Exemple #1
0
  public static int getLB(Item it, Posi_tion p, VehicleType ve) {
    // Can't be placed in vehicle
    if ((p.getY() + it.get_length() > ve.get_length())
        || (p.getX() + it.get_width() > ve.get_width())) return 0;
    /*
     * int index = ve.unpacked.indexOf(it); ve.unpacked.remove(index);
     * ve.packed.add(it);
     */

    int y1 = it.get_length() + p.getY();
    int x1 = it.get_width() + p.getX();
    int itArea = it.get_length() * it.get_width();

    // Situation 1
    if (ve.pos.size() == 1) {
      return remainArea - itArea;
    }

    // Situation 2
    if (p.getX() == 0) {
      if (x1 < ve.pos.get(1).getX()) {
        return remainArea - itArea;
      } else {
        return remainArea
            - itArea
            - (x1 - ve.pos.get(1).getX()) * (ve.pos.get(0).getY() - ve.pos.get(1).getY());
      }
    }
    // Situation 3
    if (p.getY() == 0) {
      if (y1 < ve.pos.get(ve.pos.size() - 1).getY()) return remainArea - itArea;
      else
        return remainArea
            - itArea
            - (p.getX() - ve.pos.get(ve.pos.size() - 2).getX())
                * (y1 - ve.pos.get(ve.pos.size() - 2).getY());
    }
    // Situation 4
    int ip = ve.pos.indexOf(p);
    if (x1 < ve.pos.get(ip + 1).getX() && y1 < ve.pos.get(ip - 1).getY())
      return remainArea - itArea;
    else if (y1 >= ve.pos.get(ip - 1).getY())
      return remainArea
          - itArea
          - (p.getX() - ve.pos.get(ip - 1).getX()) * (y1 - ve.pos.get(ip - 1).getY());
    else if (x1 > ve.pos.get(ip + 1).getX())
      return remainArea
          - itArea
          - (x1 - ve.pos.get(ip + 1).getX()) * (p.getY() - ve.pos.get(ip + 1).getY());
    else return 0;
  }
Exemple #2
0
 public static boolean couldPutHere(Item it, Posi_tion position, VehicleType ve) {
   if (position.getX() + it.get_width() > ve.get_width()) {
     return false;
   }
   if (position.getY() + it.get_length() > ve.get_length()) {
     return false;
   }
   return true;
 }
Exemple #3
0
  public static boolean pack(ArrayList<Customer> customers, VehicleType ve) {
    double u = 0;
    ArrayList<Item> unpacked = new ArrayList<Item>();
    ArrayList<Item> packed = new ArrayList<Item>();
    for (Customer c : customers) {
      for (Item it : c.get_items()) {
        unpacked.add(it);
        u += it.get_area();
      }
    }
    u = u / ve.get_area();

    for (Item item : unpacked) {
      double vi = omega * item.get_area() + (1 - omega) * Math.pow(item.get_area(), p) / u;
      item.setUi(vi / item.get_area());
    }

    // 1. sorting
    Collections.sort(unpacked, Item.sort_by_Ui);
    // 2. loop
    int size = unpacked.size();
    double maxRemainArea = 0;
    for (int i = 0; i < size; ++i) {
      int k = -1;
      Item it = unpacked.get(i);
      for (int j = 0; j < ve.pos.size(); ++j) {
        // 3. inside loop you do GetLB
        if (couldPutHere(it, ve.pos.get(j), ve)) {
          int res = getLB(it, ve.pos.get(j), ve);

          if (maxRemainArea < res) {
            maxRemainArea = res;
            k = j;
          }
        }
      }
      if (k != -1) {
        Posi_tion positon = ve.pos.get(k);
        unpacked.remove(i);
        packed.add(it);
        it.set_item_x(positon.getX());
        it.set_item_y(positon.getY());
        // reset ve.pos;

        int x1 = ve.pos.get(k).getX() + it.get_width();
        int y1 = ve.pos.get(k).getY() + it.get_length();
        int itArea = it.get_length() * it.get_width();

        // Situation 1
        if (ve.pos.size() == 1) {
          remainArea = ve.get_area() - itArea;
          ve.pos.remove(0);
          ve.pos.add(new Posi_tion(0, it.get_length()));
          ve.pos.add(new Posi_tion(it.get_width(), 0));
        }

        // Need to find all possible positions to put new item and put all positions in the
        // arraylist pos.

