node-anvil

Simple package that can write region files in the Minecraft anvil file format

Only supports 1.14 and reading support is planned

Installation

npm install node-anvil

Usage

const anvil = require('node-anvil');

let region = new anvil.Region(0, 0);

// 10x10 grass block platform
region.fill(new anvil.Block('minecraft', 'grass_block'), 0, 0, 0, 9, 0, 9);

// Fill mapping
let blocks = [
    new anvil.Block('minecraft', 'stone'),
    new anvil.Block('minecraft', 'dirt')
];
region.fill((x, y, z) => {
    return blocks[Math.floor(Math.random() * blocks.length)];
}, 0, 0, 10, 5, 5, 15);

// Oak log facing up
region.setBlock(new anvil.Block('minecraft', 'oak_log', { axis: 'y' }), 0, 1, 0);

// Persistent oak leaves on top of it
region.setBlock(new anvil.Block('minecraft', 'oak_leaves', { persistent: true }), 0, 2, 0);

// Tall grass consists of two tall_grass blocks, one with half: 'lower', and the other with half: 'upper'
region.setBlock(new anvil.Block('minecraft', 'tall_grass', { half: 'lower' }), 1, 1, 1);
region.setBlock(new anvil.Block('minecraft', 'tall_grass', { half: 'upper' }), 1, 2, 1);

// save() returns a Buffer with the data, but you can provide a file and it'll save there
region.save('r.0.0.mca');