108 lines
4.5 KiB
Python
108 lines
4.5 KiB
Python
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#!/usr/bin/env python3
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# Copyright (c) 2017, Veronika Irvine
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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from math import sin, cos, radians, ceil
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import inkex
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from lxml import etree
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__author__ = 'Veronika Irvine'
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__credits__ = ['Ben Connors', 'Veronika Irvine', 'Mark Shafer']
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__license__ = 'Simplified BSD'
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class LaceGrid(inkex.Effect):
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def circle(self, x, y, r, fill):
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# define the stroke style
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s = {'fill': fill}
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# create attributes from style and define path
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attribs = {'style':str(inkex.Style(s)),
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'cx':str(x),
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'cy':str(y),
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'r':str(r)}
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# insert path object into current layer
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etree.SubElement(self.svg.get_current_layer(), inkex.addNS('circle', 'svg'), attribs)
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def drawDot(self, x, y):
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self.circle(x, y, self.options.dotwidth, self.options.dotcolor)
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def draw(self):
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a = self.options.distance
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theta = self.options.angle
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hgrid = a*sin(theta);
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vgrid = a*cos(theta)
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rows = int(ceil(self.options.height / vgrid))
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cols = int(ceil(self.options.width / hgrid))
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y = 0.0
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for r in range(rows):
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x = 0.0
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if (r % 2 == 1):
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x += hgrid
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for c in range(ceil(cols/2)):
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self.drawDot(x, y)
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x += 2.0*hgrid;
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y += vgrid;
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def __init__(self):
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inkex.Effect.__init__(self)
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self.arg_parser.add_argument('--angle', type=float)
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self.arg_parser.add_argument('--distance', type=float)
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self.arg_parser.add_argument('--pinunits')
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self.arg_parser.add_argument('--width', type=float)
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self.arg_parser.add_argument('--patchunits')
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self.arg_parser.add_argument('--height', type=float)
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self.arg_parser.add_argument('--dotwidth', type=float)
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self.arg_parser.add_argument('--dotunits')
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self.arg_parser.add_argument('--dotcolor', type=inkex.Color)
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def effect(self):
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"""
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Effect behaviour.
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Overrides base class' method and draws something.
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"""
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# Convert user input to universal units
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self.options.width = self.svg.unittouu(str(self.options.width)+self.options.patchunits)
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self.options.height = self.svg.unittouu(str(self.options.height)+self.options.patchunits)
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self.options.distance = self.svg.unittouu(str(self.options.distance)+self.options.pinunits)
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# Convert from diameter to radius
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self.options.dotwidth = self.svg.unittouu(str(self.options.dotwidth)+self.options.dotunits)/2
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# Users expect distance to be the vertical distance between footside pins
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# (vertical distance between every other row) but in the script we use it
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# as as diagonal distance between grid points
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# therefore convert distance based on the angle chosen
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self.options.angle = radians(self.options.angle)
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self.options.distance = self.options.distance/(2.0*cos(self.options.angle))
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# Draw a grid of dots based on user inputs
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self.options.dotcolor = self.options.dotcolor.to_rgb()
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self.draw()
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# Create effect instance and apply it.
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LaceGrid().run()
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