osrm-backend/include/engine/phantom_node.hpp

/*

Copyright (c) 2017, Project OSRM contributors
All rights reserved.

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are permitted provided that the following conditions are met:

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list of conditions and the following disclaimer in the documentation and/or
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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*/

#ifndef OSRM_ENGINE_PHANTOM_NODES_H
#define OSRM_ENGINE_PHANTOM_NODES_H

#include "extractor/travel_mode.hpp"

#include "util/typedefs.hpp"
#include "util/bearing.hpp"
#include "util/coordinate.hpp"

#include <boost/assert.hpp>

namespace osrm
{
namespace engine
{

struct PhantomNode
{
    PhantomNode()
        : forward_segment_id{SPECIAL_SEGMENTID, false},
          reverse_segment_id{SPECIAL_SEGMENTID, false}, forward_weight(INVALID_EDGE_WEIGHT),
          reverse_weight(INVALID_EDGE_WEIGHT), forward_weight_offset(0), reverse_weight_offset(0),
          forward_duration(MAXIMAL_EDGE_DURATION), reverse_duration(MAXIMAL_EDGE_DURATION),
          forward_duration_offset(0), reverse_duration_offset(0), fwd_segment_position(0),
          is_valid_forward_source{false}, is_valid_forward_target{false},
          is_valid_reverse_source{false}, is_valid_reverse_target{false}, bearing(0)
    {
    }

    EdgeWeight GetForwardWeightPlusOffset() const
    {
        BOOST_ASSERT(forward_segment_id.enabled);
        return forward_weight_offset + forward_weight;
    }

    EdgeWeight GetReverseWeightPlusOffset() const
    {
        BOOST_ASSERT(reverse_segment_id.enabled);
        return reverse_weight_offset + reverse_weight;
    }

    EdgeWeight GetForwardDuration() const
    {
        BOOST_ASSERT(forward_segment_id.enabled);
        return forward_duration + forward_duration_offset;
    }

    EdgeWeight GetReverseDuration() const
    {
        BOOST_ASSERT(reverse_segment_id.enabled);
        return reverse_duration + reverse_duration_offset;
    }

    bool IsBidirected() const { return forward_segment_id.enabled && reverse_segment_id.enabled; }

    bool IsValid(const unsigned number_of_nodes) const
    {
        return location.IsValid() && ((forward_segment_id.id < number_of_nodes) ||
                                      (reverse_segment_id.id < number_of_nodes)) &&
               ((forward_weight != INVALID_EDGE_WEIGHT) ||
                (reverse_weight != INVALID_EDGE_WEIGHT)) &&
               ((forward_duration != MAXIMAL_EDGE_DURATION) ||
                (reverse_duration != MAXIMAL_EDGE_DURATION)) &&
               (component.id != INVALID_COMPONENTID);
    }

    bool IsValid(const unsigned number_of_nodes, const util::Coordinate queried_coordinate) const
    {
        return queried_coordinate == input_location && IsValid(number_of_nodes);
    }

    bool IsValid() const { return location.IsValid(); }

    bool IsValidForwardSource() const
    {
        return forward_segment_id.enabled && is_valid_forward_source;
    }
    bool IsValidForwardTarget() const
    {
        return forward_segment_id.enabled && is_valid_forward_target;
    }
    bool IsValidReverseSource() const
    {
        return reverse_segment_id.enabled && is_valid_reverse_source;
    }
    bool IsValidReverseTarget() const
    {
        return reverse_segment_id.enabled && is_valid_reverse_target;
    }
    short GetBearing(const bool traversed_in_reverse) const
    {
        if (traversed_in_reverse)
            return std::round(util::bearing::reverse(bearing));
        return std::round(bearing);
    }

    bool operator==(const PhantomNode &other) const { return location == other.location; }

    template <class OtherT>
    explicit PhantomNode(const OtherT &other,
                         ComponentID component,
                         EdgeWeight forward_weight,
                         EdgeWeight reverse_weight,
                         EdgeWeight forward_weight_offset,
                         EdgeWeight reverse_weight_offset,
                         EdgeWeight forward_duration,
                         EdgeWeight reverse_duration,
                         EdgeWeight forward_duration_offset,
                         EdgeWeight reverse_duration_offset,
                         bool is_valid_forward_source,
                         bool is_valid_forward_target,
                         bool is_valid_reverse_source,
                         bool is_valid_reverse_target,
                         const util::Coordinate location,
                         const util::Coordinate input_location,
                         const unsigned short bearing)
        : forward_segment_id{other.forward_segment_id},
          reverse_segment_id{other.reverse_segment_id}, forward_weight{forward_weight},
          reverse_weight{reverse_weight}, forward_weight_offset{forward_weight_offset},
          reverse_weight_offset{reverse_weight_offset}, forward_duration{forward_duration},
          reverse_duration{reverse_duration}, forward_duration_offset{forward_duration_offset},
          reverse_duration_offset{reverse_duration_offset},
          component{component.id, component.is_tiny}, location{location},
          input_location{input_location}, fwd_segment_position{other.fwd_segment_position},
          is_valid_forward_source{is_valid_forward_source},
          is_valid_forward_target{is_valid_forward_target},
          is_valid_reverse_source{is_valid_reverse_source},
          is_valid_reverse_target{is_valid_reverse_target}, bearing{bearing}
    {
    }

    SegmentID forward_segment_id;
    SegmentID reverse_segment_id;
    EdgeWeight forward_weight;
    EdgeWeight reverse_weight;
    EdgeWeight forward_weight_offset; // TODO: try to remove -> requires path unpacking changes
    EdgeWeight reverse_weight_offset; // TODO: try to remove -> requires path unpacking changes
    EdgeWeight forward_duration;
    EdgeWeight reverse_duration;
    EdgeWeight forward_duration_offset; // TODO: try to remove -> requires path unpacking changes
    EdgeWeight reverse_duration_offset; // TODO: try to remove -> requires path unpacking changes
    ComponentID component;

    util::Coordinate location;
    util::Coordinate input_location;
    unsigned short fwd_segment_position;
    // is phantom node valid to be used as source or target
  private:
    unsigned short is_valid_forward_source : 1;
    unsigned short is_valid_forward_target : 1;
    unsigned short is_valid_reverse_source : 1;
    unsigned short is_valid_reverse_target : 1;
    unsigned short bearing : 12;
};

static_assert(sizeof(PhantomNode) == 64, "PhantomNode has more padding then expected");

using PhantomNodePair = std::pair<PhantomNode, PhantomNode>;

struct PhantomNodeWithDistance
{
    PhantomNode phantom_node;
    double distance;
};

struct PhantomNodes
{
    PhantomNode source_phantom;
    PhantomNode target_phantom;
};

}
}

#endif // PHANTOM_NODES_H