FabLab_Chemnitz/mightyscape-0.92-deprecated
FabLab_Chemnitz/mightyscape-0.92-deprecated
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Updated chain paths extension to 0.6 release; added missing STLConverter executable

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This commit is contained in:
leyghisbb 2020-04-26 19:15:41 +02:00
parent 404e0b0462
commit d0752fbcef
4 changed files with 130 additions and 87 deletions
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3
extensions/fablabchemnitz_chain_paths.inx
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@ -14,12 +14,13 @@
<option value="px">px</option>
</param>
<param name="snap" type="boolean" _gui-text="Snap connecting ends together">false</param>
<param name="close" type="boolean" _gui-text="Close loops (start/end of the same path)">true</param>
<!-- Keep in sync with chain_paths.py line 19 __version__ = ... -->
<param name="about_version" type="description">
https://github.com/fablabnbg/inkscape-chain-paths
Version 0.5</param>
Version 0.6</param>
<effect needs-live-preview="false">
<object-type>path</object-type>
<effects-menu>

114
extensions/fablabchemnitz_chain_paths.py
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@ -17,11 +17,17 @@
# 2015-11-16 jw, V0.4 -- gui fully functional.
# 2015-11-26 jw, V0.5 -- HACK to resolve some self-reversing path segments.
# https://github.com/fablabnbg/inkscape-chain-paths/issues/1
# 2020-04-10 jw, V0.6 -- Close paths correctly. Self reversing path hack was too eager.
# Workaround for cubicsuperpath.parsePath/formatPath limitation.
# Started python3 compatibility.
__version__ = '0.5' # Keep in sync with chain_paths.inx ca line 22
__author__ = 'Juergen Weigert <juewei@fabmail.org>'
from __future__ import print_function
__version__ = '0.6' # Keep in sync with chain_paths.inx ca line 22
__author__ = 'Juergen Weigert <juergen@fabmail.org>'
import sys, os, shutil, time, logging, tempfile, math
import re
#debug = True
debug = False
@ -63,6 +69,7 @@ class ChainPaths(inkex.Effect):
# as establishing a transform from the viewbox to the display.
self.chain_epsilon = 0.01
self.snap_ends = True
self.close_loops = True
self.segments_done = {}
self.min_missed_distance_sq = None
self.chained_count = 0
@ -74,18 +81,18 @@ class ChainPaths(inkex.Effect):
self.tty = open("CON:", 'w') # windows. Does this work???
except:
self.tty = open(os.devnull, 'w') # '/dev/null' for POSIX, 'nul' for Windows.
if debug: print >>self.tty, "__init__"
if debug: print("__init__", file=self.tty)
self.OptionParser.add_option('-V', '--version',
action = 'store_const', const=True, dest='version', default=False,
help = 'Just print version number ("' + __version__ + '") and exit.')
self.OptionParser.add_option('-s', '--snap', action='store', dest='snap_ends', type='inkbool', default=True, help='snap end-points together when connecting')
self.OptionParser.add_option('-c', '--close', action='store', dest='close_loops', type='inkbool', default=True, help='close loops (start/end of the same path)')
self.OptionParser.add_option('-u', '--units', action='store', dest="units", type="string", default="mm", help="measurement unit for epsilon")
self.OptionParser.add_option('-e', '--epsilon', action='store',
type='float', dest='chain_epsilon', default=0.01, help="Max. distance to connect [mm]")
def version(self):
print "hiuhu"
return __version__
def author(self):
return __author__
@ -112,7 +119,7 @@ class ChainPaths(inkex.Effect):
if not id in self.segments_done:
self.segments_done[id] = {}
self.segments_done[id][n] = True
if debug: print >>self.tty, "done", id, n, msg
if debug: print("done", id, n, msg, file=self.tty)
def is_segment_done(self, id, n):
if not id in self.segments_done:
@ -156,12 +163,13 @@ class ChainPaths(inkex.Effect):
def effect(self):
if self.options.version:
print __version__
print(__version__)
sys.exit(0)
self.calc_unit_factor(self.options.units)
if self.options.snap_ends is not None: self.snap_ends = self.options.snap_ends
if self.options.close_loops is not None: self.close_loops = self.options.close_loops
if self.options.chain_epsilon is not None: self.chain_epsilon = self.options.chain_epsilon
if self.chain_epsilon < 0.001: self.chain_epsilon = 0.001 # keep a minimum.
