#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright 2019 Hiroshi Murayama <opiopan@gmail.com>
import io
from math import pi, cos, sin, tan, atan, atan2, acos, asin, sqrt
from gerber.cam import CamFile, FileSettings
from gerber.utils import inch, metric, write_gerber_value
from gerber.gerber_statements import ADParamStmt
import dxfgrabber
class DxfStatement(object):
def __init__(self, entity):
self.entity = entity
def to_gerber(self, settings=None):
pass
def to_inch(self):
pass
def to_metric(self):
pass
class DxfLineStatement(DxfStatement):
def __init__(self, entity):
super(DxfLineStatement, self).__init__(entity)
def to_gerber(self, settings=FileSettings):
x0 = self.entity.start[0]
y0 = self.entity.start[1]
x1 = self.entity.end[0]
y1 = self.entity.end[1]
return 'G01*\nX{0}Y{1}D02*\nX{2}Y{3}D01*'.format(
write_gerber_value(x0, settings.format,
settings.zero_suppression),
write_gerber_value(y0, settings.format,
settings.zero_suppression),
write_gerber_value(x1, settings.format,
settings.zero_suppression),
write_gerber_value(y1, settings.format,
settings.zero_suppression)
)
def to_inch(self):
self.entity.start[idx] = (
inch(self.entity.start[idx][0]), inch(self.entity.start[idx][1]))
self.entity.end[idx] = (
inch(self.entity.end[idx][0]), inch(self.entity.end[idx][1]))
def to_metric(self):
self.entity.start[idx] = (
metric(self.entity.start[idx][0]), inch(self.entity.start[idx][1]))
self.entity.end[idx] = (
metric(self.entity.end[idx][0]), inch(self.entity.end[idx][1]))
class DxfCircleStatement(DxfStatement):
def __init__(self, entity):
super(DxfCircleStatement, self).__init__(entity)
def to_gerber(self, settings=FileSettings):
r = self.entity.radius
x0 = self.entity.center[0]
y0 = self.entity.center[1]
return 'G01*\nX{0}Y{1}D02*\n' \
'G75*\nG03*\nX{2}Y{3}I{4}J{5}D01*'.format(
write_gerber_value(x0 + r, settings.format,
settings.zero_suppression),
write_gerber_value(y0, settings.format,
settings.zero_suppression),
write_gerber_value(x0 + r, settings.format,
settings.zero_suppression),
write_gerber_value(y0, settings.format,
settings.zero_suppression),
write_gerber_value(-r, settings.format,
settings.zero_suppression),
write_gerber_value(0, settings.format,
settings.zero_suppression)
)
def to_inch(self):
self.entity.radius = inch(self.entity.radius)
self.entity.center[idx] = (
inch(self.entity.center[idx][0]), inch(self.entity.center[idx][1]))
def to_metric(self):
self.entity.radius = metric(self.entity.radius)
self.entity.center[idx] = (
metric(self.entity.center[idx][0]), metric(self.entity.center[idx][1]))
class DxfArcStatement(DxfStatement):
def __init__(self, entity):
super(DxfArcStatement, self).__init__(entity)
def to_gerber(self, settings=FileSettings):
deg0 = self.entity.start_angle
deg1 = self.entity.end_angle
r = self.entity.radius
x0 = self.entity.center[0]
y0 = self.entity.center[1]
begin_x = x0 + r * cos(deg0 / 180. * pi)
begin_y = y0 + r * sin(deg0 / 180. * pi)
end_x = x0 + r * cos(deg1 / 180. * pi)
end_y = y0 + r * sin(deg1 / 180. * pi)
return 'G01*\nX{0}Y{1}D02*\n' \
'G75*\nG{2}*\nX{3}Y{4}I{5}J{6}D01*'.format(
write_gerber_value(begin_x, settings.format,
settings.zero_suppression),
write_gerber_value(begin_y, settings.format,
settings.zero_suppression),
'03',
write_gerber_value(end_x, settings.format,
settings.zero_suppression),
write_gerber_value(end_y, settings.format,
settings.zero_suppression),
write_gerber_value(x0 - begin_x, settings.format,
settings.zero_suppression),
write_gerber_value(y0 - begin_y, settings.format,
settings.zero_suppression)
)
def to_inch(self):
self.entity.start_angle = inch(self.entity.start_angle)
self.entity.end_angle = inch(self.entity.end_angle)
self.entity.radius = inch(self.entity.radius)
self.entity.center[idx] = (
inch(self.entity.center[idx][0]), inch(self.entity.center[idx][1]))
def to_metric(self):
self.entity.start_angle = metric(self.entity.start_angle)
self.entity.end_angle = metric(self.entity.end_angle)
self.entity.radius = metric(self.entity.radius)
self.entity.center[idx] = (
metric(self.entity.center[idx][0]), metric(self.entity.center[idx][1]))
class DxfPolylineStatement(DxfStatement):
def __init__(self, entity):
super(DxfPolylineStatement, self).__init__(entity)
def to_gerber(self, settings=FileSettings()):
x0 = self.entity.points[0][0]
y0 = self.entity.points[0][1]
b = self.entity.bulge[0]
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),
)
def ptseq():
for i in range(1, len(self.entity.points)):
yield i
if self.entity.is_closed:
yield 0
for idx in ptseq():
pt = self.entity.points[idx]
x1 = pt[0]
