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1 files changed, 357 insertions, 0 deletions

diff --git a/gerberex/dxf.py b/gerberex/dxf.py
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+++ b/gerberex/dxf.py
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+#!/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' if deg0 > deg1 else '02',
+            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)