FabLab_Chemnitz/mightyscape-1.1-deprecated
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expanded join paths extension to create dimples/pressfits

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This commit is contained in:
Mario Voigt 2021-10-16 15:48:00 +02:00
parent 6c3966cbd3
commit 9700a2ef34
3 changed files with 177 additions and 12 deletions
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28
extensions/fablabchemnitz/join_paths/join_paths.inx
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@ -1,10 +1,34 @@
<?xml version="1.0" encoding="UTF-8"?>
<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
<name>Join Paths</name>
<name>Join Paths / Create Dimples</name>
<id>fablabchemnitz.de.join_paths</id>
<param name="tab" type="notebook">
<page name="subdividePath" gui-text="Join Paths">
<param name="optimized" type="bool" gui-text="Optimized">true</param>
<param name="optimized" type="bool" gui-text="Optimized joining">true</param>
<label appearance="header">Create Dimples</label>
<label>Enable to insert dimples (pressfit noses) into the gaps (instead regular straight lines)</label>
<param name="add_dimples" type="bool" gui-text="Create dimples">false</param>
<param name="dimple_type" type="optiongroup" appearance="combo" gui-text="Dimple type">
<option value="lines">lines</option>
<option value="arcs">arcs</option>
</param>
<param name="draw_dimple_centers" type="bool" gui-text="Draw dimple centers">false</param>
<param name="dimple_invert" type="bool" gui-text="Invert dimples">false</param>
<param name="draw_both_sides" type="bool" gui-text="Draw both sides">false</param>
<param name="dimple_height_mode" type="optiongroup" appearance="combo" gui-text="Height by">
<option value="by_height">by height</option>
<option value="by_angle">by angle</option>
</param>
<param name="dimple_angle" type="float" min="0.000" max="360.000" precision="3" gui-text="Angle">45.000</param>
<param name="dimple_height" type="float" min="0.001" max="99999.000" precision="3" gui-text="Height">4.000</param>
<param name="dimple_height_units" gui-text="Height units" type="optiongroup" appearance="combo">
<option value="px">px</option>
<option value="pt">pt</option>
<option value="in">in</option>
<option value="cm">cm</option>
<option value="mm">mm</option>
</param>
<param name="dimples_to_group" type="bool" gui-text="Unify into single group">false</param>
</page>
<page name="desc" gui-text="Help">
<label xml:space="preserve">This effect joins the Bezier curves, with straight line segments. If the end nodes are close enough, they are merged into a single one. With the optimized option selected, the new curve starts from the top most curve from the selection. The curves are then joined based on the distance of their closest end point to the previous curve.

159
extensions/fablabchemnitz/join_paths/join_paths.py
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@ -24,7 +24,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
import inkex
from inkex.paths import CubicSuperPath
import sys
import copy
import math
def floatCmpWithMargin(float1, float2, margin):
return abs(float1 - float2) < margin
@ -104,21 +106,45 @@ def getArrangedIds(pathMap, startPathId):
nextPathId = closestId
return orderPathIds
def rotate(origin, point, angle):
"""
Rotate a point counterclockwise by a given angle around a given origin.
The angle should be given in radians.