self.eps_sq = self.chain_epsilon * self.unit_factor * self.chain_epsilon * self.unit_factor
@ -175,33 +183,32 @@ class ChainPaths(inkex.Effect):
if node.tag != inkex.addNS('path', 'svg'):
inkex.errormsg(_("Object " + id + " is not a path. Try\n - Path->Object to Path\n - Object->Ungroup"))
return
if debug: print >>self.tty, "id="+str(id), "tag="+str(node.tag)
if debug: print("id=" + str(id), "tag=" + str(node.tag), file=self.tty)
path_d = cubicsuperpath.parsePath(node.get('d'))
sub_idx = -1
for sub in path_d:
sub_idx += 1
# sub = [[[200.0, 300.0], [200.0, 300.0], [175.0, 290.0]], [[175.0, 265.0], [220.37694, 256.99876], [175.0, 240.0]], [[175.0, 215.0], [200.0, 200.0], [200.0, 200.0]]]
# this is a path of three points. All the bezier handles are included. the Structure is:
# [[handle0_x, point0, handle0_1], [handle1_0, point1, handle1_2], [handle2_1, point2, handle2_x]]
if debug: print >>self.tty, " sub="+str(sub)
# [[handle0_OUT, point0, handle0_1], [handle1_0, point1, handle1_2], [handle2_1, point2, handle2_OUT]]
# the _OUT handles at the end of the path are ignored. The data structure has them identical to their points.
#
if debug: print(" sub=" + str(sub), file=self.tty)
end1 = [sub[ 0][1][0], sub[ 0][1][1]]
end2 = [sub[-1][1][0], sub[-1][1][1]]
while ((len(sub) > 1) and self.near_ends(end1, end2)):
if debug: print >>self.tty, "splitting self-reversing path, length:", len(sub)
## We split the path and generate more snippets.
splitp=[sub[-2][1][0],sub[-2][1][1]]
segments.append({'id': id, 'n': sub_idx, 'end1': splitp, 'end2':end2, 'seg': [sub[-2],sub[-1]]})
sub_idx += 1
# Remove trivial self revesal when building candidate segments list.
if ((len(sub) == 3) and self.near_ends(end1, end2)):
if debug: print("dropping segment from self-reversing path, length:", len(sub), file=self.tty)
sub.pop()
end2=splitp
end2 = [sub[-1][1][0], sub[-1][1][1]]
segments.append({'id': id, 'n': sub_idx, 'end1': end1, 'end2':end2, 'seg': sub})
if node.get(inkex.addNS('type', 'sodipodi')):
del node.attrib[inkex.addNS('type', 'sodipodi')]
if debug: print >>self.tty, "-------- seen:"
if debug: print("-------- seen:", file=self.tty)
for s in segments:
if debug: print >>self.tty, s['id'],s['n'],s['end1'],s['end2']
if debug: print(s['id'], s['n'], s['end1'], s['end2'], file=self.tty)
# chain the segments
obsoleted = 0
@ -209,9 +216,11 @@ class ChainPaths(inkex.Effect):
for id, node in self.selected.iteritems():
# path_style = simplestyle.parseStyle(node.get('style'))
path_d = cubicsuperpath.parsePath(node.get('d'))
# ATTENTION: for parsePath() it is the same, if first and last point coincide, or if the path is really closed.
path_closed = True if re.search("z\s*$", node.get('d')) else False
new = []
cur_idx = -1
for cur in path_d:
for chain in path_d:
cur_idx += 1
if not self.is_segment_done(id, cur_idx):
# quadratic algorithm: we check both ends of the current segment.
@ -222,8 +231,14 @@ class ChainPaths(inkex.Effect):
# end1-end2: The new segment is prepended to the current segment.
# end2-end1: The new segment is appended to the current segment.
self.set_segment_done(id, cur_idx, "output") # do not cross with ourselves.
