public void return_null_if_starting_vertex_not_in_graph()
{
var a = new Vertex <string>
{
Value = "Dog"
};
var b = new Vertex <string>
{
Value = "Dog"
};
var c = new Vertex <string>
{
Value = "Dog"
};
a.AddEdge(b);
b.AddEdge(c);
var graph = new Graph <string>();
graph.AddVertex(b);
var dfsSearcher = new DepthFirstSearcher <string>();
var result = dfsSearcher.Search(graph, a, s => s == "Dog");
result.Should().Be(null);
}
public void only_search_nodes_on_graph()
{
var a = new Vertex <string>
{
Value = "Cat"
};
var b = new Vertex <string>
{
Value = "Rat"
};
var c = new Vertex <string>
{
Value = "Dog"
};
var d = new Vertex <string>
{
Value = "Dog"
};
a.AddEdge(b);
b.AddEdge(c);
a.AddEdge(d);
var graph = new Graph <string>();
graph.AddVertex(a);
graph.AddVertex(b);
graph.AddVertex(c);
var dfsSearcher = new DepthFirstSearcher <string>();
var result = dfsSearcher.Search(graph, a, s => s == "Dog");
result.Should().Be(c);
}
public bool SearchDepthFirst(T thing)
{
if (_root == null)
{
return(false);
}
var dfs = new DepthFirstSearcher <T>();
return(dfs.Search(_root, thing));
}
public void search_depth_first()
{
var a = new Vertex <string>
{
Value = "Cat"
};
var b = new Vertex <string>
{
Value = "Rat"
};
var c = new Vertex <string>
{
Value = "Dog"
};
var d = new Vertex <string>
{
Value = "Turtle"
};
var e = new Vertex <string>
{
Value = "Parrot"
};
var f = new Vertex <string>
{
Value = "Raccoon"
};
var g = new Vertex <string>
{
Value = "Dog"
};
a.AddEdge(b);
b.AddEdge(c);
a.AddEdge(d);
d.AddEdge(e);
e.AddEdge(f);
f.AddEdge(g);
var graph = new Graph <string>();
graph.AddVertex(a);
graph.AddVertex(b);
graph.AddVertex(c);
graph.AddVertex(d);
graph.AddVertex(e);
graph.AddVertex(f);
graph.AddVertex(g);
var dfsSearcher = new DepthFirstSearcher <string>();
var result = dfsSearcher.Search(graph, a, s => s == "Dog");
result.Should().Be(g);
}
public void return_starting_vertex_if_meets_criteria()
{
var a = new Vertex <string>
{
Value = "Dog"
};
var b = new Vertex <string>
{
Value = "Dog"
};
a.AddEdge(b);
var graph = new Graph <string>();
graph.AddVertex(a);
graph.AddVertex(b);
var dfsSearcher = new DepthFirstSearcher <string>();
var result = dfsSearcher.Search(graph, a, s => s == "Dog");
result.Should().Be(a);
}
private void DfsButton_Click(object sender, EventArgs e)
{
// Without any I/D or heuristics this is the same as random search
var tree = new SearchTree <Problems.SlidingTilesPuzzle.State>(_currentState);
var dfs = new DepthFirstSearcher <Problems.SlidingTilesPuzzle.State, int>(
tree,
x => x.GetActions().RandomizeOrder(),
(x, a) => x.ApplyAction(a), // Don't need to clone because DFS is one way
(x, a) => 1,
x => x.IsSolution);
var updateCount = 0;
var start = DateTime.Now;
Action <bool> updateCounts = (force) =>
{
if (!force && ++updateCount % 10000 > 0)
{
return;
}
NodesGeneratedLabel.Text = "Generated = " + dfs.NodesGeneratedCount + " ";
ExpandedNodesLabel.Text = "Expanded = " + dfs.NodesExpandedCount + " ";
RetainedNodesLabel.Text = "Retained = " + dfs.NodesRetainedCount + " ";
SecondsLabel.Text = DateTime.Now.Subtract(start).TotalSeconds.ToString();
_currentState = dfs.CurrentNode.Data;
panel1.Invalidate();
Application.DoEvents();
};
dfs.NodeExpanded += (s, a) => updateCounts(false);
dfs.NodeGenerated += (s, a) => updateCounts(false);
