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async function placeItem(bot, name, position) {
// return if name is not string
if (typeof name !== "string") {
throw new Error(`name for placeItem must be a string`);
}
// return if position is not Vec3
if (!(position instanceof Vec3)) {
throw new Error(`position for placeItem must be a Vec3`);
}
const itemByName = mcData.itemsByName[name];
if (!itemByName) {
throw new Error(`No item named ${name}`);
}
const item = bot.inventory.findInventoryItem(itemByName.id);
if (!item) {
bot.chat(`No ${name} in inventory`);
return;
}
const item_count = item.count;
// find a reference block
const faceVectors = [
new Vec3(0, 1, 0),
new Vec3(0, -1, 0),
new Vec3(1, 0, 0),
new Vec3(-1, 0, 0),
new Vec3(0, 0, 1),
new Vec3(0, 0, -1),
];
let referenceBlock = null;
let faceVector = null;
for (const vector of faceVectors) {
const block = bot.blockAt(position.minus(vector));
if (block?.name !== "air") {
referenceBlock = block;
faceVector = vector;
bot.chat(`Placing ${name} on ${block.name} at ${block.position}`);
break;
}
}
if (!referenceBlock) {
bot.chat(
`No block to place ${name} on. You cannot place a floating block.`
);
_placeItemFailCount++;
if (_placeItemFailCount > 10) {
throw new Error(
`placeItem failed too many times. You cannot place a floating block.`
);
}
return;
}
// You must use try catch to placeBlock
try {
// You must first go to the block position you want to place
await bot.pathfinder.goto(new GoalPlaceBlock(position, bot.world, {}));
// You must equip the item right before calling placeBlock
await bot.equip(item, "hand");
await bot.placeBlock(referenceBlock, faceVector);
bot.chat(`Placed ${name}`);
bot.save(`${name}_placed`);
} catch (err) {
const item = bot.inventory.findInventoryItem(itemByName.id);
if (item?.count === item_count) {
bot.chat(
`Error placing ${name}: ${err.message}, please find another position to place`
);
_placeItemFailCount++;
if (_placeItemFailCount > 10) {
throw new Error(
`placeItem failed too many times, please find another position to place.`
);
}
} else {
bot.chat(`Placed ${name}`);
bot.save(`${name}_placed`);
}
}
}
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