Linestring/polygon overlay, phase 6 (ring, counter clockwise)

[SVN r75574]

include/boost/geometry/algorithms/detail/overlay/follow.hpp

@@ -66,15 +66,10 @@ class follow
     {
         // (Blocked means: blocked for polygon/polygon intersection, because
         // they are reversed. But for polygon/line it is similar to continue)
-        switch(op.operation)
-        {
-            case operation_intersection : 
-            case operation_continue : 
-            case operation_blocked : 
-                return true;
-        }
-
-        return false;
+        return op.operation == operation_intersection
+            || op.operation == operation_continue
+            || op.operation == operation_blocked
+            ;
     }
 
     template <typename Turn, typename Operation>
@@ -105,12 +100,9 @@ class follow
             return false;
         }
 
-        switch(op.operation)
+        if (is_entering(turn, op))
         {
-            case operation_intersection : 
-            case operation_continue : 
-            case operation_blocked : 
-                return entered || (first && geometry::within(linestring[0], polygon));
+            return entered || (first && geometry::within(linestring[0], polygon));
         }
 
         return false;

include/boost/geometry/algorithms/detail/overlay/intersection_insert.hpp

@@ -105,11 +105,11 @@ struct intersection_linestring_linestring_point
 
 /*!
 \brief Version of linestring with an areal feature (polygon or multipolygon)
-\ingroup intersection
 */
 template
 <
     typename LineString, typename Areal,
+    bool ReverseAreal,
     typename OutputIterator, typename LineStringOut,
     typename Strategy
 >
@@ -150,7 +150,7 @@ struct intersection_of_linestring_with_areal
         detail::get_turns::no_interrupt_policy policy;
         geometry::get_turns
             <
-                false, false, detail::overlay::calculate_distance_policy
+                false, ReverseAreal, detail::overlay::calculate_distance_policy
             >(linestring, areal, turns, policy);
 
         if (turns.empty())
@@ -355,7 +355,7 @@ struct intersection_insert
 template
 <
     typename Linestring, typename Polygon,
-    bool Reverse1, bool Reverse2, bool ReverseOut,
+    bool ReverseLinestring, bool ReversePolygon, bool ReverseOut,
     typename OutputIterator, typename GeometryOut,
     overlay_type OverlayType,
     typename Strategy
@@ -365,19 +365,46 @@ struct intersection_insert
         linestring_tag, polygon_tag, linestring_tag,
         false, true, false,
         Linestring, Polygon,
-        Reverse1, Reverse2, ReverseOut,
+        ReverseLinestring, ReversePolygon, ReverseOut,
         OutputIterator, GeometryOut,
         OverlayType,
         Strategy
     > : detail::intersection::intersection_of_linestring_with_areal
             <
                 Linestring, Polygon,
+                ReversePolygon,
                 OutputIterator, GeometryOut,
                 Strategy
             >
 {};
 
 
+template
+<
+    typename Linestring, typename Ring,
+    bool ReverseLinestring, bool ReverseRing, bool ReverseOut,
+    typename OutputIterator, typename GeometryOut,
+    overlay_type OverlayType,
+    typename Strategy
+>
+struct intersection_insert
+    <
+        linestring_tag, ring_tag, linestring_tag,
+        false, true, false,
+        Linestring, Ring,
+        ReverseLinestring, ReverseRing, ReverseOut,
+        OutputIterator, GeometryOut,
+        OverlayType,
+        Strategy
+    > : detail::intersection::intersection_of_linestring_with_areal
+            <
+                Linestring, Ring,
+                ReverseRing,
+                OutputIterator, GeometryOut,
+                Strategy
+            >
+{};
+
 template
 <
     typename Segment, typename Box,

