Esempi in C++ (Cpp) per AStarSearch::CancelSearch

Esempio n. 1

File: waypointmanager.cpp Progetto: yixu34/RestlessMoon2

PathPtr WaypointManager::getPath(WaypointPtr source, WaypointPtr destination)
{
    PathPtr path(new Path());
    int state;
    Node s(source,0);
    Node d(destination,0);
    AStarSearch<Node> astarsearch;
    astarsearch.SetStartAndGoalStates(s,d);
    while((state=astarsearch.SearchStep()) == AStarSearch<Node>::SEARCH_STATE_SEARCHING)
    {
        log("Astar search stepped");
    }
    if(state == AStarSearch<Node>::SEARCH_STATE_SUCCEEDED)
    {
        log("AStar found path");
        Node * n = astarsearch.GetSolutionStart();
        while(( n = astarsearch.GetSolutionNext() )!= NULL)
            path->addWaypoint(n->getWP());
    }

    astarsearch.CancelSearch();

    return path;

}

Esempio n. 2

File: 8puzzle.cpp Progetto: Cholik/astar-algorithm-cpp

int main( int argc, char *argv[] )
{

	cout << "STL A* 8-puzzle solver implementation\n(C)2001 Justin Heyes-Jones\n";

	bool bUserBoard = false;

	if( argc > 1 )
	{
		char *userboard = argv[1];

		int i = 0;
		int c;

		while( c = argv[1][i] )
		{
			if( isdigit( c ) )
			{
				int num = (c - '0');

				PuzzleState::g_start[i] = static_cast<PuzzleState::TILE>(num);
				
			}
		
			i++;
		}


	}

	// Create an instance of the search class...

	AStarSearch<PuzzleState> astarsearch;

	int NumTimesToSearch = NUM_TIMES_TO_RUN_SEARCH;

	while( NumTimesToSearch-- )
	{

		// Create a start state
		PuzzleState nodeStart( PuzzleState::g_start );

		// Define the goal state
		PuzzleState nodeEnd( PuzzleState::g_goal );

		// Set Start and goal states
		astarsearch.SetStartAndGoalStates( nodeStart, nodeEnd );

		unsigned int SearchState;

		unsigned int SearchSteps = 0;

		do
		{
			SearchState = astarsearch.SearchStep();

#if DEBUG_LISTS

			float f,g,h;

			cout << "Search step " << SearchSteps << endl;

			cout << "Open:\n";
			PuzzleState *p = astarsearch.GetOpenListStart( f,g,h );
			while( p )
			{
				((PuzzleState *)p)->PrintNodeInfo();
				cout << "f: " << f << " g: " << g << " h: " << h << "\n\n";
				
				p = astarsearch.GetOpenListNext( f,g,h );
				
			}

			cout << "Closed:\n";
			p = astarsearch.GetClosedListStart( f,g,h );
			while( p )
			{
				p->PrintNodeInfo();
				cout << "f: " << f << " g: " << g << " h: " << h << "\n\n";
				
				p = astarsearch.GetClosedListNext( f,g,h );
			}

#endif

// Test cancel search
#if 0
			int StepCount = astarsearch.GetStepCount();
			if( StepCount == 10 )
			{
				astarsearch.CancelSearch();
			}
#endif
			SearchSteps++;
		}
		while( SearchState == AStarSearch<PuzzleState>::SEARCH_STATE_SEARCHING );

		if( SearchState == AStarSearch<PuzzleState>::SEARCH_STATE_SUCCEEDED )
		{
#if DISPLAY_SOLUTION_FORWARDS
			cout << "Search found goal state\n";
#endif
			PuzzleState *node = astarsearch.GetSolutionStart();

#if DISPLAY_SOLUTION_FORWARDS
			cout << "Displaying solution\n";
#endif
			int steps = 0;

#if DISPLAY_SOLUTION_FORWARDS
			node->PrintNodeInfo();
			cout << endl;
#endif
			for( ;; )
			{
				node = astarsearch.GetSolutionNext();

				if( !node )
				{
					break;
				}

#if DISPLAY_SOLUTION_FORWARDS
				node->PrintNodeInfo();
				cout << endl;
#endif
				steps ++;
			
			};

#if DISPLAY_SOLUTION_FORWARDS
			// todo move step count into main algorithm
			cout << "Solution steps " << steps << endl;
#endif

////////////

			node = astarsearch.GetSolutionEnd();

#if DISPLAY_SOLUTION_BACKWARDS
			cout << "Displaying reverse solution\n";
#endif
			steps = 0;

			node->PrintNodeInfo();
			cout << endl;
			for( ;; )
			{
				node = astarsearch.GetSolutionPrev();

				if( !node )
				{
					break;
				}
#if DISPLAY_SOLUTION_BACKWARDS
				node->PrintNodeInfo();
                cout << endl;
#endif
				steps ++;
			
			};

#if DISPLAY_SOLUTION_BACKWARDS
			cout << "Solution steps " << steps << endl;
#endif

//////////////

			// Once you're done with the solution you can free the nodes up
			astarsearch.FreeSolutionNodes();
		
		}
		else if( SearchState == AStarSearch<PuzzleState>::SEARCH_STATE_FAILED ) 
		{
#if DISPLAY_SOLUTION_INFO
			cout << "Search terminated. Did not find goal state\n";
#endif		
		}
		else if( SearchState == AStarSearch<PuzzleState>::SEARCH_STATE_OUT_OF_MEMORY ) 
		{
#if DISPLAY_SOLUTION_INFO
			cout << "Search terminated. Out of memory\n";
#endif		
		}

		

		// Display the number of loops the search went through
#if DISPLAY_SOLUTION_INFO
		cout << "SearchSteps : " << astarsearch.GetStepCount() << endl;
#endif
	}

	return 0;
}