示例#1
0
  /**
   * Search for the end of the maze using the frontier. Keep going until you find a solution or run
   * out of elements on the frontier.
   */
  private boolean solve() {
    Node startNode = new Node(startRow, startCol, null);
    placesToGo.add(startNode); // adding start pos to frontier
    while (placesToGo.hasNext()) {
      Node current = placesToGo.next();

      int[] xandy = current.getValue();
      int x = xandy[0];
      int y = xandy[1];
      if (maze[x][y] == 'E') {
        return true;
      }

      for (Node neigh : getNeighbors(current)) {
        placesToGo.add(neigh);
        maze[x][y] = '.';
      }

      if (animate) {
        wait(100);
        clearTerminal();
        System.out.println(toString());
      }
    }
    return false;
  }
示例#2
0
 /**
  * Search for the end of the maze using the frontier. Keep going until you find a solution or run
  * out of elements on the frontier.
  */
 private boolean solve() {
   Node current = new Node(startRow, startCol, null);
   placesToGo.add(current);
   while (placesToGo.hasNext()) {
     current = placesToGo.next();
     if (maze[current.getRow()][current.getCol()] == 'E') {
       return true;
     }
     neighbors(current);
     if (animate) {
       wait(100);
       toString();
     }
   }
   return false;
 }
示例#3
0
 public boolean neighbors(Node current) {
   try {
     if (maze[current.getRow() + 1][current.getCol()] == ' ') {
       placesToGo.add(new Node(current.getRow() + 1, current.getCol(), current));
     }
     if (maze[current.getRow() - 1][current.getCol()] == ' ') {
       placesToGo.add(new Node(current.getRow() - 1, current.getCol(), current));
     }
     if (maze[current.getRow()][current.getCol() + 1] == ' ') {
       placesToGo.add(new Node(current.getRow(), current.getCol() + 1, current));
     }
     if (maze[current.getRow()][current.getCol() - 1] == ' ') {
       placesToGo.add(new Node(current.getRow(), current.getCol() - 1, current));
     }
     return true;
   } catch (IndexOutOfBoundsException e) {
     return false;
   }
 }
示例#4
0
 public void fdo_close(ServletOutputStream sos) throws Exception {
   if (acquired) {
     acquired = false;
     try {
       dbm.release(plugin, sos);
     } catch (Exception e) {
       Frontier.Log("Error releasing DB connection " + e);
       throw e;
     }
   }
 }
示例#5
0
  /**
   * return a COPY of solution. This should be : [x1,y1,x2,y2,x3,y3...] the coordinates of the
   * solution from start to end. Precondition : one of the solveXXX methods has already been called
   * (solveBFS OR solveDFS OR solveAStar) (otherwise an empty array is returned) Postcondition: the
   * correct solution is in the returned array
   */
  public int[] solutionCoordinates() {
    MyQueue<Integer> listOfInts = new MyQueue<Integer>();
    Node current = placesToGo.next();
    while (current != null) {
      listOfInts.enqueue(current.getValue()[0]);
      listOfInts.enqueue(current.getValue()[1]);
      current = current.getPrev();
    }

    solution = new int[listOfInts.size()];
    for (int i = 0; i < solution.length; i++) {
      solution[i] = listOfInts.dequeue();
    }

    return solution;
  }