        // Situation 2
        /*
        if (ve.pos.get(k).getX() == 0)
        {
        	if (x1 < ve.pos.get(1).getX())
        	{
        		ve.remainArea = ve.remainArea - itArea;
        		ve.pos.add(new Position(0, ve.pos.get(0).y
        				+ it.get_width()));
        		ve.pos.add(new Position(it.get_length(),
        				veve.pos.sort(new PosComp());.pos.get(0).y));
        		ve.pos.remove(0);
        		ve.pos.sort(new PosComp());
        	} else
        	{
        		ve.remainArea = ve.remainArea - itArea
        				- (x1 - ve.pos.get(1).x)
        				* (ve.pos.get(0).y - ve.pos.get(1).y);
        		ve.pos.add(new Position(0, ve.pos.get(0).y
        				+ it.get_width()));
        		ve.pos.add(new Position(it.get_length(),
        				ve.pos.get(1).y));
        		ve.pos.remove(0);
        		ve.pos.sort(new PosComp());
        	}
        }
        // Situation 3
        if (ve.pos.get(k).y == 0)
        {
        	if (y1 < ve.pos.get(ve.pos.size() - 1).y)
        	{
        		ve.remainArea = ve.remainArea - itArea;
        		ve.pos.add(new Position(ve.pos.get(k).x,
        				ve.pos.get(k).y + it.get_width()));
        		ve.pos.add(new Position(x1, 0));
        		ve.pos.remove(k);
        		ve.pos.sort(new PosComp());
        	} else
        	{
        		ve.remainArea = ve.remainArea
        				- itArea
        				- (ve.pos.get(k).x - ve.pos
        						.get(ve.pos.size() - 2).x)
        				* (y1 - ve.pos.get(ve.pos.size() - 2).y);
        		ve.pos.add(new Position(ve.pos.get(k - 1).x, y1));
        		ve.pos.add(new Position(x1, 0));
        		ve.pos.remove(k);
        		ve.pos.sort(new PosComp());
        	}
        }
        // Situation 4
        int ip = ve.pos.indexOf(ve.pos.get(k));
        if (x1 < ve.pos.get(ip + 1).x && y1 < ve.pos.get(ip - 1).y)
        {
        	ve.remainArea = ve.remainArea - itArea;
        	ve.pos.add(new Position(ve.pos.get(k).x, y1));
        	ve.pos.add(new Position(x1, ve.pos.get(k).y));
        	ve.pos.remove(k);
        	ve.pos.sort(new PosComp());
        } else if (y1 >= ve.pos.get(ip - 1).y)
        {
        	ve.remainArea = ve.remainArea - itArea
        			- (ve.pos.get(k).x - ve.pos.get(ip - 1).x)
        			* (y1 - ve.pos.get(ip - 1).y);
        	ve.pos.add(new Position(ve.pos.get(k - 1).x, y1));
        	ve.pos.add(new Position(x1, ve.pos.get(k).y));
        	ve.pos.remove(k);
        	ve.pos.sort(new PosComp());
        } else if (x1 > ve.pos.get(ip + 1).x)
        {
        	ve.remainArea = ve.remainArea - itArea
        			- (x1 - ve.pos.get(ip + 1).x)
        			* (y1 - ve.pos.get(ip + 1).y);
        	ve.pos.add(new Position(ve.pos.get(k).x, y1));
        	ve.pos.add(new Position(x1, ve.pos.get(k + 1).y));
        	ve.pos.remove(k);
        	ve.pos.sort(new PosComp());
        } else
        	;*/
      }
    }
    if (unpacked.size() != 0) return false;
    else return true;
  }