minor refactoring

gerberex/dxf.py

@@ -120,7 +120,7 @@ class DxfArcStatement(DxfStatement):
             self.start = (self.center[0] + self.radius, self.center[1])
             self.end = self.start
             self.start_angle = 0
-            self.end_angle = -360
+            self.end_angle = 360
             self.is_closed = True
         elif entity.dxftype == 'ARC':
             self.start_angle = self.entity.start_angle

gerberex/dxf_path.py

@@ -202,20 +202,22 @@ class DxfPath(object):
     def to_excellon(self, settings=FileSettings(), pitch=0, width=0):
         from gerberex.dxf import DxfArcStatement
         if pitch == 0:
-            x, y = self.statements[0].start
+            x0, y0 = self.statements[0].start
             excellon = 'G00{0}\nM15\n'.format(
-                CoordinateStmtEx(x=x, y=y).to_excellon(settings))
+                CoordinateStmtEx(x=x0, y=y0).to_excellon(settings))
 
             for statement in self.statements:
-                x, y = statement.end
+                x0, y0 = statement.start
+                x1, y1 = statement.end
                 if isinstance(statement, DxfArcStatement):
-                    r = statement.radius
+                    i = statement.center[0] - x0
+                    j = statement.center[1] - y0
                     excellon += '{0}{1}\n'.format(
                         'G03' if statement.end_angle > statement.start_angle else 'G02',
-                        CoordinateStmtEx(x=x, y=y, radius=r).to_excellon(settings))
+                        CoordinateStmtEx(x=x1, y=y1, i=i, j=j).to_excellon(settings))
                 else:
                     excellon += 'G01{0}\n'.format(
-                        CoordinateStmtEx(x=x, y=y).to_excellon(settings))
+                        CoordinateStmtEx(x=x1, y=y1).to_excellon(settings))
             
             excellon += 'M16\nG05\n'
         else:

tests/expects/dxf_offset.gtl

@@ -36,6 +36,6 @@ X119171Y125107D01*
 G01*
 X119171Y100000D02*
 G75*
-G02*
+G03*
 X119171Y100000I-3000J0D01*
 M02*

tests/expects/dxf_rotate.gtl

@@ -36,6 +36,6 @@ X23162Y45543D01*
 G01*
 X31749Y21950D02*
 G75*
-G02*
+G03*
 X31749Y21950I-2819J-1026D01*
 M02*

tests/expects/dxf_save_fill.gtl

@@ -37,7 +37,7 @@ X9171Y75107D01*
 G01*
 X9171Y50000D02*
 G75*
-G02*
+G03*
 X9171Y50000I-3000J0D01*
 G37*
 M02*

tests/expects/dxf_save_line.gtl

@@ -36,6 +36,6 @@ X9171Y75107D01*
 G01*
 X9171Y50000D02*
 G75*
-G02*
+G03*
 X9171Y50000I-3000J0D01*
 M02*

tests/expects/dxf_to_inch.gtl

@@ -36,6 +36,6 @@ X3610Y29570D01*
 G01*
 X3610Y19685D02*
 G75*
-G02*
+G03*
 X3610Y19685I-1181J0D01*
 M02*