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-rw-r--r--gerberex/dxf.py327
1 files changed, 125 insertions, 202 deletions
diff --git a/gerberex/dxf.py b/gerberex/dxf.py
index ae543ae..8f0b984 100644
--- a/gerberex/dxf.py
+++ b/gerberex/dxf.py
@@ -12,7 +12,7 @@ from gerber.gerber_statements import ADParamStmt
from gerber.excellon_statements import ExcellonTool
from gerber.excellon_statements import CoordinateStmt
from gerberex.utility import is_equal_point, is_equal_value
-from gerberex.dxf_path import generate_closed_paths
+from gerberex.dxf_path import generate_paths
from gerberex.excellon import write_excellon_header
from gerberex.rs274x import write_gerber_header
@@ -25,12 +25,6 @@ class DxfStatement(object):
self.end = None
self.is_closed = False
- def to_gerber(self, settings=None, pitch=0, width=0):
- pass
-
- def to_excellon(self, settings=None, pitch=0, width=0):
- pass
-
def to_inch(self):
pass
@@ -61,38 +55,6 @@ class DxfLineStatement(DxfStatement):
super(DxfLineStatement, self).__init__(entity)
self.start = start
self.end = end
-
- def to_gerber(self, settings=FileSettings(), pitch=0, width=0):
- if pitch == 0:
- x0, y0 = self.start
- x1, y1 = self.end
- 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)
- )
- else:
- gstr = ""
- for p in self._dots(pitch, width):
- gstr += 'X{0}Y{1}D03*\n'.format(
- write_gerber_value(p[0], settings.format,
- settings.zero_suppression),
- write_gerber_value(p[1], settings.format,
- settings.zero_suppression))
- return gstr
-
- def to_excellon(self, settings=FileSettings(), pitch=0, width=0):
- if not pitch:
- return
- gstr = ""
- for p in self._dots(pitch, width):
- gstr += CoordinateStmt(x=p[0], y=p[1]).to_excellon(settings) + '\n'
- return gstr
def to_inch(self):
self.start = (
@@ -119,7 +81,7 @@ class DxfLineStatement(DxfStatement):
self.start = self.end
self.end = pt
- def _dots(self, pitch, width):
+ def dots(self, pitch, width, offset=0):
x0, y0 = self.start
x1, y1 = self.end
y1 = self.end[1]
@@ -128,13 +90,18 @@ class DxfLineStatement(DxfStatement):
l = sqrt(xp * xp + yp * yp)
xd = xp * pitch / l
yd = yp * pitch / l
+ x0 += xp * offset / l
+ y0 += yp * offset / l
- d = 0;
- while d < l + width / 2:
- yield (x0, y0)
- x0 += xd
- y0 += yd
- d += pitch
+ if offset > l + width / 2:
+ return (None, offset - l)
+ else:
+ d = offset;
+ while d < l + width / 2:
+ yield ((x0, y0), d - l)
+ x0 += xd
+ y0 += yd
+ d += pitch
def offset(self, offset_x, offset_y):
self.start = (self.start[0] + offset_x, self.start[1] + offset_y)
@@ -144,104 +111,34 @@ class DxfLineStatement(DxfStatement):
self.start = rotate_point(self.start, angle, center)
self.end = rotate_point(self.end, angle, center)
-class DxfCircleStatement(DxfStatement):
- def __init__(self, entity):
- super(DxfCircleStatement, self).__init__(entity)
- self.radius = self.entity.radius
- self.center = (self.entity.center[0], self.entity.center[1])
- self.start = (self.center[0] + self.radius, self.center[1])
- self.end = self.start
- self.is_closed = True
-
- def to_gerber(self, settings=FileSettings(), pitch=0, width=0):
- if pitch:
- return
- r = self.radius
- x0, y0 = self.center
- 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.radius = inch(self.radius)
- self.center = (
- inch(self.center[0]), inch(self.center[1]))
-
- def to_metric(self):
- self.radius = metric(self.radius)
- self.center = (
- metric(self.center[0]), metric(self.center[1]))
-
- def is_equal_to(self, target, error_range=0):
- if not isinstance(target, DxfCircleStatement):
- return False
- return is_equal_point(self.center, target.enter, error_range) and \
- is_equal_value(self.radius, target.radius)
-
- def reverse(self):
- pass
-
- def offset(self, offset_x, offset_y):
- self.center = (self.center[0] + offset_x, self.center[1] + offset_y)
-
- def rotate(self, angle, center=(0, 0)):
- self.center = rotate_point(self.center, angle, center)
-
class DxfArcStatement(DxfStatement):
def __init__(self, entity):
super(DxfArcStatement, self).__init__(entity)
- self.start_angle = self.entity.start_angle
- self.end_angle = self.entity.end_angle
- self.radius = self.entity.radius
- self.center = (self.entity.center[0], self.entity.center[1])
