Merge pull request #567 from thomassedlmayer/bug/ha/dashed-lines

Add dash property to boundary points

Author: pmai

osi_lane.proto

@@ -728,8 +728,7 @@ message LaneBoundary
     // another at the end of each dashed line segment. The first
     // \c BoundaryPoint defines the beginning of the first dashed lane marking.
     // The last \c BoundaryPoint defines the end of the last dashed lane
-    // marking. For example, the area between the second and third
-    // \c BoundaryPoint has no lane marking, and so on.
+    // marking.
     // \note For Botts' dots lines, one \c BoundaryPoint position has to define
     // each Botts' dot.
     //
@@ -817,6 +816,45 @@ message LaneBoundary
         // See \c LaneBoundary .
         //
         optional double height = 3;
+
+        // Alternation of dashes in case of a dashed lane boundary. In
+        // context, this field gives information about the location of
+        // dashes on the boundary line.
+        //
+        optional Dash dash = 4;
+
+        // This enum describes the alternation of dashes in case of a
+        // dashed lane boundary.
+        //
+        // \note The enum descriptions adhere to the definition direction
+        // of the lane boundary points. This means that start or end of a
+        // dash are understood with respect to the direction in which the
+        // points of the boundary line are defined.
+        //
+        enum Dash
+        {
+            // The current state of the dash alternation is not known (must
+            // not be used in ground truth). 
+            //
+            DASH_UNKNOWN = 0;
+
+            // Other (unspecified but known) type of dash alternation state. 
+            //
+            DASH_OTHER = 1;
+            
+            // The current \c BoundaryPoint indicates the start of a dash.
+            //
+            DASH_START = 2;
+
+            // The current \c BoundaryPoint is located on a dash of a dashed
+            // line. This enables a dash to continue across multiple points.
+            //
+            DASH_CONTINUE = 3;
+
+            // The current \c BoundaryPoint indicates the end of a dash.
+            //
+            DASH_END = 4;
+        }
     }
 
     //
@@ -947,7 +985,7 @@ message LaneBoundary
             //
             TYPE_OTHER = 1;
 
-            // An invisible lane boundary (e.g. unmarked part of a dashed line).
+            // An invisible lane boundary.
             //
             TYPE_NO_LINE = 2;