List <grid_node> potential_movement(grid_node n)
{
List <grid_node> p = new List <grid_node>();
p.Add(n);
foreach (grid_node nb in sg.my_neighbours(n))
{
p.Add(nb);
}
return(p);
}
//===============================Random move=====================================
//===============================Simple Greedy Move=========================
void IQ1_move()
{
/*this relatively clever movement is examine the whole grid
* and use A* to move towards the exit as well as keep distance
* with all the evadors;
*
* the Heuristic function that I am using is:
* H(n)=Manhattan(n.grid_pos,exit)-Min(Manhattan(n.grid_pos,persuer)[])
*/
int threat = 0;
grid_node candidate = null;
foreach (grid_node n in sg.my_neighbours(current_node))
{
if (sg.walkable(n) && (!n.occupied))
{
if (candidate == null)
{
candidate = n;
threat = evaluate_evador(n);
}
else
{
candidate = evaluate_evador(n) > threat?n:candidate;
}
}
}
if (candidate != null)
{
move_to_grid(sg, candidate);
if (candidate.state == SquareGrid.grid_stat.exit)
{
StageController.instance.score_evador += 1;
//remove self from board
current_node.occupied = false;
explode(Color.green);
DestroyImmediate(gameObject);
}
}
}
grid_node astar(SquareGrid sg, grid_node startNode)
{
//* the Heuristic function that I am using is:
//* Manhattan(n.grid_pos,exit)
grid_node candidate = null;
grid_node targetNode = sg.nodes.Find(n => n.state == SquareGrid.grid_stat.exit); //Is that right??
Heap <grid_node> openSet = new Heap <grid_node>(sg.Width * sg.Height); //Is that right??
//Heap<grid_node> openSet = new Heap<grid_node>(20);
//HashSet<grid_node> closedSet = new HashSet<grid_node>();
List <grid_node> closedSet = new List <grid_node>();
openSet.Add(startNode);
while (openSet.count > 0)
{
grid_node currentNode = openSet.remove_first();
closedSet.Add(currentNode);
if (currentNode == targetNode)
{
//RetracePath(startNode,targetNode);
candidate = closedSet[1]; //the next step??
break;
}
foreach (grid_node n in sg.my_neighbours(currentNode))
{
if (!sg.walkable(n) || closedSet.Contains(n) || n.occupied)
{
continue;
}
int newMovementCostToNeighbour = currentNode.gCost + Manhattan(currentNode.grid_position, n.grid_position);
if (newMovementCostToNeighbour < n.gCost || !openSet.Contains(n))
{
n.gCost = newMovementCostToNeighbour;
n.hCost = Manhattan(n.grid_position, targetNode.grid_position);
n.parent = currentNode;
if (!openSet.Contains(n))
{
openSet.Add(n);
}
}
}
}
candidate = closedSet.Count > 1?closedSet[1]:startNode;
return(candidate);
}
//This is also bullshit.
void Update()
{
if (Input.GetMouseButtonDown(0))
{
Ray r = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
if (Physics.Raycast(r, out hit))
{
grid_node n = hit.collider.gameObject.GetComponent <grid_node>();
List <grid_node> nbs = g.my_neighbours(n);
IEnumerator c = flash_them(nbs);
StartCoroutine(c);
}
}
}
grid_node next_closest_to_target(grid_node myself, grid_node target)
{
int min_dist = 0;
grid_node candidate = null;
foreach (grid_node n in sg.my_neighbours(myself))
{
if (candidate == null)
{
candidate = n;
min_dist = Manhattan(n.grid_position, target.grid_position);
}
else
{
candidate = Manhattan(n.grid_position, target.grid_position) < min_dist?n:candidate;
}
}
return(candidate);
}