"""
ox, oy = origin
px, py = point
qx = ox + math.cos(angle) * (px - ox) - math.sin(angle) * (py - oy)
qy = oy + math.sin(angle) * (px - ox) + math.cos(angle) * (py - oy)
return qx, qy
class JoinPaths(inkex.EffectExtension):
def add_arguments(self, pars):
pars.add_argument("--optimized", type=inkex.Boolean, default=True)
pars.add_argument("--add_dimples", type=inkex.Boolean, default=False)
pars.add_argument("--draw_dimple_centers", type=inkex.Boolean, default=False)
pars.add_argument("--dimple_invert", type=inkex.Boolean, default=False)
pars.add_argument("--dimple_type", default="lines")
pars.add_argument("--dimples_to_group", type=inkex.Boolean, default=False)
pars.add_argument("--draw_both_sides", type=inkex.Boolean, default=False)
pars.add_argument("--dimple_height_mode", default="by_height")
pars.add_argument("--dimple_height", type=float, default=4)
pars.add_argument("--dimple_angle", type=float, default=45)
pars.add_argument("--dimple_height_units", default="mm")
pars.add_argument("--tab", default="sampling", help="Tab")
def effect(self):
selections = self.svg.selected
pathNodes = self.document.xpath('//svg:path',namespaces=inkex.NSS)
paths = {p.get('id'): getPartsFromCubicSuper(CubicSuperPath(p.get('d'))) for p in pathNodes }
paths = {p.get('id'): getPartsFromCubicSuper(CubicSuperPath(p.get('d'))) for p in pathNodes }
#paths.keys() Order disturbed
pathIds = [p.get('id') for p in pathNodes]
if self.options.dimples_to_group is True:
dimpleUnifyGroup = self.svg.get_current_layer().add(inkex.Group(id=self.svg.get_unique_id("dimplesCollection")))
if(len(paths) > 1):
if(self.options.optimized):
startPathId = pathIds[0]
@ -140,16 +166,130 @@ class JoinPaths(inkex.EffectExtension):
if(vectCmpWithMargin(start, newParts[-1][-1][-1], margin = .01)):
newParts[-1] += parts[0]
else:
newSeg = [newParts[-1][-1][-1], newParts[-1][-1][-1], start, start]
newParts[-1].append(newSeg)
newParts[-1] += parts[0]
if self.options.add_dimples is True:
if self.options.dimples_to_group is True:
dimpleGroup = dimpleUnifyGroup.add(inkex.Group(id="dimpleGroup-{}".format(elem.attrib["id"])))
else:
dimpleGroup = elem.getparent().add(inkex.Group(id="dimpleGroup-{}".format(elem.attrib["id"])))
p1 = newParts[-1][-1][-1]
p2 = start
midPoint = [(p1[0] + p2[0])/2, (p1[1] + p2[1])/2]
newParts[-1].append([newParts[-1][-1][-1], newParts[-1][-1][-1], midPoint, midPoint])
newParts[-1].append([newParts[-1][-1][-1], newParts[-1][-1][-1], p2, p2])
newParts[-1] += parts[0]
#angle=self.options.dimple_angle
#p3 = rotate(midPoint, p2, math.radians(angle))
#p4 = rotate(midPoint, p2, math.radians(360-angle))
#add a new dimple
#line = self.svg.get_current_layer().add(inkex.PathElement(id=self.svg.get_unique_id('dimple')))
#line.set('d', "m{:0.6f},{:0.6f} L{:0.6f},{:0.6f}".format(midPoint[0], midPoint[1], p3[0], p3[1]))
#line.style = {'stroke': '#000000', 'fill': 'none', 'stroke-width': str(self.svg.unittouu('1px'))}
#add a new dimple
#line = self.svg.get_current_layer().add(inkex.PathElement(id=self.svg.get_unique_id('dimple')))
#line.set('d', "m{:0.6f},{:0.6f} L{:0.6f},{:0.6f}".format(midPoint[0], midPoint[1], p4[0], p4[1]))
#line.style = {'stroke': '#000000', 'fill': 'none', 'stroke-width': str(self.svg.unittouu('1px'))}
dx = midPoint[0]-p1[0]
dy = midPoint[1]-p1[1]
dist = math.sqrt(dx*dx + dy*dy)
dx /= dist
dy /= dist
dx2 = p2[0]-p1[0]
dy2 = p2[1]-p1[1]
dist2 = math.sqrt(dx2*dx2 + dy2*dy2)
if dx2 == 0:
slope=sys.float_info.max #vertical
else:
slope=(p2[1] - p1[1]) / dx2
slope_angle = 90 + math.degrees(math.atan(slope))
if self.options.dimple_height_mode == "by_height":
dimple_height = self.svg.unittouu(str(self.options.dimple_height) + self.options.dimple_height_units)
else:
dimple_height = dist * math.sin(math.radians(self.options.dimple_angle))
x3 = midPoint[0] + (dimple_height)*dy
y3 = midPoint[1] - (dimple_height)*dx
x4 = midPoint[0] - (dimple_height)*dy
