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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright 2019 Hiroshi Murayama <opiopan@gmail.com>
from gerber.utils import inch, metric, write_gerber_value
from gerber.cam import FileSettings
class DxfPath(object):
def __init__(self, statement, error_range=0):
self.statements = [statement]
self.error_range = error_range
@property
def start(self):
return self.statements[0].start
@property
def end(self):
return self.statements[-1].end
@property
def is_closed(self):
from gerberex.dxf import is_equal_point
return len(self.statements) > 1 and \
is_equal_point(self.start, self.end, self.error_range)
def is_equal_to(self, target, error_range=0):
from gerberex.dxf import is_equal_point
if not isinstance(target, DxfPath):
return False
if len(self.statements) != len(target.statements):
return False
if is_equal_point(self.start, target.start, error_range) and \
is_equal_point(self.end, target.end, error_range):
for i in range(0, len(self.statements)):
if not self.statements[i].is_equal_to(target.statements[i], error_range):
return False
return True
elif is_equal_point(self.start, target.end, error_range) and \
is_equal_point(self.end, target.start, error_range):
for i in range(0, len(self.statements)):
if not self.statements[i].is_equal_to(target.statements[-1 - i], error_range):
return False
return True
return False
def to_inch(self):
self.error_range = inch(self.error_range)
def to_metric(self):
self.error_range = metric(self.error_range)
def reverse(self):
rlist = []
for statement in reversed(self.statements):
statement.reverse()
rlist.append(statement)
self.statements = rlist
def merge(self, element, error_range=0):
from gerberex.dxf import is_equal_point
if self.is_closed or element.is_closed:
return False
if not error_range:
error_range = self.error_range
if is_equal_point(self.end, element.start, error_range):
return self._append_at_end(element, error_range)
elif is_equal_point(self.end, element.end, error_range):
element.reverse()
return self._append_at_end(element, error_range)
elif is_equal_point(self.start, element.end, error_range):
return self._insert_on_top(element, error_range)
elif is_equal_point(self.start, element.start, error_range):
element.reverse()
return self._insert_on_top(element, error_range)
else:
return False
def _append_at_end(self, element, error_range=0):
if isinstance(element, DxfPath):
if self.is_equal_to(element, error_range):
return False
for i in range(0, min(len(self.statements), len(element.statements))):
if not self.statements[-1 - i].is_equal_to(element.statements[i]):
break
for j in range(0, min(len(self.statements), len(element.statements))):
if not self.statements[j].is_equal_to(element.statements[-1 - j]):
break
if i + j >= len(element.statements):
return False
mergee = list(element.statements)
if i > 0:
del mergee[0:i]
del self.statements[-i]
if j > 0:
del mergee[-j]
del self.statements[0:j]
self.statements.extend(mergee)
return True
else:
if self.statements[-1].is_equal_to(element, error_range) or \
self.statements[0].is_equal_to(element, error_range):
return False
self.statements.appen(element)
return True
def _insert_on_top(self, element, error_range=0):
if isinstance(element, DxfPath):
if self.is_equal_to(element, error_range):
return False
for i in range(0, min(len(self.statements), len(element.statements))):
if not self.statements[-1 - i].is_equal_to(element.statements[i]):
break
for j in range(0, min(len(self.statements), len(element.statements))):
if not self.statements[j].is_equal_to(element.statements[-1 - j]):
break
if i + j >= len(element.statements):
return False
mergee = list(element.statements)
if i > 0:
del mergee[0:i]
del self.statements[-i]
if j > 0:
del mergee[-j]
del self.statements[0:j]
self.statements[0:0] = mergee
return True
else:
if self.statements[-1].is_equal_to(element, error_range) or \
self.statements[0].is_equal_to(element, error_range):
return False
self.statements.insert(0, element)
return True
def to_gerber(self, settings=FileSettings(), pitch=0, width=0):
from gerberex.dxf import DxfArcStatement
if pitch:
return
x0, y0 = self.statements[0].start
gerber = 'G01*\nX{0}Y{1}D02*\nG75*'.format(
write_gerber_value(x0, settings.format,
settings.zero_suppression),
write_gerber_value(y0, settings.format,
settings.zero_suppression),
)
for statement in self.statements:
x0, y0 = statement.start
x1, y1 = statement.end
if isinstance(statement, DxfArcStatement):
xc, yc = statement.center
gerber += '\nG{0}*\nX{1}Y{2}I{3}J{4}D01*'.format(
'03' if statement.end_angle > statement.start_angle else '02',
write_gerber_value(x1, settings.format,
settings.zero_suppression),
write_gerber_value(y1, settings.format,
settings.zero_suppression),
write_gerber_value(xc - x0, settings.format,
settings.zero_suppression),
write_gerber_value(yc - y0, settings.format,
settings.zero_suppression)
)
else:
gerber += '\nG01*\nX{0}Y{1}D01*'.format(
write_gerber_value(x1, settings.format,
settings.zero_suppression),
write_gerber_value(y1, settings.format,
settings.zero_suppression),
)
return gerber
def generate_closed_paths(statements, error_range=0):
from gerberex.dxf import DxfLineStatement, DxfArcStatement
paths = [DxfPath(s, error_range) \
for s in filter(lambda s: isinstance(s, DxfLineStatement) or \
isinstance(s, DxfArcStatement), statements)]
prev_paths_num = 0
while prev_paths_num != len(paths):
working = []
for i in range(len(paths)):
mergee = paths[i]
for j in range(i + 1, len(paths) - 1):
target = paths[j]
if target.merge(mergee, error_range):
break
else:
working.append(mergee)
prev_paths_num = len(paths)
paths = working
return list(filter(lambda p: p.is_closed, paths))
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