added an optional "reverse" parameter to all postprocessors

git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@703 bbaffbd6-741e-11dd-a85d-61de82d9cad9

src/pycam/PathProcessors/ContourCutter.py

@@ -24,12 +24,13 @@ from pycam.Geometry.PolygonExtractor import PolygonExtractor
 from pycam.Toolpath import simplify_toolpath
 
 class ContourCutter:
-    def __init__(self):
+    def __init__(self, reverse=False):
         self.paths = []
         self.curr_path = None
         self.scanline = None
         self.pe = None
         self.points = []
+        self.reverse = reverse
 
     def append(self, p):
         self.points.append(p)
@@ -65,6 +66,8 @@ class ContourCutter:
                 p.append(p.points[0])
                 simplify_toolpath(p)
         if paths:
+            if self.reverse:
+                paths.reverse()
             self.paths.extend(paths)
         self.pe = None
 

src/pycam/PathProcessors/PathAccumulator.py

@@ -26,11 +26,12 @@ from pycam.Geometry.Path import Path
 
 
 class PathAccumulator:
-    def __init__(self, zigzag=False):
+    def __init__(self, zigzag=False, reverse=False):
         self.paths = []
         self.curr_path = None
         self.zigzag = zigzag
         self.scanline = None
+        self.reverse = reverse
 
     def append(self, p):
         if self.curr_path == None:
@@ -53,6 +54,8 @@ class PathAccumulator:
         if self.curr_path:
             if self.zigzag and (self.scanline % 2 == 0):
                 self.curr_path.reverse()
+            if self.reverse:
+                self.curr_path.reverse()
             simplify_toolpath(self.curr_path)
             self.paths.append(self.curr_path)
             self.curr_path = None

src/pycam/PathProcessors/PolygonCutter.py

@@ -27,11 +27,12 @@ from pycam.Toolpath import simplify_toolpath
 
 
 class PolygonCutter:
-    def __init__(self):
+    def __init__(self, reverse=False):
         self.paths = []
         self.curr_path = None
         self.scanline = None
         self.pe = PolygonExtractor(PolygonExtractor.MONOTONE)
+        self.reverse = reverse
 
     def append(self, p):
         self.pe.append(p)
@@ -70,5 +71,7 @@ class PolygonCutter:
         if paths:
             for p in paths:
                 simplify_toolpath(p)
+                if self.reverse:
+                    p.reverse()
             self.paths.extend(paths)
 

src/pycam/PathProcessors/SimpleCutter.py

@@ -24,9 +24,10 @@ from pycam.Geometry.Path import Path
 from pycam.Toolpath import simplify_toolpath
 
 class SimpleCutter:
-    def __init__(self):
+    def __init__(self, reverse=False):
         self.paths = []
         self.curr_path = None
+        self.reverse = reverse
 
     def append(self, p):
         curr_path = None
@@ -39,6 +40,9 @@ class SimpleCutter:
         curr_path.append(p)
         if self.curr_path == None:
             simplify_toolpath(curr_path)
+            if self.reverse:
+                self.paths.insert(0, curr_path)
+            else:
                 self.paths.append(curr_path)
 
     def new_direction(self, direction):

src/pycam/PathProcessors/ZigZagCutter.py

@@ -24,11 +24,12 @@ from pycam.Geometry.Path import Path
 from pycam.Toolpath import simplify_toolpath
 
 class ZigZagCutter:
-    def __init__(self):
+    def __init__(self, reverse=False):
         self.paths = []
         self.curr_path = None
         self.scanline = None
         self.curr_scanline = None
+        self.reverse = reverse
 
     def append(self, p):
         curr_path = None
@@ -61,8 +62,11 @@ class ZigZagCutter:
     def end_scanline(self):
         for path in self.curr_scanline:
             simplify_toolpath(path)
+            if self.reverse:
+                path.reverse()
             self.paths.append(path)
         self.curr_scanline = None
 
     def finish(self):
         pass
+