Item.prototype.setPosition = function setPosition(x, y, z) {
this.x = x;
this.y = y;
this.z = z;
this.rx = round(x);
this.ry = round(y);
this.rz = round(z);
// Move map if player has moved
this.ui.handleMove(this);
// Cache new projection point
var p = this.ui.project(x, y, z);
this.projectionX = p.x;
this.projectionY = p.y;
// And projection of rounded point
var p = this.ui.project(this.rx, this.ry, this.rz);
this.projectionRX = p.x;
this.projectionRY = p.y;
// Update sprite position
this.spriteX = this.projectionX - this.sprite.x;
this.spriteY = this.projectionY - this.sprite.y;
this.spriteRight = this.spriteX + this.spriteWidth;
this.spriteBottom = this.spriteY + this.spriteHeight;
// Force rerender
this.ui._changed = true;
this.zone._changed = true;
};
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;
};