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authorjaseg <git@jaseg.de>2021-06-06 13:28:42 +0200
committerjaseg <git@jaseg.de>2021-06-06 13:28:42 +0200
commit889ea37d9b66cbfb7a61795c7750b9f4311faa3f (patch)
tree34db36bcdf0501445aaec30c845ed644537e638a /gerberex/dxf.py
parent5a5ba2b709f01b2100cd767a25a41737541ad53c (diff)
parent71c371ca680483aa9ef18d2998832460dd43abdf (diff)
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Graft pcb-tools-extension master onto gerbonara main
Diffstat (limited to 'gerberex/dxf.py')
-rw-r--r--gerberex/dxf.py796
1 files changed, 796 insertions, 0 deletions
diff --git a/gerberex/dxf.py b/gerberex/dxf.py
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--- /dev/null
+++ b/gerberex/dxf.py
@@ -0,0 +1,796 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright 2019 Hiroshi Murayama <opiopan@gmail.com>
+
+import io, sys
+from math import pi, cos, sin, tan, atan, atan2, acos, asin, sqrt
+import dxfgrabber
+from gerber.cam import CamFile, FileSettings
+from gerber.utils import inch, metric, write_gerber_value, rotate_point
+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_paths, judge_containment
+from gerberex.excellon import write_excellon_header
+from gerberex.rs274x import write_gerber_header
+
+ACCEPTABLE_ERROR = 0.001
+
+def _normalize_angle(start_angle, end_angle):
+ angle = end_angle - start_angle
+ if angle > 0:
+ start = start_angle % 360
+ else:
+ angle = -angle
+ start = end_angle % 360
+ angle = min(angle, 360)
+ start = start - 360 if start > 180 else start
+
+ regions = []
+ while angle > 0:
+ end = start + angle
+ if end <= 180:
+ regions.append((start * pi / 180, end * pi / 180))
+ angle = 0
+ else:
+ regions.append((start * pi / 180, pi))
+ angle = end - 180
+ start = -180
+ return regions
+
+def _intersections_of_line_and_circle(start, end, center, radius, error_range):
+ x1 = start[0] - center[0]
+ y1 = start[1] - center[1]
+ x2 = end[0] - center[0]
+ y2 = end[1] - center[1]
+
+ dx = x2 - x1
+ dy = y2 - y1
+ dr = sqrt(dx * dx + dy * dy)
+ D = x1 * y2 - x2 * y1
+
+ distance = abs(dy * x1 - dx * y1) / dr
+
+ D2 = D * D
+ dr2 = dr * dr
+ r2 = radius * radius
+ delta = r2 * dr2 - D2
+ if distance > radius - error_range and distance < radius + error_range:
+ delta = 0
+ if delta < 0:
+ return None
+
+ sqrt_D = sqrt(delta)
+ E_x = -dx * sqrt_D if dy < 0 else dx * sqrt_D
+ E_y = abs(dy) * sqrt_D
+
+ p1_x = (D * dy + E_x) / dr2
+ p2_x = (D * dy - E_x) / dr2
+ p1_y = (-D * dx + E_y) / dr2
+ p2_y = (-D * dx - E_y) / dr2
+
+ p1_angle = atan2(p1_y, p1_x)
+ p2_angle = atan2(p2_y, p2_x)
+ if dx == 0:
+ p1_t = (p1_y - y1) / dy
+ p2_t = (p2_y - y1) / dy
+ else:
+ p1_t = (p1_x - x1) / dx
+ p2_t = (p2_x - x1) / dx
+
+ if delta == 0:
+ return (
+ (p1_x + center[0], p1_y + center[1]),
+ None,
+ p1_angle, None,
+ p1_t, None
+ )
+ else:
+ return (
+ (p1_x + center[0], p1_y + center[1]),
+ (p2_x + center[0], p2_y + center[1]),
+ p1_angle, p2_angle,
+ p1_t, p2_t
+ )
+
+class DxfStatement(object):
+ def __init__(self, entity):
+ self.entity = entity
+ self.start = None
+ self.end = None
+ self.is_closed = False
+
+ def to_inch(self):
+ pass
+
+ def to_metric(self):
+ pass
+
+ def is_equal_to(self, target, error_range=0):
+ return False
+
+ def reverse(self):
+ raise Exception('Not implemented')
+
+ def offset(self, offset_x, offset_y):
+ raise Exception('Not supported')
+
+ def rotate(self, angle, center=(0, 0)):
+ raise Exception('Not supported')
+
+
+class DxfLineStatement(DxfStatement):
+ @classmethod
+ def from_entity(cls, entity):
+ start = (entity.start[0], entity.start[1])
+ end = (entity.end[0], entity.end[1])
+ return cls(entity, start, end)
+
+ @property
+ def bounding_box(self):
+ return (min(self.start[0], self.end[0]),
+ min(self.start[1], self.end[1]),
+ max(self.start[0], self.end[0]),
