//Caculate hn
public static int nonSuited(Chart trans, Chart goal)
{
int result = 0;
for (int i = 0; i < goal.positions.Length; i++)
{
if (goal.positions[i].getNum() != trans.positions[i].getNum())
{
result++;
}
}
return result;
}
public static int Manhattan(Chart trans,Chart goal)
{
int result = 0;
for(int i=0;i<9;i++)
{
if(trans.positions[i].getNum()!=0)
{
for(int j=0;j<9;j++)
{
if(trans.positions[i].getNum()==goal.positions[j].getNum())
{
result += Math.Abs(i - j);
break;
}
}
}
}
return result;
}
public int BreadthFirst()
{
closeList.Clear();
openList.Clear();
openList.Add(initial);
Chart transNode=new Chart();
while (true)
{
if (openList.Count == 0)
{
MessageBox.Show("open list is empty");
return fail;
}
transNode = openList.ElementAt(0);
if (hit(transNode))
{
MessageBox.Show("成功！遍历的节点数为:" + closeList.Count.ToString());
return success;
}
closeList.Add(transNode);
openList.Remove(transNode);
transNode.expandNode();
foreach (Chart item in transNode.children)
{
item.parent = transNode;
}
appendOpenList(transNode.children);
}
}
public bool equals(Chart chart2)
{
bool flag=true;
for(int i=0;i<9;i++)
{
if (this.positions[i].getNum() != chart2.positions[i].getNum())
flag = false;
}
return flag;
}
public Chart clone()
{
Chart newchart = new Chart();
for (int i = 0; i < this.positions.Length; i++)
{
newchart.positions[i] = (Position)this.positions[i].clone();
}
return newchart;
}
internal static int CalculateFn(Chart chart1, Chart chart2,int method)
{
switch(method)
{
case 0:
return nonSuited(chart1, chart2);
case 1:
return Manhattan(chart1, chart2);
default:
return nonSuited(chart1, chart2);
}
}
public bool parentContains(Chart chart)
{
if (this.parent != null)
{
if (this.parent.equals(chart))
return true;
else
return this.parent.parentContains(chart);
}
return false;
}
private void ModifyReference(Chart transNode, List<Chart> children)
{
foreach(Chart item in children)
{
bool flag1=false;
bool flag2=false;
foreach(Chart item1 in openList)
{
if(item.equals(item1))
flag1=true;
}
foreach(Chart item2 in closeList)
{
if(item.equals(item2))
flag2=true;
}
if(!flag1&&!flag2)
{
openList.Add(item);
item.parent = transNode;
item.gn = item.parent.gn + 1;
item.hn = Chart.CalculateFn((Chart)item, (Chart)goal,ComboBox2.SelectedIndex);
item.fn = item.gn + item.hn;
}
else if(flag1&&!flag2)
{
if(transNode.gn+1+item.hn<item.fn)
{
item.parent = transNode;
item.fn=transNode.gn+1+item.hn;
item.gn=transNode.gn+1;
}
}
else if(!flag1&&flag2)
{
if (transNode.gn + 1 + item.hn < item.fn)
{
item.fn = transNode.gn + 1 + item.hn;
item.gn = transNode.gn + 1;
item.parent = transNode;
openList.Add(item);
closeList.Remove(item);
}
}
}
}
private bool hit(Chart transNode)
{
if (Chart.nonSuited((Chart)transNode, (Chart)goal) == 0)
return true;
return false;
}
private void ButtonStart_Click(object sender, RoutedEventArgs e)
{
int []numForInitial=new int[9];
int []numForGoal=new int[9];
int i=0;
foreach(TextBox _textBox in uniformgrid1.Children)
{
numForInitial[i] = int.Parse(_textBox.Text);
i++;
}
i = 0;
foreach(TextBox _textBox in uniformgrid2.Children)
{
numForGoal[i] = int.Parse(_textBox.Text);
i++;
}
if (!isSolve(numForInitial, numForGoal))
{
MessageBox.Show("该情况下无解");
}
initial = new Chart(numForInitial);
goal = new Chart(numForGoal);
openList = new List<Chart>();
closeList = new List<Chart>();
//method=0,A*启发性搜索
//method=1,广度优先
int method = ComboBox1.SelectedIndex;
switch(method)
{
case 0:
//A star here;
AStar();
break;
case 1:
//BreadthFirst Here;
BreadthFirst();
break;
}
}