Smorf.nl Model Extractor - Userscript for TamperMonkey. This simple tool will add a download button to model pages on smorf.nl and allow direct downloading of any crystal form you like.

smorfDownloaderUserscript.js

// ==UserScript==
// @name         Smorf Downloader
// @namespace    http://tampermonkey.net/
// @version      2024-06-11
// @description  Adds a Download STL button to Smorf.nl
// @author       SirCode
// @match        https://www.smorf.nl/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=smorf.nl
// @grant        unsafeWindow
// ==/UserScript==

(function() {
    "use strict";
    JSC3D.Scene.prototype.getChild = function(a) {
        unsafeWindow.scene = this;
        return this.children[a];
    };
    window.addEventListener("load", function () {
        // Inject into a common function in JSC3D to send the scene back to the extension
            // Ugly code from old smorf editor page. Not my downloader, just adapted and cleaned up to work on normal smorf pages.
        unsafeWindow.downloadstl = function() {
            for (var a = "solid smorf\n",
                    b = scene.children[0].indexBuffer,
                    f = 0,
                    g = 1,
                    e = 2,
                    k = scene.children[0].faceNormalBuffer,
                    l = 0,
                    c = scene.children[0].vertexBuffer,
                    d; e < b.length;
            ) {
                for (; - 1 != b[e];)
                    (a += "facet normal " + k[l].toFixed(4) + " " + k[l + 1].toFixed(4) + " " + k[l + 2].toFixed(4) + "\nouter loop\n"),
                    (d = 3 * b[f]),
                    (a += "vertex " + c[d].toFixed(4) + " " + c[d + 1].toFixed(4) + " " + c[d + 2].toFixed(4) + "\n"),
                    (d = 3 * b[g]),
                    (a += "vertex " + c[d].toFixed(4) + " " + c[d + 1].toFixed(4) + " " + c[d + 2].toFixed(4) + "\n"),
                    (d = 3 * b[e]),
                    (a += "vertex " + c[d].toFixed(4) + " " + c[d + 1].toFixed(4) + " " + c[d + 2].toFixed(4) + "\n"),
                    (a += "endloop\nendfacet\n"),
                    g++,
                    e++;
                f = e + 1;
                g = f + 1;
                e = g + 1;
                l += 3;
            }
            a += "endsolid smorf\n";
            // Old-style click-to-download
            b = document.createElement("a");
            b.setAttribute("href", "data:text/plain;charset=utf-8," + encodeURIComponent(a));
            let el = document.querySelector("#naam > table:nth-child(1) > tbody:nth-child(1) > tr:nth-child(1) > td:nth-child(2)");
            b.setAttribute("download", `${el.innerText}.stl`);
            b.style.display = "none";
            document.body.appendChild(b);
            b.click();
            document.body.removeChild(b);
        };
        // Add button to smorf menu to make use of the aforementioned downloader code
        let btn = document.createElement("input");
        btn.setAttribute("type", "button");
        btn.setAttribute("onclick", "downloadstl()");
        btn.value = "Download STL";
        document.querySelector("#selects_buttons").append(btn);
    }, false);
})();