+ max(self.start[1], self.end[1]))
+
+ def __init__(self, entity, start, end):
+ super(DxfLineStatement, self).__init__(entity)
+ self.start = start
+ self.end = end
+
+ def to_inch(self):
+ self.start = (
+ inch(self.start[0]), inch(self.start[1]))
+ self.end = (
+ inch(self.end[0]), inch(self.end[1]))
+
+ def to_metric(self):
+ self.start = (
+ metric(self.start[0]), metric(self.start[1]))
+ self.end = (
+ metric(self.end[0]), metric(self.end[1]))
+
+ def is_equal_to(self, target, error_range=0):
+ if not isinstance(target, DxfLineStatement):
+ return False
+ return (is_equal_point(self.start, target.start, error_range) and \
+ is_equal_point(self.end, target.end, error_range)) or \
+ (is_equal_point(self.start, target.end, error_range) and \
+ is_equal_point(self.end, target.start, error_range))
+
+ def reverse(self):
+ pt = self.start
+ self.start = self.end
+ self.end = pt
+
+ def dots(self, pitch, width, offset=0):
+ x0, y0 = self.start
+ x1, y1 = self.end
+ y1 = self.end[1]
+ xp = x1 - x0
+ yp = y1 - y0
+ l = sqrt(xp * xp + yp * yp)
+ xd = xp * pitch / l
+ yd = yp * pitch / l
+ x0 += xp * offset / l
+ y0 += yp * offset / l
+
+ 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)
+ self.end = (self.end[0] + offset_x, self.end[1] + offset_y)
+
+ def rotate(self, angle, center=(0, 0)):
+ self.start = rotate_point(self.start, angle, center)
+ self.end = rotate_point(self.end, angle, center)
+
+ def intersections_with_halfline(self, point_from, point_to, error_range):
+ denominator = (self.end[0] - self.start[0]) * (point_to[1] - point_from[1]) - \
+ (self.end[1] - self.start[1]) * (point_to[0] - point_from[0])
+ de = error_range * error_range
+ if denominator >= -de and denominator <= de:
+ return []
+ from_dx = point_from[0] - self.start[0]
+ from_dy = point_from[1] - self.start[1]
+ r = ((point_to[1] - point_from[1]) * from_dx -
+ (point_to[0] - point_from[0]) * from_dy) / denominator
+ s = ((self.end[1] - self.start[1]) * from_dx -
+ (self.end[0] - self.start[0]) * from_dy) / denominator
+ dx = (self.end[0] - self.start[0])
+ dy = (self.end[1] - self.start[1])
+ le = error_range / sqrt(dx * dx + dy * dy)
+ if s < 0 or r < -le or r > 1 + le:
+ return []
+
+ pt = (self.start[0] + (self.end[0] - self.start[0]) * r,
+ self.start[1] + (self.end[1] - self.start[1]) * r)
+ if is_equal_point(pt, self.start, error_range):
+ return []
+ else:
+ return [pt]
+
+ def intersections_with_arc(self, center, radius, angle_regions, error_range):
+ intersection = \
+ _intersections_of_line_and_circle(self.start, self.end, center, radius, error_range)
+ if intersection is None:
+ return []
+ else:
+ p1, p2, p1_angle, p2_angle, p1_t, p2_t = intersection
+
+ pts = []
+ if p1_t >= 0 and p1_t <= 1:
+ for region in angle_regions:
+ if p1_angle >= region[0] and p1_angle <= region[1]:
+ pts.append(p1)
+ break
+ if p2 is not None and p2_t >= 0 and p2_t <= 1:
+ for region in angle_regions:
+ if p2_angle >= region[0] and p2_angle <= region[1]:
+ pts.append(p2)
+ break
+
+ return pts
+
+class DxfArcStatement(DxfStatement):
+ def __init__(self, entity):
+ super(DxfArcStatement, self).__init__(entity)
+ 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')
+ self.angle_regions = _normalize_angle(self.start_angle, self.end_angle)
+
+ @property
+ def bounding_box(self):
+ return (self.center[0] - self.radius, self.center[1] - self.radius,
+ self.center[0] + self.radius, self.center[1] + self.radius)
+
+ def to_inch(self):
+ self.radius = inch(self.radius)
+ self.center = (inch(self.center[0]), inch(self.center[1]))
+ self.start = (inch(self.start[0]), inch(self.start[1]))
+ self.end = (inch(self.end[0]), inch(self.end[1]))
+
+ def to_metric(self):
+ self.radius = metric(self.radius)
+ self.center = (metric(self.center[0]), metric(self.center[1]))
