fix a rotaion issue

4 files changed, 25 insertions, 11 deletions

diff --git a/gerberex/dxf.py b/gerberex/dxf.py
index 1b2ddf7..39d256b 100644
--- a/gerberex/dxf.py
+++ b/gerberex/dxf.py
@@ -11,17 +11,11 @@ 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
+from gerberex.utility import is_equal_point, is_equal_value
 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
diff --git a/gerberex/dxf_path.py b/gerberex/dxf_path.py
index 930d8d2..2825c58 100644
--- a/gerberex/dxf_path.py
+++ b/gerberex/dxf_path.py
@@ -5,6 +5,7 @@
 
 from gerber.utils import inch, metric, write_gerber_value
 from gerber.cam import FileSettings
+from gerberex.utility import is_equal_point, is_equal_value
 
 class DxfPath(object):
     def __init__(self, statement, error_range=0):
@@ -21,12 +22,10 @@ class DxfPath(object):
 
     @property
     def is_closed(self):
-        from gerberex.dxf import is_equal_point
         return len(self.statements) > 1 and \
                is_equal_point(self.start, self.end, self.error_range)
     
     def is_equal_to(self, target, error_range=0):
-        from gerberex.dxf import is_equal_point
         if not isinstance(target, DxfPath):
             return False
         if len(self.statements) != len(target.statements):
@@ -59,7 +58,6 @@ class DxfPath(object):
         self.statements = rlist
     
     def merge(self, element, error_range=0):
-        from gerberex.dxf import is_equal_point
         if self.is_closed or element.is_closed:
             return False
         if not error_range:
diff --git a/gerberex/rs274x.py b/gerberex/rs274x.py
index 4b477d3..4eb317d 100644
--- a/gerberex/rs274x.py
+++ b/gerberex/rs274x.py
@@ -30,11 +30,25 @@ class GerberFile(gerber.rs274x.GerberFile):
         if angle % 360 == 0:
             return
         self._generalize_aperture()
+        last_x = 0
+        last_y = 0
+        last_rx = 0
+        last_ry = 0
         for statement in self.statements:
             if isinstance(statement, AMParamStmtEx):
                 statement.rotate(angle, center)
             elif isinstance(statement, CoordStmt) and statement.x != None and statement.y != None:
-                statement.x, statement.y = rotate(statement.x, statement.y, angle, center)
+                if statement.i != None and statement.j != None:
+                    cx = last_x + statement.i
+                    cy = last_y + statement.j
+                    cx, cy = rotate(cx, cy, angle, center)
+                    statement.i = cx - last_rx
+                    statement.j = cy - last_ry
+                last_x = statement.x
+                last_y = statement.y
+                last_rx, last_ry = rotate(statement.x, statement.y, angle, center)
+                statement.x = last_rx
+                statement.y = last_ry
     
     def _generalize_aperture(self):
         RECTANGLE = 0
diff --git a/gerberex/utility.py b/gerberex/utility.py
index 852519a..f90df96 100644
--- a/gerberex/utility.py
+++ b/gerberex/utility.py
@@ -11,3 +11,11 @@ def rotate(x, y, angle, center):
     angle = angle * pi / 180.0
     return (cos(angle) * x0 - sin(angle) * y0 + center[0],
             sin(angle) * x0 + cos(angle) * y0 + center[1])
+
+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)