How to create a thread in XNA for pathfinding?
- by Dan
I am trying to create a separate thread for my enemy's A* pathfinder which will give me a list of points to get to the player. I have placed the thread in the update method of my enemy. However this seems to cause jittering in the game every-time the thread is called.
I have tried calling just the method and this works fine. Is there any way I can sort this out so that I can have the pathfinder on its own thread? Do I need to remove the thread start from the update and start it in the constructor? Is there any way this can work?
Here is the code at the moment:
bool running = false;
bool threadstarted;
System.Threading.Thread thread;
public void update()
{
if (running == false && threadstarted == false)
{
thread = new System.Threading.Thread(PathThread);
//thread.Priority = System.Threading.ThreadPriority.Lowest;
thread.IsBackground = true;
thread.Start(startandendobj);
//PathThread(startandendobj);
threadstarted = true;
}
}
public void PathThread(object Startandend)
{
object[] Startandendarray = (object[])Startandend;
Point startpoint = (Point)Startandendarray[0];
Point endpoint = (Point)Startandendarray[1];
bool runnable = true;
// Path find from 255, 255 to 0,0 on the map
foreach(Tile tile in Map)
{
if(tile.Color == Color.Red)
{
if (tile.Position.Contains(endpoint))
{
runnable = false;
}
}
}
if(runnable == true)
{
running = true;
Pathfinder p = new Pathfinder(Map);
pathway = p.FindPath(startpoint, endpoint);
running = false;
threadstarted = false;
}
}