+ self.start = (metric(self.start[0]), metric(self.start[1]))
+ self.end = (metric(self.end[0]), metric(self.end[1]))
+
+ def is_equal_to(self, target, error_range=0):
+ if not isinstance(target, DxfArcStatement):
+ return False
+ aerror_range = error_range / pi * self.radius * 180
+ return is_equal_point(self.center, target.center, error_range) and \
+ is_equal_value(self.radius, target.radius, error_range) and \
+ ((is_equal_value(self.start_angle, target.start_angle, aerror_range) and
+ is_equal_value(self.end_angle, target.end_angle, aerror_range)) or
+ (is_equal_value(self.start_angle, target.end_angle, aerror_range) and
+ is_equal_value(self.end_angle, target.end_angle, aerror_range)))
+
+ def reverse(self):
+ tmp = self.start_angle
+ self.start_angle = self.end_angle
+ self.end_angle = tmp
+ tmp = self.start
+ 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)
+ self.end = (self.end[0] + offset_x, self.end[1] + offset_y)
+
+ def rotate(self, angle, center=(0, 0)):
+ self.start_angle += angle
+ self.end_angle += angle
+ self.center = rotate_point(self.center, angle, center)
+ self.start = rotate_point(self.start, angle, center)
+ self.end = rotate_point(self.end, angle, center)
+ self.angle_regions = _normalize_angle(self.start_angle, self.end_angle)
+
+ def intersections_with_halfline(self, point_from, point_to, error_range):
+ intersection = \
+ _intersections_of_line_and_circle(
+ point_from, point_to, self.center, self.radius, error_range)
+ if intersection is None:
+ return []
+ else:
+ p1, p2, p1_angle, p2_angle, p1_t, p2_t = intersection
+
+ if is_equal_point(p1, self.start, error_range):
+ p1 = None
+ elif p2 is not None and is_equal_point(p2, self.start, error_range):
+ p2 = None
+
+ def is_contained(angle, region, error):
+ if angle >= region[0] - error and angle <= region[1] + error:
+ return True
+ if angle < 0 and region[1] > 0:
+ angle = angle + 2 * pi
+ elif angle > 0 and region[0] < 0:
+ angle = angle - 2 * pi
+ return angle >= region[0] - error and angle <= region[1] + error
+
+ aerror = error_range * self.radius
+ pts = []
+ if p1 is not None and p1_t >= 0 and not is_equal_point(p1, self.start, error_range):
+ for region in self.angle_regions:
+ if is_contained(p1_angle, region, aerror):
+ pts.append(p1)
+ break
+ if p2 is not None and p2_t >= 0 and not is_equal_point(p2, self.start, error_range):
+ for region in self.angle_regions:
+ if is_contained(p2_angle, region, aerror):
+ pts.append(p2)
+ break
+
+ return pts
+
+ def intersections_with_arc(self, center, radius, angle_regions, error_range):
+ x1 = center[0] - self.center[0]
+ y1 = center[1] - self.center[1]
+ r1 = self.radius
+ r2 = radius
+ cd_sq = x1 * x1 + y1 * y1
+ cd = sqrt(cd_sq)
+ rd = abs(r1 - r2)
+
+ if (cd >= 0 and cd <= rd) or cd >= r1 + r2:
+ return []
+
+ A = (cd_sq + r1 * r1 - r2 * r2) / 2
+ scale = sqrt(cd_sq * r1 * r1 - A * A) / cd_sq
+ xl = A * x1 / cd_sq
+ xr = y1 * scale
+ yl = A * y1 / cd_sq
+ yr = x1 * scale
+
+ pt1_x = xl + xr
+ pt1_y = yl - yr
+ pt2_x = xl - xr
+ pt2_y = yl + yr
+ pt1_angle1 = atan2(pt1_y, pt1_x)
+ pt1_angle2 = atan2(pt1_y - y1, pt1_x - x1)
+ pt2_angle1 = atan2(pt2_y, pt2_x)
+ pt2_angle2 = atan2(pt2_y - y1, pt2_x - x1)
+
+ aerror = error_range * self.radius
+ pts=[]
+ for region in self.angle_regions:
+ if pt1_angle1 >= region[0] and pt1_angle1 <= region[1]:
+ for region in angle_regions:
+ if pt1_angle2 >= region[0] - aerror and pt1_angle2 <= region[1] + aerror:
+ pts.append((pt1_x + self.center[0], pt1_y + self.center[1]))
+ break
+ break
+ for region in self.angle_regions:
+ if pt2_angle1 >= region[0] and pt2_angle1 <= region[1]:
+ for region in angle_regions:
+ if pt2_angle2 >= region[0] - aerror and pt2_angle2 <= region[1] + aerror:
+ pts.append((pt2_x + self.center[0], pt2_y + self.center[1]))
+ break
+ break
+ return pts
+
+class DxfPolylineStatement(DxfStatement):
