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mightyscape-1.1-deprecated/extensions/fablabchemnitz/join_paths/join_paths.py
2021-10-19 14:07:12 +02:00

389 lines
24 KiB
Python

#!/usr/bin/env python3
'''
Inkscape extension to join the selected paths. With the optimized option selected,
the next path to be joined is the one, which has one of its end nodes closest to the ending
node of the earlier path.
Copyright (C) 2019 Shrinivas Kulkarni
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
'''
import inkex
from inkex.paths import CubicSuperPath
import sys
import copy
import math
def floatCmpWithMargin(float1, float2, margin):
return abs(float1 - float2) < margin
def vectCmpWithMargin(vect1, vect2, margin):
return all(floatCmpWithMargin(vect2[i], vect1[i], margin) for i in range(0, len(vect1)))
def getPartsFromCubicSuper(cspath):
parts = []
for subpath in cspath:
part = []
prevBezPt = None
for i, bezierPt in enumerate(subpath):
if(prevBezPt != None):
seg = [prevBezPt[1], prevBezPt[2], bezierPt[0], bezierPt[1]]
part.append(seg)
prevBezPt = bezierPt
parts.append(part)
return parts
def getCubicSuperFromParts(parts):
cbsuper = []
for part in parts:
subpath = []
lastPt = None
pt = None
for seg in part:
if(pt == None):
ptLeft = seg[0]
pt = seg[0]
ptRight = seg[1]
subpath.append([ptLeft, pt, ptRight])
ptLeft = seg[2]
pt = seg[3]
subpath.append([ptLeft, pt, pt])
cbsuper.append(subpath)
return cbsuper
def getArrangedIds(pathMap, startPathId):
nextPathId = startPathId
orderPathIds = [nextPathId]
#Arrange in order
while(len(orderPathIds) < len(pathMap)):
minDist = 9e+100 #A large float
closestId = None
np = pathMap[nextPathId]
if np[-1] == []:
inkex.utils.debug("Warning. Selection seems to contain invalid paths, e.g. pointy paths like M 54,54 Z. Please check and try again!")
exit(1)
npPts = [np[-1][-1][-1]]
if(len(orderPathIds) == 1):#compare both the ends for the first path
npPts.append(np[0][0][0])
for key in pathMap:
if(key in orderPathIds):
continue
parts = pathMap[key]
start = parts[0][0][0]
end = parts[-1][-1][-1]
for i, npPt in enumerate(npPts):
dist = abs(start[0] - npPt[0]) + abs(start[1] - npPt[1])
if(dist < minDist):
minDist = dist
closestId = key
dist = abs(end[0] - npPt[0]) + abs(end[1] - npPt[1])
if(dist < minDist):
minDist = dist
pathMap[key] = [[[pts for pts in reversed(seg)] for seg in \
reversed(part)] for part in reversed(parts)]
closestId = key
#If start point of the first path is closer reverse its direction
if(i > 0 and closestId == key):
pathMap[nextPathId] = [[[pts for pts in reversed(seg)] for seg in \
reversed(part)] for part in reversed(np)]
orderPathIds.append(closestId)
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("--reverse", type=inkex.Boolean, default=False)
pars.add_argument("--margin", type=float, default=0.0100)
pars.add_argument("--add_dimples", type=inkex.Boolean, default=False)
pars.add_argument("--draw_dimple_centers", type=inkex.Boolean, default=False)
pars.add_argument("--draw_arcs_as_paths", 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_tab_angle", type=float, default=45)
pars.add_argument("--dimple_gap_filter", type=inkex.Boolean, default=False)
pars.add_argument("--dimple_min_gap", type=float, default=1)
pars.add_argument("--dimple_max_gap", type=float, default=40)
pars.add_argument("--dimple_gap_filter_units", default="mm")
pars.add_argument("--dimple_height_units", default="mm")
pars.add_argument("--tab", default="sampling", help="Tab")
def effect(self):
pathNodes = self.document.xpath('//svg:path',namespaces=inkex.NSS)
if self.options.reverse is True: #helps debugging some strange Z orders (try out)
pathNodes = pathNodes[::-1]
#pathNodes[0].path = pathNodes[0].path.reverse()
#pathNodes[0].path = pathNodes[-1].path.reverse()
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]
pathIds = getArrangedIds(paths, startPathId)
newParts = []
firstElem = None
for key in pathIds:
parts = paths[key]
# ~ parts = getPartsFromCubicSuper(cspath)
start = parts[0][0][0]
try:
elem = self.svg.selected[key]
if(len(newParts) == 0):
newParts += parts[:]
firstElem = elem
else:
if(vectCmpWithMargin(start, newParts[-1][-1][-1], margin = self.options.margin)) and self.options.add_dimples is False:
newParts[-1] += parts[0]
else:
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]
#get slope, distance and norm slope
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_gap_filter is True \
and dist2 >= self.svg.unittouu(str(self.options.dimple_min_gap) + self.options.dimple_gap_filter_units) \
