DRC doc

src/doc/doc/about/drc_ref_drc.xml

@@ -453,6 +453,7 @@ out = in.drc(covering(other) > 2)
 <p>Usage:</p>
 <ul>
 <li><tt>expression.edges</tt></li>
+<li><tt>expression.edges(mode)</tt></li>
 </ul>
 <p>
 Polygons will be separated into edges forming their contours. Edge pairs will be 
@@ -466,6 +467,20 @@ for the edges:
 <pre>
 out = in.drc(primary.edges)
 </pre>
+</p><p>
+The "mode" argument allows selecting specific edges from polygons.
+Allowed values are: "convex", "concave", "step", "step_in" and "step_out".
+"step" generates edges only if they provide a step between two other
+edges. "step_in" creates edges that make a step towards the inside of
+the polygon and "step_out" creates edges that make a step towards the
+outside:
+</p><p>
+<pre>
+out = in.drc(primary.edges(convex))
+</pre>
+</p><p>
+The mode argument is ignored when translating other objects than
+polygons.
 </p>
 <a name="end_segments"/><h2>"end_segments" - Returns the part at the end of each edge of the input</h2>
 <keyword name="end_segments"/>

src/doc/doc/about/drc_ref_layer.xml

@@ -783,6 +783,11 @@ apply to this method.
 </ul>
 <a name="edges"/><h2>"edges" - Decomposes the layer into single edges</h2>
 <keyword name="edges"/>
+<p>Usage:</p>
+<ul>
+<li><tt>layer.edges</tt></li>
+<li><tt>layer.edges(mode)</tt></li>
+</ul>
 <p>
 Edge pair collections are decomposed into the individual edges that make up
 the edge pairs. Polygon layers are decomposed into the edges making up the 
@@ -791,6 +796,36 @@ is called on.
 </p><p>
 Merged semantics applies, i.e. the result reflects merged polygons rather than
 individual ones unless raw mode is chosen.
+</p><p>
+The "mode" argument allows selecting specific edges from polygons.
+Allowed values are: "convex", "concave", "step", "step_in" and "step_out".
+"step" generates edges only if they provide a step between two other
+edges. "step_in" creates edges that make a step towards the inside of
+the polygon and "step_out" creates edges that make a step towards the
+outside:
+</p><p>
+<pre>
+out = in.edges(convex)
+</pre>
+</p><p>
+This feature is only available for polygon layers.
+</p><p>
+The following images show the effect of the mode argument:
+</p><p>
+<table>
+<tr>
+<td><img src="/images/drc_edge_modes1.png"/></td>
+<td><img src="/images/drc_edge_modes2.png"/></td>
+</tr>
+<tr>
+<td><img src="/images/drc_edge_modes3.png"/></td>
+<td><img src="/images/drc_edge_modes4.png"/></td>
+</tr>
+<tr>
+<td><img src="/images/drc_edge_modes5.png"/></td>
+<td><img src="/images/drc_edge_modes6.png"/></td>
+</tr>
+</table>
 </p>
 <a name="edges?"/><h2>"edges?" - Returns true, if the layer is an edge layer</h2>
 <keyword name="edges?"/>

src/doc/docDRCLVSResources.qrc

@@ -54,6 +54,12 @@
   <file alias="drc_extended2.png">doc/images/drc_extended2.png</file>
   <file alias="drc_extended3.png">doc/images/drc_extended3.png</file>
   <file alias="drc_extended4.png">doc/images/drc_extended4.png</file>
+  <file alias="drc_edge_modes1.png">doc/images/drc_edge_modes1.png</file>
+  <file alias="drc_edge_modes2.png">doc/images/drc_edge_modes2.png</file>
+  <file alias="drc_edge_modes3.png">doc/images/drc_edge_modes3.png</file>
+  <file alias="drc_edge_modes4.png">doc/images/drc_edge_modes4.png</file>
+  <file alias="drc_edge_modes5.png">doc/images/drc_edge_modes5.png</file>
+  <file alias="drc_edge_modes6.png">doc/images/drc_edge_modes6.png</file>
   <file alias="drc_extents1.png">doc/images/drc_extents1.png</file>
   <file alias="drc_extents2.png">doc/images/drc_extents2.png</file>
   <file alias="drc_inside.png">doc/images/drc_inside.png</file>

src/drc/drc/built-in-macros/_drc_complex_ops.rb

@@ -1004,11 +1004,11 @@ CODE
   # @/code
   #
   # The "mode" argument allows selecting specific edges from polygons.
-  # Allows values are: "convex", "concave", "step", "step_in" and "step_out".
-  # "step" generates edges only that provide a step between two other
+  # Allowed values are: "convex", "concave", "step", "step_in" and "step_out".
+  # "step" generates edges only if they provide a step between two other
   # edges. "step_in" creates edges that make a step towards the inside of
   # the polygon and "step_out" creates edges that make a step towards the
-  # outside (hull contours in clockwise orientation, holes counterclockwise):
+  # outside:
   #
   # @code
   # out = in.drc(primary.edges(convex))

src/drc/drc/built-in-macros/_drc_layer.rb

@@ -3399,17 +3399,34 @@ CODE
     # individual ones unless raw mode is chosen.
     #
     # The "mode" argument allows selecting specific edges from polygons.
-    # Allows values are: "convex", "concave", "step", "step_in" and "step_out".
-    # "step" generates edges only that provide a step between two other
+    # Allowed values are: "convex", "concave", "step", "step_in" and "step_out".
+    # "step" generates edges only if they provide a step between two other
     # edges. "step_in" creates edges that make a step towards the inside of
     # the polygon and "step_out" creates edges that make a step towards the
-    # outside (hull contours in clockwise orientation, holes counterclockwise):
+    # outside:
     #
     # @code
     # out = in.edges(convex)
     # @/code
     #
     # This feature is only available for polygon layers.
+    #
+    # The following images show the effect of the mode argument:
+    #
+    # @table
+    #   @tr 
+    #     @td @img(/images/drc_edge_modes1.png) @/td
+    #     @td @img(/images/drc_edge_modes2.png) @/td
+    #   @/tr
+    #   @tr 
+    #     @td @img(/images/drc_edge_modes3.png) @/td
+    #     @td @img(/images/drc_edge_modes4.png) @/td
+    #   @/tr
+    #   @tr 
+    #     @td @img(/images/drc_edge_modes5.png) @/td
+    #     @td @img(/images/drc_edge_modes6.png) @/td
+    #   @/tr
+    # @/table
     
     %w(edges).each do |f| 
       eval <<"CODE"