diff options
Diffstat (limited to 'gerberex/dxf.py')
| -rw-r--r-- | gerberex/dxf.py | 198 |
1 files changed, 145 insertions, 53 deletions
diff --git a/gerberex/dxf.py b/gerberex/dxf.py index a2c26d0..e6eb971 100644 --- a/gerberex/dxf.py +++ b/gerberex/dxf.py @@ -5,16 +5,29 @@ import io 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 from gerber.gerber_statements import ADParamStmt from gerber.excellon_statements import ExcellonTool from gerber.excellon_statements import CoordinateStmt -import dxfgrabber +from gerberex.dxf_path import generate_closed_paths + +ACCEPTABLE_ERROR = 0.001 + +def is_equal_value(a, b, error_range=0): + return a - b <= error_range and a - b >= -error_range + +def is_equal_point(a, b, error_range=0): + return is_equal_value(a[0], b[0], error_range) and \ + is_equal_value(a[1], b[1], error_range) class DxfStatement(object): def __init__(self, entity): self.entity = entity + self.start = None + self.end = None + self.is_closed = False def to_gerber(self, settings=None, pitch=0, width=0): pass @@ -28,16 +41,22 @@ class DxfStatement(object): def to_metric(self): pass + def is_equal_to(self, target, error_range=0): + return False + + def reverse(self): + raise Exception('Not implemented') + class DxfLineStatement(DxfStatement): def __init__(self, entity): super(DxfLineStatement, self).__init__(entity) + self.start = (self.entity.start[0], self.entity.start[1]) + self.end = (self.entity.end[0], self.entity.end[1]) def to_gerber(self, settings=FileSettings(), pitch=0, width=0): if pitch == 0: - x0 = self.entity.start[0] - y0 = self.entity.start[1] - x1 = self.entity.end[0] - y1 = self.entity.end[1] + 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), @@ -67,22 +86,34 @@ class DxfLineStatement(DxfStatement): return gstr def to_inch(self): - self.entity.start = ( - inch(self.entity.start[0]), inch(self.entity.start[1])) - self.entity.end = ( - inch(self.entity.end[0]), inch(self.entity.end[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.entity.start = ( - metric(self.entity.start[0]), inch(self.entity.start[1])) - self.entity.end = ( - metric(self.entity.end[0]), inch(self.entity.end[1])) + self.start = ( + metric(self.start[0]), inch(self.start[1])) + self.end = ( + metric(self.end[0]), inch(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): - x0 = self.entity.start[0] - y0 = self.entity.start[1] - x1 = self.entity.end[0] - y1 = self.entity.end[1] + x0, y0 = self.start + x1, y1 = self.end + y1 = self.end[1] xp = x1 - x0 yp = y1 - y0 l = sqrt(xp * xp + yp * yp) @@ -99,13 +130,17 @@ class DxfLineStatement(DxfStatement): 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.entity.radius - x0 = self.entity.center[0] - y0 = self.entity.center[1] + 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, @@ -124,66 +159,107 @@ class DxfCircleStatement(DxfStatement): ) def to_inch(self): - self.entity.radius = inch(self.entity.radius) - self.entity.center = ( - inch(self.entity.center[0]), inch(self.entity.center[1])) + self.radius = inch(self.radius) + self.center = ( + inch(self.center[0]), inch(self.center[1])) def to_metric(self): - self.entity.radius = metric(self.entity.radius) - self.entity.center = ( - metric(self.entity.center[0]), metric(self.entity.center[1])) + 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 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 - 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) + 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(begin_x, settings.format, + write_gerber_value(start_x, settings.format, settings.zero_suppression), - write_gerber_value(begin_y, settings.format, + write_gerber_value(start_y, settings.format, settings.zero_suppression), - '03', + '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 - begin_x, settings.format, + write_gerber_value(x0 - start_x, settings.format, settings.zero_suppression), - write_gerber_value(y0 - begin_y, settings.format, + write_gerber_value(y0 - start_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 = ( - inch(self.entity.center[0]), inch(self.entity.center[1])) + 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.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 = ( - metric(self.entity.center[0]), metric(self.entity.center[1])) + 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 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.start = (self.entity.points[-1][0], self.entity.points[-1][1]) def to_gerber(self, settings=FileSettings(), pitch=0, width=0): if pitch: @@ -243,12 +319,16 @@ class DxfPolylineStatement(DxfStatement): return gerber 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])) self.entity.bulge[idx] = inch(self.entity.bulge[idx]) 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])) @@ -261,8 +341,9 @@ class DxfStatements(object): self._units = units self.dcode = dcode self.draw_mode = draw_mode - self.pitch = inch(1) if self._units == 'unit' else 1 + 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 = [] for entity in entities: if entity.dxftype == 'LWPOLYLINE': @@ -273,6 +354,7 @@ class DxfStatements(object): self.statements.append(DxfCircleStatement(entity)) elif entity.dxftype == 'ARC': self.statements.append(DxfArcStatement(entity)) + self.paths = generate_closed_paths(self.statements, self.error_range) @property def units(self): @@ -282,12 +364,16 @@ class DxfStatements(object): def gerbers(): yield 'D{0}*'.format(self.dcode) if self.draw_mode == DxfFile.DM_FILL: - yield 'G36*' for statement in self.statements: + yield 'G36*' if isinstance(statement, DxfCircleStatement) or \ (isinstance(statement, DxfPolylineStatement) and statement.entity.is_closed): yield statement.to_gerber(settings) - yield 'G37*' + yield 'G37*' + for path in self.paths: + yield 'G36*' + yield path.to_gerber(settings) + yield 'G37*' else: for statement in self.statements: yield statement.to_gerber( @@ -310,15 +396,21 @@ class DxfStatements(object): if self._units == 'metric': self._units = 'inch' self.pitch = inch(self.pitch) + self.error_range = inch(self.error_range) for statement in self.statements: statement.to_inch() + for path in self.paths: + path.to_inch() def to_metric(self): if self._units == 'inch': self._units = 'metric' self.pitch = metric(self.pitch) + self.error_range = metric(self.error_range) for statement in self.statements: statement.to_metric() + for path in self.paths: + path.to_metric() class DxfHeaderStatement(object): def to_gerber(self, settings): |