/*
* FIXME: this algorithm shouldn't be recursive. -- andy 8 November 2007
*/
static void FloodFill(Hashtable hash, int x, int y, CheckCallback ccb, Callback cb, object tag)
{
ArrayList al = hash[x] as ArrayList;
if (al == null)
{
al = new ArrayList();
al.Add(y);
hash[x] = al;
}
else
{
if (al.Contains(y))
{
return;
}
else
{
al.Add(y);
}
}
if (ccb(x, y, tag))
{
cb(x, y, tag);
FloodFill(hash, x + 1, y, ccb, cb, tag);
FloodFill(hash, x - 1, y, ccb, cb, tag);
FloodFill(hash, x, y + 1, ccb, cb, tag);
FloodFill(hash, x, y - 1, ccb, cb, tag);
}
}
public static void FloodFill(int x, int y, CheckCallback ccb, Callback cb, object tag)
{
Hashtable hash = new Hashtable();
FloodFill(hash, x, y, ccb, cb, tag);
}
/*
* FIXME: this algorithm shouldn't be recursive. -- andy 8 November 2007
*/
static void FloodFill(Hashtable hash, int x, int y, CheckCallback ccb, Callback cb, object tag)
{
//ArrayList al = hash[x] as ArrayList;
//if (al == null) {
// al = new ArrayList();
// al.Add(y);
// hash[x] = al;
//} else {
// if (al.Contains(y)) {
// return;
// } else {
// al.Add(y);
// }
//}
//if (ccb(x, y, tag)) {
// cb(x, y, tag);
// FloodFill(hash, x + 1, y, ccb, cb, tag);
// FloodFill(hash, x - 1, y, ccb, cb, tag);
// FloodFill(hash, x, y + 1, ccb, cb, tag);
// FloodFill(hash, x, y - 1, ccb, cb, tag);
//}
}
public static void FloodFill(int x, int y, CheckCallback ccb, Callback cb, object tag)
{
Queue<Point> todo = new Queue<Point>();
Dictionary<Point,bool> map = new Dictionary<Point,bool>();
todo.Enqueue(new Point(x,y));
while (todo.Count > 0)
{
Point pt = todo.Dequeue();
if(map.ContainsKey(pt)) continue;
if (ccb(pt.X, pt.Y, tag))
{
cb(pt.X, pt.Y, tag);
todo.Enqueue(new Point(pt.X + 1, pt.Y));
todo.Enqueue(new Point(pt.X - 1, pt.Y));
todo.Enqueue(new Point(pt.X, pt.Y + 1));
todo.Enqueue(new Point(pt.X, pt.Y - 1));
}
}
}
/*
* FIXME: this algorithm shouldn't be recursive. -- andy 8 November 2007
*/
static void FloodFill(Hashtable hash, int x, int y, CheckCallback ccb, Callback cb, object tag)
{
ArrayList al = hash[x] as ArrayList;
if (al == null) {
al = new ArrayList();
al.Add(y);
hash[x] = al;
} else {
if (al.Contains(y)) {
return;
} else {
al.Add(y);
}
}
if (ccb(x, y, tag)) {
cb(x, y, tag);
FloodFill(hash, x + 1, y, ccb, cb, tag);
FloodFill(hash, x - 1, y, ccb, cb, tag);
FloodFill(hash, x, y + 1, ccb, cb, tag);
FloodFill(hash, x, y - 1, ccb, cb, tag);
}
}
public static void FloodFill(int x, int y, CheckCallback ccb, Callback cb, object tag)
{
Hashtable hash = new Hashtable();
FloodFill(hash, x, y, ccb, cb, tag);
}