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