y4 = midPoint[1] + (dimple_height)*dx
dimple_style = {'stroke': '#0000FF', 'fill': 'none', 'stroke-width': str(self.svg.unittouu('1px'))}
if self.options.draw_dimple_centers is True:
#add a new dimple center cross (4 segments)
line = dimpleGroup.add(inkex.PathElement(id=self.svg.get_unique_id('dimple_center_perp1')))
line.set('d', "M{:0.6f},{:0.6f} L{:0.6f},{:0.6f}".format(midPoint[0], midPoint[1], x3, y3))
line.style = dimple_style
line = dimpleGroup.add(inkex.PathElement(id=self.svg.get_unique_id('dimple_center_perp2')))
line.set('d', "M{:0.6f},{:0.6f} L{:0.6f},{:0.6f}".format(midPoint[0], midPoint[1], x4, y4))
line.style = dimple_style
line = dimpleGroup.add(inkex.PathElement(id=self.svg.get_unique_id('dimple_center_join1')))
line.set('d', "M{:0.6f},{:0.6f} L{:0.6f},{:0.6f}".format(p1[0], p1[1], midPoint[0], midPoint[1]))
line.style = dimple_style
line = dimpleGroup.add(inkex.PathElement(id=self.svg.get_unique_id('dimple_center_join1')))
line.set('d', "M{:0.6f},{:0.6f} L{:0.6f},{:0.6f}".format(midPoint[0], midPoint[1], p2[0], p2[1]))
line.style = dimple_style
if self.options.dimple_type == "lines":
if self.options.dimple_invert is True:
x5 = x3
y5 = y3
x3 = x4
y3 = y4
x4 = x5
y4 = y5
#add a new dimple center
line = dimpleGroup.add(inkex.PathElement(id=self.svg.get_unique_id('dimple')))
line.set('d', "M{:0.6f},{:0.6f} L{:0.6f},{:0.6f} L{:0.6f},{:0.6f}".format(p1[0], p1[1], x3, y3, p2[0], p2[1]))
line.style = dimple_style
if self.options.draw_both_sides is True:
#add a new opposite dimple center
line = dimpleGroup.add(inkex.PathElement(id=self.svg.get_unique_id('dimple')))
line.set('d', "M{:0.6f},{:0.6f} L{:0.6f},{:0.6f} L{:0.6f},{:0.6f}".format(p1[0], p1[1], x4, y4, p2[0], p2[1]))
line.style = dimple_style
else:
ellipse = dimpleGroup.add(inkex.Ellipse(id=self.svg.get_unique_id('dimple')))
ellipse.set('transform', "rotate({:0.6f} {:0.6f} {:0.6f})".format(slope_angle, midPoint[0], midPoint[1]))
ellipse.set('sodipodi:arc-type', "arc")
ellipse.set('sodipodi:type', "arc")
ellipse.set('sodipodi:cx', "{:0.6f}".format(midPoint[0]))
ellipse.set('sodipodi:cy', "{:0.6f}".format(midPoint[1]))
ellipse.set('sodipodi:rx', "{:0.6f}".format(dimple_height))
ellipse.set('sodipodi:ry', "{:0.6f}".format(dist2 / 2))
if self.options.draw_both_sides is False:
ellipse.set('sodipodi:open', 'true')
if self.options.dimple_invert is True:
ellipse.set('sodipodi:start', "{:0.6f}".format(math.radians(90.0)))
ellipse.set('sodipodi:end', "{:0.6f}".format(math.radians(270.0)))
else:
ellipse.set('sodipodi:start', "{:0.6f}".format(math.radians(270.0)))
ellipse.set('sodipodi:end', "{:0.6f}".format(math.radians(90.0)))
ellipse.style = dimple_style
#cleanup groups
if len(dimpleGroup) == 1: ##move up child if group has only one child
for child in dimpleGroup:
dimpleGroup.getparent().insert(elem.getparent().index(elem), child)
dimpleGroup.delete() #delete the empty group now
else:
newParts[-1].append([newParts[-1][-1][-1], newParts[-1][-1][-1], start, start])
newParts[-1] += parts[0]
if(len(parts) > 1):
newParts += parts[1:]
parent = elem.getparent()
idx = parent.index(elem)
parent.remove(elem)
if self.options.add_dimples is False:
parent.remove(elem)
except:
pass #elem might come from group item - in this case we need to ignore it
@ -157,7 +297,8 @@ class JoinPaths(inkex.EffectExtension):
oldId = firstElem.get('id')
newElem.set('d', CubicSuperPath(getCubicSuperFromParts(newParts)))
newElem.set('id', oldId + '_joined')
parent.insert(idx, newElem)
if self.options.add_dimples is False:
parent.insert(idx, newElem)
if __name__ == '__main__':
JoinPaths().run()

2
extensions/fablabchemnitz/join_paths/meta.json
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@ -1,6 +1,6 @@
[
{
"name": "Join Paths",
"name": "Join Paths / Create Dimples",
"id": "fablabchemnitz.de.join_paths",
"path": "join_paths",
"original_name": "Join Paths Optimized",