and dist2 < self.svg.unittouu(str(self.options.dimple_max_gap) + self.options.dimple_gap_filter_units)
) \
or self.options.dimple_gap_filter is False:
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":
line = dimpleGroup.add(inkex.PathElement(id=self.svg.get_unique_id('dimple_line')))
line.set('d', "M{:0.6f},{:0.6f} L{:0.6f},{:0.6f}".format(p1[0], p1[1], p2[0], p2[1]))
line.style = dimple_style
if self.options.dimple_type == "peaks":
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_peak')))
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_peak')))
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
elif self.options.dimple_type == "arcs":
if self.options.draw_arcs_as_paths is False:
ellipse = dimpleGroup.add(inkex.Ellipse(id=self.svg.get_unique_id('dimple_arc')))
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.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
if self.options.draw_both_sides is True:
ellipse = dimpleGroup.add(inkex.Ellipse(id=self.svg.get_unique_id('dimple_arc')))
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.dimple_invert is True:
ellipse.set('sodipodi:start', "{:0.6f}".format(math.radians(270.0)))
ellipse.set('sodipodi:end', "{:0.6f}".format(math.radians(90.0)))
else:
ellipse.set('sodipodi:start', "{:0.6f}".format(math.radians(90.0)))
ellipse.set('sodipodi:end', "{:0.6f}".format(math.radians(270.0)))
ellipse.style = dimple_style
else: #if draw_arcs_as_paths is True
# +--- x-end point
# |
# counterclockwise ---+ | +--- y-end point
# | | |
#<path d="M 85 350 A 150 180 0 0 0 280 79" stroke="red" fill="none"/>
# | | | |
# 1 Radius x-Axis ---+ | | +--- 4 short / long way
# | |
# 2 Radius y-Axis ---+ +--- 3 Rotation x
if self.options.dimple_invert is True:
b1 = 1
b2 = 0
else:
b1 = 0
b2 = 1
ellipse = dimpleGroup.add(inkex.PathElement(id=self.svg.get_unique_id('dimple_arc')))
ellipse.set('d', "M {:0.6f} {:0.6f} A {:0.6f} {:0.6f} {:0.6f} 0 {} {:0.6f} {:0.6f}".format(p1[0], p1[1], dimple_height, dist2 / 2, slope_angle, b1, p2[0], p2[1]))
ellipse.style = dimple_style
if self.options.draw_both_sides is True:
ellipse = dimpleGroup.add(inkex.PathElement(id=self.svg.get_unique_id('dimple_arc')))
ellipse.set('d', "M {:0.6f} {:0.6f} A {:0.6f} {:0.6f} {:0.6f} 0 {} {:0.6f} {:0.6f}".format(p1[0], p1[1], dimple_height, dist2 / 2, slope_angle, b2, p2[0], p2[1]))
ellipse.style = dimple_style
elif self.options.dimple_type == "tabs":
pbottom1 = [p1[0] + (dimple_height)*dy, p1[1] - (dimple_height)*dx]
pbottom2 = [p2[0] + (dimple_height)*dy, p2[1] - (dimple_height)*dx]
ptop1 = [p1[0] - (dimple_height)*dy, p1[1] + (dimple_height)*dx]
ptop2 = [p2[0] - (dimple_height)*dy, p2[1] + (dimple_height)*dx]
l_hypo = dimple_height / (math.cos(math.radians(90.0 - self.options.dimple_tab_angle)))
pbottom1 = rotate(p1, [p1[0] + l_hypo * dx, p1[1] + l_hypo * dy], math.radians(-self.options.dimple_tab_angle))
pbottom2 = rotate(p2, [p2[0] - l_hypo * dx, p2[1] - l_hypo * dy], math.radians(-360.0 + self.options.dimple_tab_angle))
ptop1 = rotate(p1, [p1[0] + l_hypo * dx, p1[1] + l_hypo * dy], math.radians(self.options.dimple_tab_angle))
ptop2 = rotate(p2, [p2[0] - l_hypo * dx, p2[1] - l_hypo * dy], math.radians(360.0 - self.options.dimple_tab_angle))
if self.options.dimple_invert is True:
ptemp1 = pbottom1
ptemp2 = pbottom2
pbottom1 = ptop1
pbottom2 = ptop2
ptop1 = ptemp1
ptop2 = ptemp2
#add a new tab
line = dimpleGroup.add(inkex.PathElement(id=self.svg.get_unique_id('dimple_tab')))
line.set('d', "M{:0.6f},{:0.6f} L{:0.6f},{:0.6f} L{:0.6f},{:0.6f} L{:0.6f},{:0.6f}".format(
p1[0], p1[1], pbottom1[0], pbottom1[1], pbottom2[0], pbottom2[1], p2[0], p2[1]))
line.style = dimple_style
if self.options.draw_both_sides is True:
line = dimpleGroup.add(inkex.PathElement(id=self.svg.get_unique_id('dimple_tab')))
line.set('d', "M{:0.6f},{:0.6f} L{:0.6f},{:0.6f} L{:0.6f},{:0.6f} L{:0.6f},{:0.6f}".format(
p1[0], p1[1], ptop1[0], ptop1[1], ptop2[0], ptop2[1], p2[0], p2[1]))
line.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)
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
if firstElem is None:
self.msg('Please select some paths first. Check if you selected a group or an object instead.')
exit()
newElem = copy.copy(firstElem)
oldId = firstElem.get('id')
newElem.set('d', CubicSuperPath(getCubicSuperFromParts(newParts)))
newElem.set('id', oldId + '_joined')
if self.options.add_dimples is False:
parent.insert(idx, newElem)
if __name__ == '__main__':
JoinPaths().run()