include/boost/geometry/multi/algorithms/intersection.hpp

@@ -114,6 +114,7 @@ struct intersection_linestring_multi_linestring_point
 template
 <
     typename MultiLinestring, typename Areal,
+    bool ReverseAreal,
     typename OutputIterator, typename LineStringOut,
     typename Strategy
 >
@@ -133,7 +134,7 @@ struct intersection_of_multi_linestring_with_areal
             out = intersection_of_linestring_with_areal
                 <
                     typename boost::range_value<MultiLinestring>::type,
-                    Areal,
+                    Areal, ReverseAreal,
                     OutputIterator, LineStringOut, Strategy
                 >::apply(*it, areal, out, strategy);
         }
@@ -147,6 +148,7 @@ struct intersection_of_multi_linestring_with_areal
 template
 <
     typename Areal, typename MultiLinestring,
+    bool ReverseAreal,
     typename OutputIterator, typename LineStringOut,
     typename Strategy
 >
@@ -158,7 +160,7 @@ struct intersection_of_areal_with_multi_linestring
     {
         return intersection_of_multi_linestring_with_areal
             <
-                MultiLinestring, Areal,
+                MultiLinestring, Areal, ReverseAreal,
                 OutputIterator, LineStringOut,
                 Strategy
             >::apply(ml, areal, out, strategy);
@@ -283,7 +285,7 @@ struct intersection_insert
 template
 <
     typename Linestring, typename MultiPolygon,
-    bool Reverse1, bool Reverse2, bool ReverseOut,
+    bool ReverseLinestring, bool ReverseMultiPolygon, bool ReverseOut,
     typename OutputIterator, typename GeometryOut,
     overlay_type OverlayType,
     typename Strategy
@@ -293,13 +295,14 @@ struct intersection_insert
         linestring_tag, multi_polygon_tag, linestring_tag,
         false, true, false,
         Linestring, MultiPolygon,
-        Reverse1, Reverse2, ReverseOut,
+        ReverseLinestring, ReverseMultiPolygon, ReverseOut,
         OutputIterator, GeometryOut,
         OverlayType,
         Strategy
     > : detail::intersection::intersection_of_linestring_with_areal
             <
                 Linestring, MultiPolygon,
+                ReverseMultiPolygon,
                 OutputIterator, GeometryOut,
                 Strategy
             >
@@ -311,7 +314,7 @@ struct intersection_insert
 template
 <
     typename Polygon, typename MultiLinestring,
-    bool Reverse1, bool Reverse2, bool ReverseOut,
+    bool ReversePolygon, bool ReverseMultiLinestring, bool ReverseOut,
     typename OutputIterator, typename GeometryOut,
     overlay_type OverlayType,
     typename Strategy
@@ -321,23 +324,53 @@ struct intersection_insert
         polygon_tag, multi_linestring_tag, linestring_tag,
         true, false, false,
         Polygon, MultiLinestring,
-        Reverse1, Reverse2, ReverseOut,
+        ReversePolygon, ReverseMultiLinestring, ReverseOut,
         OutputIterator, GeometryOut,
         OverlayType,
         Strategy
     > : detail::intersection::intersection_of_areal_with_multi_linestring
             <
                 Polygon, MultiLinestring,
+                ReversePolygon,
                 OutputIterator, GeometryOut,
                 Strategy
             >
 {};
 
 
+template
+<
+    typename MultiLinestring, typename Ring,
+    bool ReverseMultiLinestring, bool ReverseRing, bool ReverseOut,
+    typename OutputIterator, typename GeometryOut,
+    overlay_type OverlayType,
+    typename Strategy
+>
+struct intersection_insert
+    <
+        multi_linestring_tag, ring_tag, linestring_tag,
+        false, true, false,
+        MultiLinestring, Ring,
+        ReverseMultiLinestring, ReverseRing, ReverseOut,
+        OutputIterator, GeometryOut,
+        OverlayType,
+        Strategy
+    > : detail::intersection::intersection_of_multi_linestring_with_areal
+            <
+                MultiLinestring, Ring,
+                ReverseRing,
+                OutputIterator, GeometryOut,
+                Strategy
+            >
+{};
+
+
+
+
 template
 <
     typename MultiLinestring, typename MultiPolygon,
-    bool Reverse1, bool Reverse2, bool ReverseOut,
+    bool ReverseMultiLinestring, bool ReverseMultiPolygon, bool ReverseOut,
     typename OutputIterator, typename GeometryOut,
     overlay_type OverlayType,
     typename Strategy
@@ -347,13 +380,14 @@ struct intersection_insert
         multi_linestring_tag, multi_polygon_tag, linestring_tag,
         false, true, false,
         MultiLinestring, MultiPolygon,
-        Reverse1, Reverse2, ReverseOut,
+        ReverseMultiLinestring, ReverseMultiPolygon, ReverseOut,
         OutputIterator, GeometryOut,
         OverlayType,
         Strategy
     > : detail::intersection::intersection_of_multi_linestring_with_areal
             <
                 MultiLinestring, MultiPolygon,
+                ReverseMultiPolygon,
                 OutputIterator, GeometryOut,
                 Strategy
             >