+ def __init__(self, entity):
+ super(DxfPolylineStatement, self).__init__(entity)
+ self.start = (self.entity.points[0][0], self.entity.points[0][1])
+ self.is_closed = self.entity.is_closed
+ if self.is_closed:
+ self.end = self.start
+ else:
+ self.end = (self.entity.points[-1][0], self.entity.points[-1][1])
+
+ 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:
+ 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
+ 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))
+ 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]
+
+ def to_inch(self):
+ self.start = (inch(self.start[0]), inch(self.start[1]))
+ self.end = (inch(self.end[0]), inch(self.end[1]))
+ 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]))
+
+ def to_metric(self):
+ self.start = (metric(self.start[0]), metric(self.start[1]))
+ self.end = (metric(self.end[0]), metric(self.end[1]))
+ 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]))
+
+ def offset(self, offset_x, offset_y):
+ for idx in range(len(self.entity.points)):
+ self.entity.points[idx] = (
+ self.entity.points[idx][0] + offset_x, self.entity.points[idx][1] + offset_y)
+
+ def rotate(self, angle, center=(0, 0)):
+ 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, fill_mode=None):
+ if draw_mode is None:
+ draw_mode = DxfFile.DM_LINE
+ if fill_mode is None:
+ fill_mode = DxfFile.FM_TURN_OVER
+ self._units = units
+ self.dcode = dcode
+ self.draw_mode = draw_mode
+ self.fill_mode = fill_mode
+ self.pitch = inch(1) if self._units == 'inch' else 1
+ self.width = 0
+ self.error_range = inch(ACCEPTABLE_ERROR) if self._units == 'inch' else ACCEPTABLE_ERROR
+ self.statements = list(filter(
+ lambda i: not (isinstance(i, DxfLineStatement) and \
+ is_equal_point(i.start, i.end, self.error_range)),
+ statements
+ ))
+ self.close_paths, self.open_paths = generate_paths(self.statements, self.error_range)
+ self.sorted_close_paths = []
+ self.polarity = True # True means dark, False means clear
+
+ @property
+ def units(self):
+ return _units
+
+ def _polarity_command(self, polarity=None):
+ if polarity is None:
+ polarity = self.polarity
+ return '%LPD*%' if polarity else '%LPC*%'
+
+ def _prepare_sorted_close_paths(self):
+ if self.sorted_close_paths:
+ return
+ for i in range(0, len(self.close_paths)):
+ for j in range(i + 1, len(self.close_paths)):
+ containee, container = judge_containment(
+ self.close_paths[i], self.close_paths[j], self.error_range)
+ if containee is not None:
+ containee.containers.append(container)
+ self.sorted_close_paths = sorted(self.close_paths, key=lambda path: len(path.containers))
+
+ def to_gerber(self, settings=FileSettings()):
+ def gerbers():
+ yield 'G75*'
+ yield self._polarity_command()
+ yield 'D{0}*'.format(self.dcode)
+ if self.draw_mode == DxfFile.DM_FILL:
+ yield 'G36*'
+ if self.fill_mode == DxfFile.FM_TURN_OVER:
+ self._prepare_sorted_close_paths()
+ polarity = self.polarity
+ level = 0
+ for path in self.sorted_close_paths:
+ if len(path.containers) > level:
+ level = len(path.containers)
+ polarity = not polarity
+ yield 'G37*'
+ yield self._polarity_command(polarity)
+ yield 'G36*'
+ yield path.to_gerber(settings)
+ else:
+ for path in self.close_paths:
+ yield path.to_gerber(settings)
+ yield 'G37*'
+ else:
+ 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 self.draw_mode == DxfFile.DM_FILL:
+ return
+ def drills():
+ 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 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 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 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 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
+ DM_FILL = 1
+ DM_MOUSE_BITES = 2
+
+ FM_SIMPLE = 0
+ FM_TURN_OVER = 1
+
+ FT_RX274X = 0
+ FT_EXCELLON = 1
+
+ @classmethod
