add offset thickness, negative segment marking and segment numbering to
unwind paths
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@ -8,13 +8,12 @@
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<param name="keep_original" type="bool" gui-text="Keep original paths" gui-description="If not selected, the original paths get deleted">false</param>
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<param name="break_apart" type="bool" gui-text="Break apart paths" gui-description="Split each path into single curve segments">false</param>
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<param name="break_only" type="bool" gui-text="Break apart paths only" gui-description="No unwinding at all">false</param>
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<label appearance="header">Color Style</label>
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<label appearance="header">Color And Style</label>
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<param name="colorize" type="bool" gui-text="Colorize" gui-description="Colorize original paths and glue pairs">false</param>
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<param name="color_increment" type="int" min="1" max="255" gui-text="Color increment" gui-description="For each segment we count up n colors. Does not apply if 'Randomize colors' is enabled.">10000</param>
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<param name="randomize_colors" type="bool" gui-text="Randomize colors">false</param>
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<label appearance="header">Extrude Options</label>
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<param name="extrude" type="bool" gui-text="Extrude">false</param>
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<param name="extrude_height" type="float" min="0.000" max="99999.000" precision="3" gui-text="Extrude height">10.000</param>
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<param name="number" type="bool" gui-text="Number segments">false</param>
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<label appearance="header">Offset / Extrude Options</label>
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<param name="unit" gui-text="Unit" type="optiongroup" appearance="combo">
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<option value="mm">mm</option>
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<option value="cm">cm</option>
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@ -22,12 +21,15 @@
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<option value="pt">pt</option>
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<option value="px">px</option>
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</param>
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<param name="thickness_offset" type="float" min="-99999.000" max="99999.000" precision="3" gui-text="Thickness offset +/-" gui-description="Allows to add/subtract extra offset length for each curve segment.">0.000</param>
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<param name="extrude" type="bool" gui-text="Extrude">false</param>
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<param name="extrude_height" type="float" min="0.000" max="99999.000" precision="3" gui-text="Extrude height">10.000</param>
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<param name="render_vertical_dividers" type="bool" gui-text="Render vertical dividers">true</param>
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<param name="render_with_dashes" type="bool" gui-text="Use dash style for dividers">true</param>
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</page>
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<page name="tab_about" gui-text="About">
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<label appearance="header">Unwind Paths</label>
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<label>An extension to wrap off paths to receive horizontal lines or extruded bands. Can be used for paper crafting, analysis and other works. You can also just use it to colorize path segments.</label>
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<label>An extension to wrap off paths to receive horizontal lines or extruded bands. Can be used for paper crafting, analysis and other works. You can also just use it to colorize path segments. Tip: use "Offset Paths" extension to create offset curves which help to create unwindings with correct material thickness.</label>
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<label>2021 / written by Mario Voigt (Stadtfabrikanten e.V. / FabLab Chemnitz)</label>
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<spacer/>
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<label appearance="header">Online Documentation</label>
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@ -25,7 +25,8 @@ ToDos:
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"""
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import copy
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import inkex
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from inkex import Color, bezier, Path, CubicSuperPath
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from inkex import Color, bezier, Path, CubicSuperPath, TextElement, Tspan
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from inkex.bezier import csplength
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from lxml import etree
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import math
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import random
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@ -45,9 +46,11 @@ class UnwindPaths(inkex.EffectExtension):
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pars.add_argument('--colorize', type=inkex.Boolean, default=False, help="Colorize original paths and glue pairs")
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pars.add_argument('--color_increment', type=int, default=10000, help="For each segment we count up n colors. Does not apply if 'Randomize colors' is enabled.")
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pars.add_argument('--randomize_colors', type=inkex.Boolean, default=False, help="Randomize colors")
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pars.add_argument('--number', type=inkex.Boolean, default=False, help="Number segments")
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pars.add_argument('--unit', default="mm")
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pars.add_argument('--thickness_offset', type=float, default=0.000, help="Allows to add/subtract extra offset length for each curve segment.")
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pars.add_argument('--extrude', type=inkex.Boolean, default=False)
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pars.add_argument('--extrude_height', type=float, default=10.000)
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pars.add_argument('--unit', default="mm")
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pars.add_argument('--render_vertical_dividers', type=inkex.Boolean, default=False)
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pars.add_argument('--render_with_dashes', type=inkex.Boolean, default=False)
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@ -97,6 +100,7 @@ class UnwindPaths(inkex.EffectExtension):
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def effect(self):
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shifting = self.svg.unittouu(str(self.options.extrude_height) + self.options.unit)
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to = self.svg.unittouu(str(self.options.thickness_offset) + self.options.unit)
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#some mode handling
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if self.options.colorize is True:
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@ -133,6 +137,9 @@ class UnwindPaths(inkex.EffectExtension):
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for i in range(subCount):
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colorSet.append(Color(self.rgb(0, i+self.options.color_increment, 1*i)))
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slengths, stotal = csplength(csp) #get segment lengths and total length of path in document's internal unit
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#self.msg(stotal) #total length of the path
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for sub in csp:
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#generate new horizontal line data by measuring each segment
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new = []
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@ -154,27 +161,51 @@ class UnwindPaths(inkex.EffectExtension):
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if self.options.extrude is True:
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vlinesGroup = self.svg.get_current_layer().add(inkex.Group(id="vlines-" + element.get('id')))
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elemGroup.append(vlinesGroup)
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if self.options.break_only is False:
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while i <= len(sub) - 1:
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stroke_color = '#000000'
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if self.options.colorize is True and self.options.break_apart is True:
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stroke_color =colorSet[i-1]
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horizontal_line_style = {'stroke':stroke_color,'stroke-width':'1px','fill':'none'}
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horizontal_line_style = {'stroke':stroke_color,'stroke-width':self.svg.unittouu('1px'),'fill':'none'}
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length = bezier.cspseglength(new[-1][-1], sub[i]) #sub path length
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length = bezier.cspseglength(new[-1][-1], sub[i]) + to #sub path length
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#if length <= 0:
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# inkex.utils.debug("Warning: path id={}, segment={} might overlap with previous and/or next segment. Maybe check for negative thickness offset.".format(element.get('id'), i))
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segment = "h {:0.6f} ".format(length)
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topPathData += segment
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bottomPathData += segment
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new[-1].append(sub[i]) #important line!
