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mightyscape-1.1-deprecated/extensions/fablabchemnitz/fablabchemnitz_living_hinge3.py

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2020-07-30 01:16:18 +02:00
#!/usr/bin/env python3
"""
A Inkscape extension to generate a pattern that allows to bend wood or MDF one it is laser cut.
"""
import inkex
import math
from lxml import etree
class BendWoodCutsPattern(inkex.Effect):
height = -1.0
def __init__(self):
inkex.Effect.__init__(self)
self.arg_parser.add_argument('--width', type=float, default=10, help='Width (mm)')
self.arg_parser.add_argument('--height', type=float, default=100, help='Height (mm)')
self.arg_parser.add_argument('--horizontalLineSeparation', type=float, default=1, help='Horizontal Line Separation (mm)')
self.arg_parser.add_argument('--verticalLineSeparation', type=float, default=3, help='Vertical Line Separation (mm)')
self.arg_parser.add_argument('--maxLineLength', type=float, default=30, help='Max Line Length (mm)')
self.arg_parser.add_argument('--addInitMarks', default="false", help='Add Init Marks')
self.arg_parser.add_argument('--groupLines', default="false", help='Group Lines')
#draw an SVG line segment between the given (raw) points
def draw_SVG_line(self, x1, y1, x2, y2, parent):
if self.height < 0:
svg = self.document.getroot()
self.height = self.svg.unittouu(svg.attrib['height'])
line_style = { 'stroke-width':self.svg.unittouu(str(0.1)+"mm"), 'stroke':'#000000'}
line_attribs = {'style' : str(inkex.Style(line_style)),
'd' : 'M '+str(x1)+','+str(self.height - y1)+' L '+str(x2)+','+str(self.height - y2)}
line = etree.SubElement(parent, inkex.addNS('path','svg'), line_attribs )
def effect(self):
width = self.options.width
height = self.options.height
horizontalLineSeparation = self.options.horizontalLineSeparation
verticalLineSeparation = self.options.verticalLineSeparation
maxLineLength = self.options.maxLineLength
marks = self.options.addInitMarks == "true"
group = self.options.groupLines == "true"
parent = self.svg.get_current_layer()
if group:
parent = etree.SubElement(parent, 'g')
xLines = int(width / horizontalLineSeparation)
maxLineLength = self.options.maxLineLength
linesPerColumn = int(math.ceil(height / maxLineLength))
ll = height / linesPerColumn
for x in range(0, xLines):
if marks:
self.draw_SVG_line(x * horizontalLineSeparation, -3, x * horizontalLineSeparation, -2, parent)
if x % 2 == 0:
for y in range(0, linesPerColumn):
self.draw_SVG_line(x * horizontalLineSeparation, y * ll + verticalLineSeparation / 2, x * horizontalLineSeparation, (y + 1) * ll - verticalLineSeparation / 2, parent)
else:
for y in range(-1, linesPerColumn):
incy = ll / 2
y0 = y * ll + verticalLineSeparation / 2 + incy
if y0 < 0:
y0 = -1
y1 = (y + 1) * ll - verticalLineSeparation / 2 + incy
if y1 > height:
y1 = height + 1
self.draw_SVG_line(x * horizontalLineSeparation, y0, x * horizontalLineSeparation, y1, parent)
BendWoodCutsPattern().run()