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'transform': 'translate(' + str( self.svg.namedview.center[0] ) + ',' + str( self.svg.namedview.center[1] ) + ')',
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'style' : str(inkex.Style(gear_style)),
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'd' : svg }
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g = etree.SubElement(self.svg.get_current_layer(), inkex.addNS('path','svg'), g_attribs)
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2020-08-23 21:09:57 +02:00
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Gears().run()
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