//----------------------------------------------------------------------------
// Constructor
//----------------------------------------------------------------------------
public PathValue(int score_g, int heuristic, Vector3 centre, IHexagon hex, PathValue previous)
{
Score_g = score_g;
Heuristic = heuristic;
Centre = centre;
Hex = hex;
Previous = previous;
}
//----------------------------------------------------------------------------
// Get Path Value
//----------------------------------------------------------------------------
/// <summary>
/// GetPathValue checks if a hex has been visited before. <para/>
/// If it has, return the original PathValue <para/>
/// Otherwise, construct a new PathValue
///
/// </summary>
public IPathValue GetPathValue(IHexagon hex)
{
if (PathValueDict.ContainsKey(hex))
{
return(PathValueDict[hex]);
}
else
{
Vector3 centre = (Destination.HexTransform.position + Start.HexTransform.position) / 2;
IPathValue myPath = new PathValue(400000, HexMath.FindDistance(hex, Destination), centre, hex, null);
PathValueDict.Add(hex, myPath);
return(myPath);
}
}
/// <summary>
/// The path values have the path stored as a reverse linked list <para />
/// This reverses it, and constructs a MapPath <para />
/// MapPath is currently unimportant, but will hopefully allow ai to make good decisions with movement
/// </summary>
public MapPath ReconstructPath()
{
MapPath myMapPath = new MapPath();
myMapPath.cost = Score_g;
PathValue currentPath = this;
while (currentPath != null)
{
myMapPath.PathStack.Push(currentPath.Hex);
currentPath = currentPath.Previous;
}
return(myMapPath);
}
//----------------------------------------------------------------------------
// IComparable
//----------------------------------------------------------------------------
#region IComparable
public int CompareTo(object obj)
{
if (obj == null)
{
return(1);
}
PathValue otherPathValue = (PathValue)obj;
if (otherPathValue != null)
{
return(PathCompare(this, otherPathValue));
}
else
{
throw new ArgumentException("Object is not a PathValue");
}
}
private int PathCompare(PathValue a, PathValue b)
{
if (a.Score_f < b.Score_f)
{
return(-1);
}
else if (a.Score_f > b.Score_f)
{
return(1);
}
//here's where the euclidean distance comparison kicks in
else if (Vector3.Distance(a.Hex.HexTransform.position, Centre) < Vector3.Distance(b.Hex.HexTransform.position, Centre))
{
return(-1);
}
else if (Vector3.Distance(a.Hex.HexTransform.position, Centre) > Vector3.Distance(b.Hex.HexTransform.position, Centre))
{
return(1);
}
else
{
return(Vec3IntExt.Vec3IntCompare(a.Hex.MyHexMap.CoOrds, b.Hex.MyHexMap.CoOrds));
}
}
/// <summary>
/// If a shorter path to a hex is found <para/>
/// You should update the path to it (previous), and the new cost to this node (score_g)
/// </summary>
/// <param name="score_g"></param>
/// <param name="previous"></param>
public void UpdateValues(int score_g, IPathValue previous)
{
Score_g = score_g;
Previous = (PathValue)previous;
}