y1 = pt[1]
if b == 0:
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),
)
else:
ang = 4 * atan(b)
xm = x0 + x1
ym = y0 + y1
t = 1 / tan(ang / 2)
xc = (xm - t * (y1 - y0)) / 2
yc = (ym + t * (x1 - x0)) / 2
r = sqrt((x0 - xc)*(x0 - xc) + (y0 - yc)*(y0 - yc))
gerber += '\nG{0}*\nX{1}Y{2}I{3}J{4}D01*'.format(
'03' if ang > 0 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)
)
x0 = x1
y0 = y1
b = self.entity.bulge[idx]
return gerber
def to_inch(self):
for idx in range(0, len(self.entity.points)):
self.entity.points[idx] = (
inch(self.entity.points[idx][0]), inch(self.entity.points[idx][1]))
self.entity.bulge[idx] = inch(self.entity.bulge[idx])
def to_metric(self):
for idx in range(0, len(self.entity.points)):
self.entity.points[idx] = (
metric(self.entity.points[idx][0]), metric(self.entity.points[idx][1]))
self.entity.bulge[idx] = metric(self.entity.bulge[idx])
class DxfStatements(object):
def __init__(self, entities, units, dcode=10, draw_mode=None):
if draw_mode == None:
draw_mode = DxfFile.DM_LINE
self._units = units
self.dcode = dcode
self.draw_mode = draw_mode
self.statements = []
for entity in entities:
if entity.dxftype == 'LWPOLYLINE':
self.statements.append(DxfPolylineStatement(entity))
elif entity.dxftype == 'LINE':
self.statements.append(DxfLineStatement(entity))
elif entity.dxftype == 'CIRCLE':
self.statements.append(DxfCircleStatement(entity))
elif entity.dxftype == 'ARC':
self.statements.append(DxfArcStatement(entity))
@property
def units(self):
return _units
def to_gerber(self, settings=FileSettings()):
def gerbers():
yield 'D{0}*'.format(self.dcode)
if self.draw_mode == DxfFile.DM_FILL:
yield 'G36*'
for statement in self.statements:
if isinstance(statement, DxfCircleStatement) or \
(isinstance(statement, DxfPolylineStatement) and statement.entity.is_closed):
yield statement.to_gerber(settings)
yield 'G37*'
else:
for statement in self.statements:
yield statement.to_gerber(settings)
return '\n'.join(gerbers())
def to_inch(self):
if self._units == 'metric':
self._units = 'inch'
for statement in self.statements:
statement.to_inch()
def to_metric(self):
if self._units == 'inch':
self._units = 'metric'
for statement in self.statements:
statement.to_metric()
class DxfHeaderStatement(object):
def to_gerber(self, settings):
return 'G75*\n'\
'%MO{0}*%\n'\
'%OFA0B0*%\n'\
'%FS{1}AX{2}{3}Y{4}{5}*%\n'\
'%IPPOS*%\n'\
'%LPD*%'.format(
'IN' if settings.units == 'inch' else 'MM',
'L' if settings.zero_suppression == 'leading' else 'T',
settings.format[0], settings.format[1],
settings.format[0], settings.format[1]
)
def to_inch(self):
pass
def to_metric(self):
pass
class DxfFile(CamFile):
DM_LINE = 0
DM_FILL = 1
def __init__(self, dxf, settings=FileSettings(), draw_mode=None, filename=None):
if draw_mode == None:
draw_mode = self.DM_LINE
if dxf.header['$INSUNITS'] == 1:
settings.units = 'inch'
settings.format = (2, 5)
else:
settings.units = 'metric'
settings.format = (3, 4)
super(DxfFile, self).__init__(settings=settings, filename=filename)
self._draw_mode = draw_mode
self.header = DxfHeaderStatement()
self.aperture = ADParamStmt.circle(dcode=10, diameter=0.0)
self.statements = DxfStatements(dxf.entities, self.units, dcode=self.aperture.d, draw_mode=self.draw_mode)
@property
def dcode(self):
return self.aperture.dcode
@dcode.setter
def dcode(self, value):
self.aperture.d = value
self.statements.dcode = value
@property
def width(self):
return self.aperture.modifiers[0][0]
@width.setter
def width(self, value):
self.aperture.modifiers = ([float(value),],)
@property
def draw_mode(self):
return self._draw_mode
@draw_mode.setter
def draw_mode(self, value):
self._draw_mode = value
self.statements.draw_mode = value
def write(self, filename=None):
if self.settings.notation != 'absolute':
raise Exception('DXF file\'s notation must be absolute ')
filename = filename if filename is not None else self.filename
with open(filename, 'w') as f:
f.write(self.header.to_gerber(self.settings) + '\n')
f.write(self.aperture.to_gerber(self.settings) + '\n')
f.write(self.statements.to_gerber(self.settings) + '\n')
f.write('M02*\n')
def to_inch(self):
if self.units == 'metric':
self.header.to_inch()
self.aperture.to_inch()
self.statements.to_inch()
self.units = 'inch'
def to_metric(self):
if self.units == 'inch':
self.header.to_metric()
self.aperture.to_metric()
self.statements.to_metric()
self.units = 'metric'
def offset(self, ofset_x, offset_y):
raise Exception('Not supported')
def loads(data, filename=None):
stream = io.StringIO(data)
dxf = dxfgrabber.read(stream)
return DxfFile(dxf)