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mid_coord_x = xmin + sum([length for length in lengths]) + length/2
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font_size = 5
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font_y_offset = font_size + 1
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if self.options.number is True:
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text = topLineGroup.add(TextElement(id=element.get('id') + "_TextNr{}".format(i)))
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text.set("x", "{:0.6f}".format(mid_coord_x))
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text.set("y", "{:0.6f}".format(ymax - font_y_offset))
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text.set("font-size", "{:0.6f}".format(font_size))
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text.set("style", "text-anchor:middle;text-align:center;fill:{}".format(stroke_color))
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tspan = text.add(Tspan(id=element.get('id') + "_TSpanNr{}".format(i)))
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tspan.set("x", "{:0.6f}".format(mid_coord_x))
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if length <= 0:
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tspan.set("y", "{:0.6f}".format(ymax - font_y_offset - i))
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else:
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tspan.set("y", "{:0.6f}".format(ymax - font_y_offset))
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tspan.text = str(i)
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if self.options.break_apart is True:
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self.drawline("m {:0.6f},{:0.0f} ".format(xmin + sum([length for length in lengths]), ymax) + segment,
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self.drawline("m {:0.6f},{:0.6f} ".format(xmin + sum([length for length in lengths]), ymax) + segment,
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"segmented-top-{}-{}".format(element.get('id'), i), topLineGroup, horizontal_line_style)
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if length <= 0:
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self.drawline("m {:0.6f},{:0.6f} ".format(mid_coord_x, ymax) + "v {} ".format(-5-i),
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"segmented-top-overlap-{}-{}".format(element.get('id'), i), topLineGroup, horizontal_line_style)
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if self.options.extrude is True:
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self.drawline("m {:0.6f},{:0.0f} ".format(xmin + sum([length for length in lengths]), ymax + shifting) + segment,
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"segmented-bottom-{}-{}".format(element.get('id'), i), bottomLineGroup, horizontal_line_style)
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self.drawline("m {:0.6f},{:0.6f} ".format(xmin + sum([length for length in lengths]), ymax + shifting) + segment,
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"segmented-bottom-{}-{}".format(element.get('id'), i), bottomLineGroup, horizontal_line_style)
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lengths.append(length)
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i += 1
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@ -184,15 +215,15 @@ class UnwindPaths(inkex.EffectExtension):
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self.drawline(bottomPathData, "combined-bottom-{0}".format(element.get('id')), elemGroup, horizontal_line_style)
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#draw as much vertical lines as segments in bezier + start + end vertical line
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vertical_end_lines_style = {'stroke':'#000000','stroke-width':'1px','fill':'none'}
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vertical_end_lines_style = {'stroke':'#000000','stroke-width':self.svg.unittouu('1px'),'fill':'none'}
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if self.options.extrude is True:
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#render start line
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self.drawline("m {:0.6f},{:0.6f} v {:0.6f}".format(xmin, ymax, shifting),"vline-{}-start".format(element.get('id')), vlinesGroup, vertical_end_lines_style)
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#render divider lines
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if self.options.render_vertical_dividers is True:
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vertical_mid_lines_style = {'stroke':'#000000','stroke-width':'1px','fill':'none'}
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vertical_mid_lines_style = {'stroke':'#000000','stroke-width':self.svg.unittouu('1px'),'fill':'none'}
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if self.options.render_with_dashes is True:
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vertical_mid_lines_style = {'stroke':'#000000','stroke-width':'1px',"stroke-dasharray":"2 2", 'fill':'none'}
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vertical_mid_lines_style = {'stroke':'#000000','stroke-width':self.svg.unittouu('1px'),"stroke-dasharray":"2 2", 'fill':'none'}
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x = 0
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for n in range(0, i-2):
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x += lengths[n]
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@ -227,7 +258,7 @@ class UnwindPaths(inkex.EffectExtension):
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stroke_color = '#000000'
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if self.options.colorize is True:
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stroke_color =colorSet[i-1]
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new_original_line_style = {'stroke':stroke_color,'stroke-width':'1px','fill':'none'}
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new_original_line_style = {'stroke':stroke_color,'stroke-width':self.svg.unittouu('1px'),'fill':'none'}
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self.drawline(d, "segmented-" + element.get('id'), newOriginalPathGroup, new_original_line_style)
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if self.options.keep_original is False:
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