- self.start = (
- self.center[0] + self.radius * cos(self.start_angle / 180. * pi),
- self.center[1] + self.radius * sin(self.start_angle / 180. * pi),
- )
- self.end = (
- self.center[0] + self.radius * cos(self.end_angle / 180. * pi),
- self.center[1] + self.radius * sin(self.end_angle / 180. * pi),
- )
- angle = self.end_angle - self.start_angle
- self.is_closed = angle >= 360 or angle <= -360
-
- def to_gerber(self, settings=FileSettings(), pitch=0, width=0):
- if pitch:
- return
- x0 = self.center[0]
- y0 = self.center[1]
- start_x, start_y = self.start
- end_x, end_y = self.end
-
- return 'G01*\nX{0}Y{1}D02*\n' \
- 'G75*\nG{2}*\nX{3}Y{4}I{5}J{6}D01*'.format(
- write_gerber_value(start_x, settings.format,
- settings.zero_suppression),
- write_gerber_value(start_y, settings.format,
- settings.zero_suppression),
- '02' if self.start_angle > self.end_angle else '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 - start_x, settings.format,
- settings.zero_suppression),
- write_gerber_value(y0 - start_y, settings.format,
- settings.zero_suppression)
- )
+ if entity.dxftype == 'CIRCLE':
+ self.radius = self.entity.radius
+ self.center = (self.entity.center[0], self.entity.center[1])
+ self.start = (self.center[0] + self.radius, self.center[1])
+ self.end = self.start
+ self.start_angle = 0
+ self.end_angle = -360
+ self.is_closed = True
+ elif entity.dxftype == 'ARC':
+ self.start_angle = self.entity.start_angle
+ self.end_angle = self.entity.end_angle
+ self.radius = self.entity.radius
+ self.center = (self.entity.center[0], self.entity.center[1])
+ self.start = (
+ self.center[0] + self.radius * cos(self.start_angle / 180. * pi),
+ self.center[1] + self.radius * sin(self.start_angle / 180. * pi),
+ )
+ self.end = (
+ self.center[0] + self.radius * cos(self.end_angle / 180. * pi),
+ self.center[1] + self.radius * sin(self.end_angle / 180. * pi),
+ )
+ angle = self.end_angle - self.start_angle
+ self.is_closed = angle >= 360 or angle <= -360
+ else:
+ raise Exception('invalid DXF type was specified')
def to_inch(self):
self.radius = inch(self.radius)
@@ -274,6 +171,28 @@ class DxfArcStatement(DxfStatement):
self.start = self.end
self.end = tmp
+ def dots(self, pitch, width, offset=0):
+ angle = self.end_angle - self.start_angle
+ afactor = 1 if angle > 0 else -1
+ aangle = angle * afactor
+ L = 2 * pi * self.radius
+ l = L * aangle / 360
+ pangle = pitch / L * 360
+ wangle = width / L * 360
+ oangle = offset / L * 360
+
+ if offset > l + width / 2:
+ yield (None, offset - l)
+ else:
+ da = oangle
+ while da < aangle + wangle / 2:
+ cangle = self.start_angle + da * afactor
+ x = self.radius * cos(cangle / 180 * pi) + self.center[0]
+ y = self.radius * sin(cangle / 180 * pi) + self.center[1]
+ remain = (da - aangle) / 360 * L
+ yield((x, y), remain)
+ da += pangle
+
def offset(self, offset_x, offset_y):
self.center = (self.center[0] + offset_x, self.center[1] + offset_y)
self.start = (self.start[0] + offset_x, self.start[1] + offset_y)
@@ -296,36 +215,30 @@ class DxfPolylineStatement(DxfStatement):
else:
self.end = (self.entity.points[-1][0], self.entity.points[-1][1])
- def to_gerber(self, settings=FileSettings(), pitch=0, width=0):
- if pitch:
- return
- 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 disassemble(self):
+ class Item:
+ pass
+
def ptseq():
for i in range(1, len(self.entity.points)):
yield i
if self.entity.is_closed:
yield 0
-
+
+ x0 = self.entity.points[0][0]
+ y0 = self.entity.points[0][1]
+ b = self.entity.bulge[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),
- )
+ item = Item()
+ item.dxftype = 'LINE'
+ item.start = (x0, y0)
+ item.end = (x1, y1)
+ item.is_closed = False
+ yield DxfLineStatement.from_entity(item)
else:
ang = 4 * atan(b)
xm = x0 + x1
@@ -334,24 +247,27 @@ class DxfPolylineStatement(DxfStatement):
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)
- )
+ rx0 = x0 - xc
+ ry0 = y0 - yc
+ rc = max(min(rx0 / r, 1.0), -1.0)
+ start_angle = acos(rc) if ry0 > 0 else 2 * pi - acos(rc)
+ start_angle *= 180 / pi
+ end_angle = start_angle + ang * 180 / pi
+
+ item = Item()
+ item.dxftype = 'ARC'
+ item.start = (x0, y0)
+ item.end = (x1, y1)
