// ==UserScript==
// @name Sketchfab Model Downloader
// @version 1.3
// @description Download Sketchfab models
// @author ncikkis
// @include /^https?:\/\/(www\.)?sketchfab\.com\/.*/
// @require https://cdnjs.cloudflare.com/ajax/libs/jszip/3.1.5/jszip.min.js
// @require https://cdnjs.cloudflare.com/ajax/libs/jszip-utils/0.0.2/jszip-utils.min.js
// @require https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/1.3.8/FileSaver.js
// @run-at document-start
// @grant unsafeWindow
// @namespace https://greasyfork.org/users/1465318
// ==/UserScript==
(function(){
'use strict';
const window = unsafeWindow;
if (typeof saveAs === 'function') window.saveAs = saveAs;
const rDrawGeom = /(this\._stateCache\.drawGeometry\(this\._graphicContext,t\))/g;
const rDrawArrays = /t\.drawArrays\(t\.TRIANGLES,0,6\)/g;
const rRend1 = /A\.renderInto\(n,E,R/g;
const rRend2 = /g\.renderInto=function\(e,i,r/g;
const rGetResImg = /getResourceImage:function\(e,t\){/g;
let zip, folder, objects, cache, buttonInjected;
window.allmodel = [];
function reset() {
zip = new JSZip();
folder = zip.folder('collection');
objects = {};
cache = {};
}
function tryInsertButton(){
const titleSpan = document.querySelector('span.model-name__label');
if (titleSpan && !buttonInjected) {
const btn = document.createElement('button');
btn.textContent = 'Download this model';
btn.style.cssText = [
'background:#e74c3c',
'color:#fff',
'padding:10px 20px',
'border:none',
'border-radius:8px',
'font-size:16px',
'cursor:pointer',
'margin-bottom:8px',
'display:block'
].join(';');
btn.addEventListener('click', downloadAll);
titleSpan.parentNode.insertBefore(btn, titleSpan);
buttonInjected = true;
} else if (!buttonInjected) {
setTimeout(tryInsertButton, 3000);
}
}
function parseMesh(o){
const prim = [];
o._primitives.forEach(p => {
if (p && p.indices) prim.push({ mode: p.mode, indices: p.indices._elements });
});
const A = o._attributes;
const uvKey = ['TexCoord0','TexCoord1','TexCoord2','TexCoord3','TexCoord4','TexCoord5','TexCoord6','TexCoord7','TexCoord8']
.find(k => A[k]);
return {
vertex: A.Vertex._elements,
normal: A.Normal ? A.Normal._elements : [],
uv: uvKey ? A[uvKey]._elements : [],
primitives: prim
};
}
function saveMesh(m){
let s = `mtllib ${m.name}.mtl\no ${m.name}\n`;
m.obj.vertex.forEach((v,i) => { if(i%3===0) s += `v ${v} ${m.obj.vertex[i+1]} ${m.obj.vertex[i+2]}\n`; });
m.obj.normal.forEach((v,i) => { if(i%3===0) s += `vn ${v} ${m.obj.normal[i+1]} ${m.obj.normal[i+2]}\n`; });
m.obj.uv.forEach((v,i) => { if(i%2===0) s += `vt ${v} ${m.obj.uv[i+1]}\n`; });
s += 's on\n';
const hasVT = m.obj.uv.length > 0, hasVN = m.obj.normal.length > 0;
m.obj.primitives.forEach(p => {
if (p.mode === 4 || p.mode === 5) {
const strip = p.mode === 5;
for (let j = 0; j + 2 < p.indices.length; strip ? j++ : j += 3) {
s += 'f ';
let order = [0,1,2];
if (strip && (j % 2)) order = [0,2,1];
order.forEach(o => {
const idx = p.indices[j+o] + 1;
s += idx;
if (hasVT || hasVN) {
s += '/';
if (hasVT) s += idx;
if (hasVN) s += `/${idx}`;
}
s += ' ';
});
s += '\n';
}
}
});
objects[`${m.name}.obj`] = new Blob([s], { type: 'text/plain' });
}
function packageAll(){
Object.keys(objects).forEach(fn => folder.file(fn, objects[fn], { binary: true }));
const title = document.querySelector('span.model-name__label')?.textContent.trim() || 'sketchfab';
zip.generateAsync({ type: 'blob' }).then(b => saveAs(b, `${title}.zip`));
}
function downloadAll(){
reset();
window.allmodel.forEach((o,i) => saveMesh({ name: `model_${i}`, obj: parseMesh(o) }));
packageAll();
}
window.attachbody = o => {
if (!o._faked && (o._name || (o.stateset && o.stateset._name))) {
o._faked = true;
if (o._name !== "composer layer" && o._name !== "Ground - Geometry") {
window.allmodel.push(o);
}
}
};
window.drawhookcanvas = (e, mod) => {
if (!mod) return e;
let best = { size: 0 }, url = e.url;
mod.attributes.images.forEach(img => {
const ok = e.options.format === 'A' ? img.options.format === 'A' : true;
if (ok && img.size > best.size) { best = img; url = img.url; }
});
if (!cache[url]) cache[url] = { name: mod.attributes.name };
return best;
};
window.drawhookimg = (gl, t) => {
const url = t[5].currentSrc;
if (!cache[url]) return;
const w = t[5].width, h = t[5].height;
const px = new Uint8Array(w*h*4);
gl.readPixels(0,0,w,h,gl.RGBA,gl.UNSIGNED_BYTE,px);
const row = w*4;
for (let y = 0; y < h/2; y++) {
const top = y*row, bot = (h-y-1)*row;
const tmp = px.slice(top, top+row);
px.copyWithin(top, bot, bot+row);
px.set(tmp, bot);
}
const c = document.createElement('canvas');
c.width = w; c.height = h;
const cx = c.getContext('2d'), id = cx.createImageData(w,h);
id.data.set(px); cx.putImageData(id, 0, 0);
const bn = cache[url].name.replace(/\.[^.]+$/, '');
c.toBlob(b => { objects[`${bn}.png`] = b; }, 'image/png');
};
;(function(){
class E{ constructor(s){ this.script=s; this._cancel=false; } preventDefault(){ this._cancel=true; } }
const cbs = [];
window.addBeforeScriptExecuteListener = f => { if (typeof f !== 'function') throw ''; cbs.push(f); };
const disp = n => { if (n.tagName === 'SCRIPT') { const ev = new E(n); cbs.forEach(f => f(ev)); if (ev._cancel) n.remove(); } };
new MutationObserver(ms => ms.forEach(m => m.addedNodes.forEach(disp)))
.observe(document, { childList: true, subtree: true });
})();
window.onbeforescriptexecute = e => {
const s = e.script?.src || '';
if (!/web\/dist\/|standaloneViewer/.test(s)) return;
e.preventDefault();
const r = new XMLHttpRequest(); r.open('GET', s, false); r.send();
let t = r.responseText;
t = t.replace(rRend1, "$& ,i")
.replace(rRend2, "$& ,image_data")
.replace(rDrawArrays, "$& ,window.drawhookimg(t,image_data)")
.replace(rGetResImg, "$& e=window.drawhookcanvas(e,this._imageModel);")
.replace(rDrawGeom, (m, g) => g + ";window.attachbody(t);");
const s2 = document.createElement('script');
s2.text = t;
document.head.appendChild(s2);
setTimeout(tryInsertButton, 3000);
};
})();