end1=[cur[0][1][0],cur[0][1][1]]
end2=[cur[-1][1][0],cur[-1][1][1]]
end1 = [chain[ 0][1][0], chain[ 0][1][1]]
end2 = [chain[-1][1][0], chain[-1][1][1]]
# Remove trivial self revesal when doing the actual chain operation.
if ((len(chain) == 3) and self.near_ends(end1, end2)):
chain.pop()
end2 = [chain[-1][1][0], chain[-1][1][1]]
segments_idx = 0
while segments_idx < len(segments):
seg = segments[segments_idx]
@ -235,42 +250,69 @@ class ChainPaths(inkex.Effect):
self.near_ends(end2, seg['end2'])):
seg['seg'] = self.reverse_segment(seg['seg'])
seg['end1'], seg['end2'] = seg['end2'], seg['end1']
if debug: print >>self.tty, "reversed seg", seg['id'], seg['n']
if debug: print("reversed seg", seg['id'], seg['n'], file=self.tty)
if self.near_ends(end1, seg['end2']):
# prepend seg to cur
# prepend seg to chain
self.set_segment_done(seg['id'], seg['n'], 'prepended to ' + id + ' ' + str(cur_idx))
cur = self.link_segments(seg['seg'], cur)
end1=[cur[0][1][0],cur[0][1][1]]
segments_idx = 0
chain = self.link_segments(seg['seg'], chain)
end1 = [chain[0][1][0], chain[0][1][1]]
segments_idx = 0 # this chain changed. re-visit all candidate
continue
if self.near_ends(end2, seg['end1']):
# append seg to cur
# append seg to chain
self.set_segment_done(seg['id'], seg['n'], 'appended to ' + id + ' ' + str(cur_idx))
cur = self.link_segments(cur, seg['seg'])
end2=[cur[-1][1][0],cur[-1][1][1]]
segments_idx = 0
chain = self.link_segments(chain, seg['seg'])
end2 = [chain[-1][1][0], chain[-1][1][1]]
segments_idx = 0 # this chain changed. re-visit all candidate
continue
segments_idx += 1
new.append(cur)
# Now all joinable segments are joined.
# Finally, we can check, if the resulting path is a closed path:
# Closing a path here, isolates it from the rest.
# But as we prefer to make the chain as long as possible, we close late.
if self.near_ends(end1, end2) and not path_closed and self.close_loops:
if debug: print("closing closeable loop", id, file=self.tty)
if self.snap_ends:
# move first point to mid position
x1n = (chain[0][1][0] + chain[-1][1][0]) * 0.5
y1n = (chain[0][1][1] + chain[-1][1][1]) * 0.5
chain[0][1][0], chain[0][1][1] = x1n, y1n
# merge handle of the last point to the handle of the first point
dx0e = chain[-1][0][0] - chain[-1][1][0]
dy0e = chain[-1][0][1] - chain[-1][1][1]
if debug: print("handle diff: ", dx0e, dy0e, file=self.tty)
# FIXME: this does not work. cubicsuperpath.formatPath() ignores this handle.
chain[0][0][0], chain[0][0][1] = x1n+dx0e, y1n+dy0e
# drop last point
chain.pop()
end2 = [chain[-1][1][0], chain[-1][1][1]]
path_closed = True
self.chained_count +=1
new.append(chain)
if not len(new):
# node.clear()
node.getparent().remove(node)
obsoleted += 1
if debug: print >>self.tty, "Path node obsoleted:", id
if debug: print("Path node obsoleted:", id, file=self.tty)
else:
remaining += 1
node.set('d',cubicsuperpath.formatPath(new))
# BUG: All previously closed loops, are open, after we convert them back with cubicsuperpath.formatPath()
p_fmt = cubicsuperpath.formatPath(new)
if path_closed: p_fmt += " z"
if debug: print("new path :", p_fmt, file=self.tty)
node.set('d', p_fmt)
# statistics:
print >>self.tty, "Path nodes obsoleted:", obsoleted, "\nPath nodes remaining:", remaining
if debug: print("Path nodes obsoleted:", obsoleted, "\nPath nodes remaining:", remaining, file=self.tty)
if self.min_missed_distance_sq is not None:
print >>self.tty, "min_missed_distance:", math.sqrt(float(self.min_missed_distance_sq))/self.unit_factor, '>', self.chain_epsilon, self.options.units
print >>self.tty, "Successful link operations: ", self.chained_count
if debug: print("min_missed_distance:", math.sqrt(float(self.min_missed_distance_sq))/self.unit_factor, '>', self.chain_epsilon, self.options.units, file=self.tty)
if debug: print("Successful link operations: ", self.chained_count, file=self.tty)
if __name__ == '__main__':
e = ChainPaths()

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extensions/papercraft/STLConverter.exe Normal file
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extensions/svg2shenzhen/.DS_Store vendored
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