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Merge pull request #9903 from bykoianko/master-comment-about-two-geom-caches

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[routing] Adding comment about two geom caches for bidirectional A*.
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gmoryes 2018-11-26 16:57:38 +03:00 • committed by GitHub
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routing/geometry.hpp
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@ -110,6 +110,9 @@ public:
/// On the other hand methods GetRoad() and GetPoint() return geometry information by reference.
/// The reference may be invalid after the next call of GetRoad() or GetPoint() because the cache
/// item which is referred by returned reference may be evicted. It's done for performance reasons.
/// \note The cache |m_featureIdToRoad| is used for road geometry for single-directional
/// and bidirectional A*. According to tests it's faster to use one cache for both directions
/// in bidirectional A* case than two separate caches, one for each direction (one for each A* wave).
class Geometry final
{
public: