72 lines
2.4 KiB
Python
72 lines
2.4 KiB
Python
# (c) 2014 David Douard <david.douard@gmail.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 Lesser General Public License (LGPL)
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# as published by the Free Software Foundation; either version 2 of
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# the License, or (at your option) any later version.
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# for detail see the LICENCE text file.
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#
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# FCGear 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 Library General Public License for more details.
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#
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# You should have received a copy of the GNU Library General Public
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# License along with FCGear; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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import itertools
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from math import cos, sin
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from involute import CreateExternalGear, rotate
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def makeGear(m, Z, angle):
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w = SVGWireBuilder()
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CreateExternalGear(w, m, Z, angle)
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return '\n'.join(w.svg)
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class SVGWireBuilder(object):
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def __init__(self):
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self.theta = 0.0
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self.pos = None
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self.svg = []
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def move(self, p):
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p = rotate(p, self.theta)
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self.svg.append('M %s,%s' % (p[0], p[1]))
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self.pos = p
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def line(self, p):
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p = rotate(p, self.theta)
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self.svg.append('L %s,%s' % (p[0], p[1]))
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self.pos = p
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def arc(self, p, r, sweep):
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p = rotate(p, self.theta)
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self.svg.append('A %s,%s 0,0,%s %s,%s' % (r, r, str(sweep), p[0], p[1]))
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self.pos = p
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def curve(self, *points):
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"""Add a Bezier curve from self.pos to points[-1]
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every other points are the control points of the Bezier curve (which
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will thus be of degree len(points) )
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"""
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assert len(points) == 3
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points = [rotate(p, self.theta) for p in points]
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self.svg.append('C %s,%s %s,%s %s,%s' % tuple(itertools.chain(*points)))
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self.pos = points[-1]
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def close(self):
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self.svg.append('Z')
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if __name__ == '__main__':
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from optparse import OptionParser
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p = OptionParser()
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p.add_option('-a', '--angle', help='pressure angle',
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dest='angle', default=20)
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opts, args = p.parse_args()
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if len(args) != 2:
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p.error()
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m, Z = [float(v) for v in args]
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print(makeGear(m, int(Z), float(opts.angle)))
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