Zone.prototype.sort = function sort() {
if (!this._changed) return;
this._changed = false;
var misses = [];
for (var i = 0; i < this.items.length - 1; i++) {
var current = this.items[i],
next = this.items[i + 1];
if (Item.compare(current, next) > 0) {
misses.push(next);
this.items.splice(i + 1, 1);
i--;
}
}
if (misses.length > 100) {
this.items = this.items.concat(misses);
this.items.sort(Item.compare);
} else {
for (var i = 0; i < misses.length; i++) {
this.insert(misses[i]);
}
}
};
Zone.prototype.insert = function insert(item) {
// Fast case
if (this.items.length === 0) {
this.items.push(item);
return;
}
// Binary-search + insertion
var i = 0,
j = this.items.length - 1,
middle = 0;
while (i <= j) {
middle = (i + j) >> 1;
var cmp = Item.compare(item, this.items[middle]);
if (cmp == 0) {
break;
} else if (cmp < 0) {
j = middle - 1;
} else {
i = middle + 1;
}
}
if (cmp > 0) {
middle++;
}
// Insert
this.items.splice(middle, 0, item);
};
Zone.prototype.getItemAtPos = function getItemAtPos(x, y, z) {
// Fast case
if (this.items.length === 0) return false;
// Binary-search
var cell = {
_sortId: -1,
rx: x,
ry: y,
rz: z
},
i = 0,
j = this.items.length - 1,
middle = 0;
while (i <= j) {
middle = (i + j) >> 1;
var cmp = Item.compare(cell, this.items[middle]);
if (cmp == 0) {
break;
} else if (cmp < 0) {
j = middle - 1;
} else {
i = middle + 1;
}
}
if (cmp > 0) {
middle++;
}
// Start searching from middle
for (var i = middle; i < this.items.length; i++) {
var item = this.items[i],
cmp = Item.compare(cell, item);
if (cmp > 0) break;
if (round(x) === item.rx && round(y) === item.ry && round(z) === item.rz) {
return item;
}
}
return false;
};