proland::GraphProducer::GraphCache Class Reference

Cache that manages the precomputed Graphs (including root Graph). More...

#include <GraphProducer.h>

Inherits Object.

Public Member Functions
	GraphCache (GraphPtr root, string graphName, ptr< ResourceManager > manager, bool loadSubgraphs=false)
	Creates a new GraphCache.
	~GraphCache ()
	Deletes this GraphCache.
GraphPtr	getTile (TileCache::Tile::Id tileId)
	Returns the graph corresponding to a precomputed Tile.
void	add (TileCache::Tile::Id id, GraphPtr graph)
	Adds a graph to the cache and save it to the disk.
Private Attributes
bool	loadSubgraphs
	Determines whether to load subgraphs or not.
string	graphName
	The name of the file from which we loaded the root Graph.
ptr< ResourceManager >	manager
	The resource manager used to load .graph files.
map< TileCache::Tile::Id, GraphPtr >	graphs
	Maps Tile Ids with Graphs.

Detailed Description

Cache that manages the precomputed Graphs (including root Graph).

It can load directly from the disk every tiles at a given level. If the file doesn't exist, the tile will be created from the root Graph (in GraphProducer::doCreateTile()) and then stored in cache and saved to disk.

Constructor & Destructor Documentation

proland::GraphProducer::GraphCache::GraphCache	(	GraphPtr	root,
		string	graphName,
		ptr< ResourceManager >	manager,
		bool	loadSubgraphs = `false`
	)

Creates a new GraphCache.

Parameters:

	root	the root Graph.
	graphName	the name of the file from which we loaded the root Graph. This is used to load and save the Graphs at level GraphProducer::precomputedLevel, if different from 0.
	manager	the resource manager that will load the .graph files.
	loadSubgraphs	whether to load subgraphs or not.

proland::GraphProducer::GraphCache::~GraphCache ( )

Deletes this GraphCache.

Member Function Documentation

void proland::GraphProducer::GraphCache::add	(	TileCache::Tile::Id	id,
		GraphPtr	graph
	)

Adds a graph to the cache and save it to the disk.

Parameters:

	id	the id of the tile to add.
	graph	the corresponding Graph.

GraphPtr proland::GraphProducer::GraphCache::getTile ( TileCache::Tile::Id tileId )

Returns the graph corresponding to a precomputed Tile.

If it's in cache, it just returns it. If not, it checks if it can load and return it. If it's not available, returns NULL. It will then be recomputed from the root Tile in GraphProducer, added to the cache, and saved on the disk.

Parameters:

tileId

the id of the tile to load.