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nearest neighbor grid can now be specialized to be read only with a template parameter.

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This commit is contained in:
Dennis Luxen
2010-09-03 07:14:58 +00:00
parent f9f4fa2972
commit 6fcc6722c4
3 changed files with 19 additions and 13 deletions
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DataStructures/NNGrid.h
+14 -8
View File
@@ -144,10 +144,11 @@ static void getListOfIndexesForEdgeAndGridSize(_Coordinate& start, _Coordinate&
bresenham(x1*32768, y1*32768, x2*32768, y2*32768, indexList);
}
template<bool WriteAccess = false>
class NNGrid {
public:
NNGrid() { ramIndexTable.resize((1024*1024), UINT_MAX); }
NNGrid() { ramIndexTable.resize((1024*1024), UINT_MAX); if( WriteAccess) { entries = new stxxl::vector<GridEdgeData>(); }}
NNGrid(const char* rif, const char* iif) {
ramIndexTable.resize((1024*1024), UINT_MAX);
@@ -158,6 +159,11 @@ public:
~NNGrid() {
if(ramInFile.is_open()) ramInFile.close();
if(indexInFile.is_open()) indexInFile.close();
if (WriteAccess)
{
delete entries;
}
}
void OpenIndexFiles()
@@ -183,7 +189,7 @@ public:
getListOfIndexesForEdgeAndGridSize(start, target, indexList);
for(int i = 0; i < indexList.size(); i++)
{
entries.push_back(GridEdgeData(edge, indexList[i].first, indexList[i].second));
entries->push_back(GridEdgeData(edge, indexList[i].first, indexList[i].second));
}
}
@@ -192,18 +198,18 @@ public:
double timestamp = get_timestamp();
//create index file on disk, old one is over written
indexOutFile.open(fileIndexOut, std::ios::out | std::ios::binary | std::ios::trunc);
cout << "sorting grid data consisting of " << entries.size() << " edges..." << flush;
cout << "sorting grid data consisting of " << entries->size() << " edges..." << flush;
//sort entries
stxxl::sort(entries.begin(), entries.end(), CompareGridEdgeDataByRamIndex(), 1024*1024*1024);
stxxl::sort(entries->begin(), entries->end(), CompareGridEdgeDataByRamIndex(), 1024*1024*1024);
cout << "ok in " << (get_timestamp() - timestamp) << "s" << endl;
std::vector<GridEdgeData> entriesInFileWithRAMSameIndex;
unsigned indexInRamTable = entries.begin()->ramIndex;
unsigned indexInRamTable = entries->begin()->ramIndex;
unsigned lastPositionInIndexFile = 0;
unsigned numberOfUsedCells = 0;
unsigned maxNumberOfRAMCellElements = 0;
cout << "writing data ..." << flush;
Percent p(entries.size());
for(stxxl::vector<GridEdgeData>::iterator vt = entries.begin(); vt != entries.end(); vt++)
Percent p(entries->size());
for(stxxl::vector<GridEdgeData>::iterator vt = entries->begin(); vt != entries->end(); vt++)
{
p.printIncrement();
if(vt->ramIndex != indexInRamTable)
@@ -587,7 +593,7 @@ private:
ofstream indexOutFile;
ifstream indexInFile;
ifstream ramInFile;
stxxl::vector<GridEdgeData> entries;
stxxl::vector<GridEdgeData> * entries;
std::vector<unsigned> ramIndexTable; //4 MB for first level index in RAM
};
}
DataStructures/NodeInformationHelpDesk.h
+3 -3
View File
@@ -29,11 +29,11 @@ or see http://www.gnu.org/licenses/agpl.txt.
#include "NNGrid.h"
#include "PhantomNodes.h"
typedef NNGrid::NNGrid Grid;
typedef NNGrid::NNGrid<false> ReadOnlyGrid;
class NodeInformationHelpDesk{
public:
NodeInformationHelpDesk(const char* ramIndexInput, const char* fileIndexInput) { numberOfNodes = 0; int2ExtNodeMap = new vector<_Coordinate>(); g = new Grid(ramIndexInput,fileIndexInput); }
NodeInformationHelpDesk(const char* ramIndexInput, const char* fileIndexInput) { numberOfNodes = 0; int2ExtNodeMap = new vector<_Coordinate>(); g = new ReadOnlyGrid(ramIndexInput,fileIndexInput); }
~NodeInformationHelpDesk() { delete int2ExtNodeMap; delete g; }
void initNNGrid(ifstream& in)
{
@@ -61,7 +61,7 @@ public:
}
private:
vector<_Coordinate> * int2ExtNodeMap;
Grid * g;
ReadOnlyGrid * g;
unsigned numberOfNodes;
};