+ def from_dxf(cls, dxf, settings=None, draw_mode=None, filename=None):
+ fsettings = settings if settings else \
+ FileSettings(zero_suppression='leading')
+
+ if dxf.header['$INSUNITS'] == 1:
+ fsettings.units = 'inch'
+ if not settings:
+ fsettings.format = (2, 5)
+ else:
+ fsettings.units = 'metric'
+ if not settings:
+ fsettings.format = (3, 4)
+
+ statements = []
+ for entity in dxf.entities:
+ if entity.dxftype == 'LWPOLYLINE':
+ statements.append(DxfPolylineStatement(entity))
+ elif entity.dxftype == 'LINE':
+ statements.append(DxfLineStatement.from_entity(entity))
+ elif entity.dxftype == 'CIRCLE':
+ statements.append(DxfArcStatement(entity))
+ elif entity.dxftype == 'ARC':
+ statements.append(DxfArcStatement(entity))
+
+ return cls(statements, fsettings, draw_mode, filename)
+
+ @classmethod
+ def rectangle(cls, width, height, left=0, bottom=0, units='metric', draw_mode=None, filename=None):
+ if units == 'metric':
+ settings = FileSettings(units=units, zero_suppression='leading', format=(3,4))
+ else:
+ settings = FileSettings(units=units, zero_suppression='leading', format=(2,5))
+ statements = [
+ DxfLineStatement(None, (left, bottom), (left + width, bottom)),
+ DxfLineStatement(None, (left + width, bottom), (left + width, bottom + height)),
+ DxfLineStatement(None, (left + width, bottom + height), (left, bottom + height)),
+ DxfLineStatement(None, (left, bottom + height), (left, bottom)),
+ ]
+ return cls(statements, settings, draw_mode, filename)
+
+ def __init__(self, statements, settings=None, draw_mode=None, filename=None):
+ if not settings:
+ settings = FileSettings(units='metric', format=(3,4), zero_suppression='leading')
+ if draw_mode == None:
+ draw_mode = self.DM_LINE
+
+ super(DxfFile, self).__init__(settings=settings, filename=filename)
+ self._draw_mode = draw_mode
+ self._fill_mode = self.FM_TURN_OVER
+
+ 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, fill_mode=self.filename)
+
+ @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),],)
+ self.statements.width = 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
+
+ @property
+ def fill_mode(self):
+ return self._fill_mode
+
+ @fill_mode.setter
+ def fill_mode(self, value):
+ self._fill_mode = value
+ self.statements.fill_mode = value
+
+ @property
+ def pitch(self):
+ return self.statements.pitch
+
+ @pitch.setter
+ def pitch(self, value):
+ self.statements.pitch = value
+
+ def write(self, filename=None, filetype=FT_RX274X):
+ self.settings.notation = 'absolute'
+ self.settings.zeros = 'trailing'
+ filename = filename if filename is not None else self.filename
+ with open(filename, 'w') as f:
+ if filetype == self.FT_RX274X:
+ write_gerber_header(f, self.settings)
+ f.write(self.aperture.to_gerber(self.settings) + '\n')
+ f.write(self.statements.to_gerber(self.settings) + '\n')
+ f.write('M02*\n')
+ else:
+ tools = [ExcellonTool(self.settings, number=1, diameter=self.width)]
+ write_excellon_header(f, self.settings, tools)
+ f.write('T01\n')
+ f.write(self.statements.to_excellon(self.settings) + '\n')
+ f.write('M30\n')
+
+
+ def to_inch(self):
+ if self.units == 'metric':
+ self.aperture.to_inch()
+ self.statements.to_inch()
+ self.pitch = inch(self.pitch)
+ self.units = 'inch'
+
+ def to_metric(self):
+ if self.units == 'inch':
+ self.aperture.to_metric()
+ self.statements.to_metric()
+ self.pitch = metric(self.pitch)
+ self.units = 'metric'
+
+ def offset(self, offset_x, offset_y):
+ self.statements.offset(offset_x, offset_y)
+
+ def rotate(self, angle, center=(0, 0)):
+ self.statements.rotate(angle, center)
+
+ def negate_polarity(self):
+ self.statements.polarity = not self.statements.polarity
+
+def loads(data, filename=None):
+ if sys.version_info.major == 2:
+ data = unicode(data)
+ stream = io.StringIO(data)
+ dxf = dxfgrabber.read(stream)
+ return DxfFile.from_dxf(dxf)