+ item.start_angle = start_angle
+ item.end_angle = end_angle
+ item.radius = r
+ item.center = (xc, yc)
+ item.is_closed = end_angle - start_angle >= 360
+ yield DxfArcStatement(item)
x0 = x1
y0 = y1
b = self.entity.bulge[idx]
-
- return gerber
def to_inch(self):
self.start = (inch(self.start[0]), inch(self.start[1]))
@@ -376,7 +292,6 @@ class DxfPolylineStatement(DxfStatement):
for idx in range(len(self.entity.points)):
self.entity.points[idx] = rotate_point(self.entity.points[idx], angle, center)
-
class DxfStatements(object):
def __init__(self, statements, units, dcode=10, draw_mode=None):
if draw_mode == None:
@@ -388,7 +303,7 @@ class DxfStatements(object):
self.width = 0
self.error_range = inch(ACCEPTABLE_ERROR) if self._units == 'inch' else ACCEPTABLE_ERROR
self.statements = statements
- self.paths = generate_closed_paths(self.statements, self.error_range)
+ self.close_paths, self.open_paths = generate_paths(self.statements, self.error_range)
@property
def units(self):
@@ -401,58 +316,62 @@ class DxfStatements(object):
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)
- for path in self.paths:
+ for path in self.close_paths:
yield path.to_gerber(settings)
yield 'G37*'
else:
- for statement in self.statements:
- yield statement.to_gerber(
- settings,
- pitch=self.pitch if self.draw_mode == DxfFile.DM_MOUSE_BITES else 0,
- width=self.width)
+ pitch = self.pitch if self.draw_mode == DxfFile.DM_MOUSE_BITES else 0
+ for path in self.open_paths:
+ yield path.to_gerber(settings, pitch=pitch, width=self.width)
+ for path in self.close_paths:
+ yield path.to_gerber(settings, pitch=pitch, width=self.width)
return '\n'.join(gerbers())
def to_excellon(self, settings=FileSettings()):
- if not self.draw_mode == DxfFile.DM_MOUSE_BITES:
+ if self.draw_mode == DxfFile.DM_FILL:
return
def drills():
- for statement in self.statements:
- if isinstance(statement, DxfLineStatement):
- yield statement.to_excellon(settings, pitch=self.pitch, width=self.width)
+ pitch = self.pitch if self.draw_mode == DxfFile.DM_MOUSE_BITES else 0
+ for path in self.open_paths:
+ yield path.to_excellon(settings, pitch=pitch, width=self.width)
+ for path in self.close_paths:
+ yield path.to_excellon(settings, pitch=pitch, width=self.width)
return '\n'.join(drills())
def to_inch(self):
if self._units == 'metric':
self._units = 'inch'
self.pitch = inch(self.pitch)
+ self.width = inch(self.width)
self.error_range = inch(self.error_range)
- for statement in self.statements:
- statement.to_inch()
- for path in self.paths:
+ for path in self.open_paths:
+ path.to_inch()
+ for path in self.close_paths:
path.to_inch()
def to_metric(self):
if self._units == 'inch':
self._units = 'metric'
self.pitch = metric(self.pitch)
+ self.width = metric(self.width)
self.error_range = metric(self.error_range)
- for statement in self.statements:
- statement.to_metric()
- for path in self.paths:
+ for path in self.open_paths:
+ path.to_metric()
+ for path in self.close_paths:
path.to_metric()
def offset(self, offset_x, offset_y):
- for statement in self.statements:
- statement.offset(offset_x, offset_y)
+ for path in self.open_paths:
+ path.offset(offset_x, offset_y)
+ for path in self.close_paths:
+ path.offset(offset_x, offset_y)
def rotate(self, angle, center=(0, 0)):
- for statement in self.statements:
- statement.rotate(angle, center)
+ for path in self.open_paths:
+ path.rotate(angle, center)
+ for path in self.close_paths:
+ path.rotate(angle, center)
class DxfFile(CamFile):
DM_LINE = 0
@@ -483,7 +402,7 @@ class DxfFile(CamFile):
elif entity.dxftype == 'LINE':
statements.append(DxfLineStatement.from_entity(entity))
elif entity.dxftype == 'CIRCLE':
- statements.append(DxfCircleStatement(entity))
+ statements.append(DxfArcStatement(entity))
elif entity.dxftype == 'ARC':
statements.append(DxfArcStatement(entity))
@@ -513,6 +432,10 @@ class DxfFile(CamFile):
self._draw_mode = draw_mode
self.aperture = ADParamStmt.circle(dcode=10, diameter=0.0)
+ if settings.units == 'inch':
+ self.aperture.to_inch()
+ else:
+ self.aperture.to_metric()
self.statements = DxfStatements(
statements, self.units, dcode=self.aperture.d, draw_mode=self.draw_mode)