main.js

import * as THREE from 'three';
import WebGL from 'three/addons/capabilities/WebGL.js';
import {ModelLoader, ResourceManager, ResourcePack} from "@xmcl/resourcepack";
import {BasicTextureManager, BlockModelFactory} from "@xmcl/model/dist";

if (!WebGL.isWebGLAvailable()){
    const warning = WebGL.getWebGLErrorMessage();
    document.getElementById( 'container' ).appendChild( warning );
    throw warning;
}

const scene = new THREE.Scene();
//const camera = new THREE.OrthographicCamera(window.innerWidth / - 2, window.innerWidth / 2, window.innerHeight / 2, window.innerHeight / - 2, .1, 1000)
const camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 );

const renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );

const geometry = new THREE.BoxGeometry( 1, 1, 1 );
const material = new THREE.MeshBasicMaterial( { color: 0x00ff00 } );
const cube = new THREE.Mesh( geometry, material );
scene.add( cube );

//camera.position.z = 100;
camera.position.z = 5;


async function loadPack(url){
    return ResourcePack.open(new Uint8Array(await (await fetch(url)).arrayBuffer()));
}

const man = new ResourceManager();
const textureRegistry = new BasicTextureManager ();
const factory = new BlockModelFactory(textureRegistry);
const loader = new ModelLoader(man);
let loaded_pack = false;
let o3d;
const res= loadPack("client-1.20.4.jar").then(async pack => {
    loaded_pack = true;
    await man.addResourcePack(pack);
    await loader.loadModel("block/grass_block");

    console.log(loader.models);

    o3d = factory.getObject(loader.models["minecraft:models/block/grass_block.json"]);
    scene.add(o3d);
    console.log(o3d);
    console.log(cube);
})

function animate(){
    requestAnimationFrame(animate);
    if(loaded_pack){
        //console.log(o3d);
    }
    cube.rotation.x += 0.01;
    cube.rotation.y += 0.01;
    renderer.render(scene, camera);
}
animate();