var solution = dfs.Search();
updateCounts(true);
}
private void button2_Click(object sender, EventArgs e)
{
var initialState = Enumerable.Range(0, _problem.Size).Select(x => - 1).ToArray();
var tree = new SearchTree <Problems.QueensPuzzle.State>(_problem.CreateState(initialState));
var dfs = new DepthFirstSearcher <Problems.QueensPuzzle.State, int>(
tree,
GetPossibleActions,
ApplyAction,
(x, a) => 1,
x => x.IsSolution);
var updateCount = 0;
var start = DateTime.Now;
Action <bool> updateCounts = (force) =>
{
if (!force && ++updateCount % 10000 > 0)
{
return;
}
NodesGeneratedLabel.Text = "Generated = " + dfs.NodesGeneratedCount + " ";
ExpandedNodesLabel.Text = "Expanded = " + dfs.NodesExpandedCount + " ";
RetainedNodesLabel.Text = "Retained = " + dfs.NodesRetainedCount + " ";
SecondsLabel.Text = DateTime.Now.Subtract(start).TotalSeconds.ToString();
_currentState = dfs.CurrentNode.Data;
panel1.Invalidate();
Application.DoEvents();
};
dfs.NodeExpanded += (s, a) => updateCounts(false);
dfs.NodeGenerated += (s, a) => updateCounts(false);
var solution = dfs.Search();
updateCounts(true);
}
private void button2_Click(object sender, EventArgs e)
{
var initialState = Enumerable.Range(0, _problem.Size).Select(x => -1).ToArray();
var tree = new SearchTree<Problems.QueensPuzzle.State>(_problem.CreateState(initialState));
var dfs = new DepthFirstSearcher<Problems.QueensPuzzle.State, int>(
tree,
GetPossibleActions,
ApplyAction,
(x, a) => 1,
x => x.IsSolution);
var updateCount = 0;
var start = DateTime.Now;
Action<bool> updateCounts = (force) =>
{
if (!force && ++updateCount % 10000 > 0) return;
NodesGeneratedLabel.Text = "Generated = " + dfs.NodesGeneratedCount + " ";
ExpandedNodesLabel.Text = "Expanded = " + dfs.NodesExpandedCount + " ";
RetainedNodesLabel.Text = "Retained = " + dfs.NodesRetainedCount + " ";
SecondsLabel.Text = DateTime.Now.Subtract(start).TotalSeconds.ToString();
_currentState = dfs.CurrentNode.Data;
panel1.Invalidate();
Application.DoEvents();
};
dfs.NodeExpanded += (s,a) => updateCounts(false);
dfs.NodeGenerated += (s, a) => updateCounts(false);
var solution = dfs.Search();
updateCounts(true);
}
private void DfsButton_Click(object sender, EventArgs e)
{
// Without any I/D or heuristics this is the same as random search
var tree = new SearchTree<Problems.SlidingTilesPuzzle.State>(_currentState);
var dfs = new DepthFirstSearcher<Problems.SlidingTilesPuzzle.State, int>(
tree,
x => x.GetActions().RandomizeOrder(),
(x, a) => x.ApplyAction(a), // Don't need to clone because DFS is one way
(x, a) => 1,
x => x.IsSolution);
var updateCount = 0;
var start = DateTime.Now;
Action<bool> updateCounts = (force) =>
{
if (!force && ++updateCount % 10000 > 0) return;
NodesGeneratedLabel.Text = "Generated = " + dfs.NodesGeneratedCount + " ";
ExpandedNodesLabel.Text = "Expanded = " + dfs.NodesExpandedCount + " ";
RetainedNodesLabel.Text = "Retained = " + dfs.NodesRetainedCount + " ";
SecondsLabel.Text = DateTime.Now.Subtract(start).TotalSeconds.ToString();
_currentState = dfs.CurrentNode.Data;
panel1.Invalidate();
Application.DoEvents();
};
dfs.NodeExpanded += (s,a) => updateCounts(false);
dfs.NodeGenerated += (s, a) => updateCounts(false);
var solution = dfs.Search();
updateCounts(true);
}