collapse use-lane instructions if possible

2016-07-18 11:24:41 +02:00
parent 2431e15ffa
commit 0e017a6ce5
6 changed files with 91 additions and 40 deletions
@@ -43,6 +43,15 @@ std::vector<RouteStep> buildIntersections(std::vector<RouteStep> steps);
 // remove steps invalidated by post-processing
 std::vector<RouteStep> removeNoTurnInstructions(std::vector<RouteStep> steps);

+// remove use lane information that is not actually a turn. For post-processing, we need to
+// associate lanes with every turn. Some of these use-lane instructions are not required after lane
+// anticipation anymore. This function removes all use lane instructions that are not actually used
+// anymore since all lanes going straight are used anyhow.
+// FIXME this is currently only a heuristic. We need knowledge on which lanes actually might become
+// turn lanes. If a straight lane becomes a turn lane, this might be something to consider. Right
+// now we bet on lane-anticipation to catch this.
+std::vector<RouteStep> collapseUseLane(std::vector<RouteStep> steps);
+
 // postProcess will break the connection between the leg geometry
 // for which a segment is supposed to represent exactly the coordinates
 // between routing maneuvers and the route steps itself.