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mightyscape-1.1-deprecated/extensions/fablabchemnitz/bobbinlace/lace_grid.py

107 lines
4.3 KiB
Python

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