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Reduce NewName Instructructions / Name Changes

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With @karenzshea's name / ref split (ref. #2857) in master we want to
make use of it and reduce `NewName` instructions when ever possible.
This is a first step towards #2744 by using the already existing name
change heuristic from the extractor now in post-processing as well.

Limitations: at the moment we don't have the `SuffixTable` in
post-processing; this would require us serializing and subsequently
deserializing the table, passing it through from the profiles to the
API.
This commit is contained in:
Daniel J. Hofmann
2016-09-12 15:24:15 +02:00
committed by Moritz Kobitzsch
parent 7ffe832ff8
commit 60010dd998
10 changed files with 412 additions and 193 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/engine/guidance/post_processing.cpp
+36 -24
View File
@@ -1,5 +1,5 @@
#include "extractor/guidance/turn_instruction.hpp"
#include "engine/guidance/post_processing.hpp"
#include "extractor/guidance/turn_instruction.hpp"
#include "engine/guidance/assemble_steps.hpp"
#include "engine/guidance/lane_processing.hpp"
@@ -83,18 +83,6 @@ bool isCollapsableInstruction(const TurnInstruction instruction)
bool compatible(const RouteStep &lhs, const RouteStep &rhs) { return lhs.mode == rhs.mode; }
double nameSegmentLength(std::size_t at, const std::vector<RouteStep> &steps)
{
double result = steps[at].distance;
while (at + 1 < steps.size() && steps[at + 1].name_id == steps[at].name_id)
{
++at;
result += steps[at].distance;
}
return result;
}
// invalidate a step and set its content to nothing
void invalidateStep(RouteStep &step) { step = getInvalidRouteStep(); }
@@ -129,6 +117,28 @@ double turn_angle(const double entry_bearing, const double exit_bearing)
return angle > 360 ? angle - 360 : angle;
}
// Checks if name change happens the user wants to know about.
// Treats e.g. "Name (Ref)" -> "Name" changes still as same name.
bool isNoticeableNameChange(const RouteStep &lhs, const RouteStep &rhs)
{
// TODO: at some point we might want to think about pronunciation here.
// Also rotary_name is not handled at the moment.
return util::guidance::requiresNameAnnounced(lhs.name, lhs.ref, rhs.name, rhs.ref);
}
double nameSegmentLength(std::size_t at, const std::vector<RouteStep> &steps)
{
BOOST_ASSERT(at < steps.size());
double result = steps[at].distance;
while (at + 1 < steps.size() && !isNoticeableNameChange(steps[at], steps[at + 1]))
{
at += 1;
result += steps[at].distance;
}
return result;
}
OSRM_ATTR_WARN_UNUSED
RouteStep forwardInto(RouteStep destination, const RouteStep &source)
{
@@ -409,12 +419,16 @@ void collapseTurnAt(std::vector<RouteStep> &steps,
if (compatible(one_back_step, current_step))
{
steps[one_back_index] = elongate(std::move(steps[one_back_index]), steps[step_index]);
if ((TurnType::Continue == one_back_step.maneuver.instruction.type ||
TurnType::Suppressed == one_back_step.maneuver.instruction.type) &&
current_step.name_id != steps[two_back_index].name_id)
isNoticeableNameChange(steps[two_back_index], current_step))
{
steps[one_back_index].maneuver.instruction.type = TurnType::Turn;
}
else if (TurnType::Turn == one_back_step.maneuver.instruction.type &&
current_step.name_id == steps[two_back_index].name_id)
!isNoticeableNameChange(steps[two_back_index], current_step))
{
steps[one_back_index].maneuver.instruction.type = TurnType::Continue;
@@ -460,7 +474,7 @@ void collapseTurnAt(std::vector<RouteStep> &steps,
{
BOOST_ASSERT(two_back_index < steps.size());
// the simple case is a u-turn that changes directly into the in-name again
const bool direct_u_turn = steps[two_back_index].name_id == current_step.name_id;
const bool direct_u_turn = !isNoticeableNameChange(steps[two_back_index], current_step);
// however, we might also deal with a dual-collapse scenario in which we have to
// additionall collapse a name-change as welll
@@ -471,7 +485,7 @@ void collapseTurnAt(std::vector<RouteStep> &steps,
isCollapsableInstruction(steps[next_step_index].maneuver.instruction));
const bool u_turn_with_name_change =
continues_with_name_change &&
steps[next_step_index].name_id == steps[two_back_index].name_id;
!isNoticeableNameChange(steps[two_back_index], steps[next_step_index]);
if (direct_u_turn || u_turn_with_name_change)
{
@@ -795,9 +809,8 @@ std::vector<RouteStep> collapseTurns(std::vector<RouteStep> steps)
// Turn Types in the response depend on whether we find the same road name
// (sliproad indcating a u-turn) or if we are turning onto a different road, in
// which case we use a turn.
if (steps[getPreviousIndex(one_back_index)].name_id ==
steps[step_index].name_id &&
steps[step_index].name_id != EMPTY_NAMEID)
if (!isNoticeableNameChange(steps[getPreviousIndex(one_back_index)],
steps[step_index]))
steps[one_back_index].maneuver.instruction.type = TurnType::Continue;
else
steps[one_back_index].maneuver.instruction.type = TurnType::Turn;
@@ -831,7 +844,7 @@ std::vector<RouteStep> collapseTurns(std::vector<RouteStep> steps)
// These have to be handled in post-processing
else if (isCollapsableInstruction(current_step.maneuver.instruction) &&
current_step.maneuver.instruction.type != TurnType::Suppressed &&
steps[getPreviousNameIndex(step_index)].name_id == current_step.name_id &&
!isNoticeableNameChange(steps[getPreviousNameIndex(step_index)], current_step) &&
// canCollapseAll is also checking for compatible(step,step+1) for all indices
canCollapseAll(getPreviousNameIndex(step_index) + 1, next_step_index))
{
@@ -856,8 +869,7 @@ std::vector<RouteStep> collapseTurns(std::vector<RouteStep> steps)
const auto two_back_index = getPreviousIndex(one_back_index);
BOOST_ASSERT(two_back_index < steps.size());
// valid, since one_back is collapsable or a turn and therefore not depart:
const auto &coming_from_name_id = steps[two_back_index].name_id;
if (current_step.name_id == coming_from_name_id)
if (!isNoticeableNameChange(steps[two_back_index], current_step))
{
if (compatible(one_back_step, steps[two_back_index]))
{
@@ -889,7 +901,7 @@ std::vector<RouteStep> collapseTurns(std::vector<RouteStep> steps)
else if (step_index + 2 < steps.size() &&
current_step.maneuver.instruction.type == TurnType::NewName &&
steps[next_step_index].maneuver.instruction.type == TurnType::NewName &&
one_back_step.name_id == steps[next_step_index].name_id)
!isNoticeableNameChange(one_back_step, steps[next_step_index]))
{
if (compatible(steps[step_index], steps[next_step_index]))
{