javascript:const from_s = s =>("" + s).split(" ").map(s => s.split(",").map(v => (isNaN(+v) ? 0 : +v)));const to_s = m => m.map(v => v.join(",")).join(" ");const safe_index = (m, i) => m[m.length == 1 ? 0 : i];const component_wise = f => (a, b) => {let [m, n] = a.length > b.length ? [a, b] : [b, a];return m.map((v, i) =>safe_index(n, i) == undefined ? v : f(safe_index(a, i), safe_index(b, i)));};var cursor_x = -1;var cursor_y = -1;document.onmousemove = function (event) {cursor_x = event.pageX;cursor_y = event.pageY;};const component_wise2D = f => (a, b) => component_wise(component_wise(f))(a, b);const add = component_wise((a, b) => a + b);const mul = component_wise((a, b) => a * b);const add2D = component_wise2D((a, b) => a + b);const sub2D = component_wise2D((a, b) => a - b);const mul2D = component_wise2D((a, b) => a * b);const div2D = component_wise2D((a, b) => a / b);const set = (i, m, v) => {if (m.length == 1) {if (m[0][i - 1] != undefined) m[0][i - 1] = v[0][0];} else {m[i - 1] = v[0];}return m;};const get = (i, m) => [m.length == 1 ? [m[0][i - 1]] ?? [] : m[i - 1] ?? []];const dot = (a, b) => {if (a.length == 1 && a[0].length == 3) a = a[0].map(v => [v]);return b.map(bv =>a.reduce((acc, av, i) => add(acc, mul(av, [safe_index(bv, i)])), 0));};const det = (m, i1, i2) =>m[0][i1 % 3] * m[1][i2 % 3] - m[0][i2 % 3] * m[1][i1 % 3];const cross = component_wise((a, b) =>a.map((_, i) => det([a, b], i + 1, i + 2)));const length = m => m.map(v => dot([v], [v]).map(v => Math.sqrt(v)));const normalize = m => div2D(m, length(m));const rotate = (a, v) => {a = (a[0][0] * Math.PI) / 180;v = normalize(v)[0];const s = Math.sin(a);const c = Math.cos(a);const f1 = i => c + v[i] * v[i] * (1 - c);const f2 = (i, n) => v[(i + 1) % 3] * v[(i + 2) % 3] * (1 - c) + n * v[i] * s;return [[f1(0), f2(2, 1), f2(1, -1)],[f2(2, -1), f1(1), f2(0, 1)],[f2(1, 1), f2(0, -1), f1(2)],];};const letter = i => String.fromCharCode(97 + i);const auto_block = (blockType, opcode, text, args) => ({blockType,opcode,text,arguments: Object.fromEntries(new Array(text.split("[").length - 1).fill().map((_, i) => [letter(i),{ type: (args && args[i]) || "string", defaultValue: " " },])),hideFromPalette: !0,});const mat_reporter_f = f => o =>to_s(f(...new Array(Object.entries(o).length).fill().map((_, i) => from_s(o[letter(i)]))));class ScratchMath {constructor(runtime) {this.runtime = runtime;}RunJS({ code }) {eval(code);}OpenSite({ url }) {window.open(url);}SaveFile({ name, contents }) {const a = document.createElement("a");a.download = name;a.href = `data:text/plain;charset=utf-8,${encodeURIComponent(contents)}`;a.click();}setVar({ name, val }) {eval(`${name}="${val}";`);}getReturnValOfJS({ code }) {return eval(code);}stringReport({ arg1 }) {return arg1;}whenCondition({ condit }) {return Boolean(condit);}ifBoolStringElseString({ arg1, arg2, arg3 }) {return arg1 ? arg2 : arg3;}outOfBoundsMouseX() {return cursor_x;}outOfBoundsMouseY() {return cursor_y;}getInfo() {return {id: "math",name: "Utilities",blocks: [auto_block("reporter", "Vec", "vector [a] [b] [c]"),auto_block("reporter", "Arr", "list [a] [b]"),auto_block("reporter", "Get", "item [a] of [b]"),auto_block("reporter", "Set", "with item [a] of [b] = [c]"),auto_block("reporter", "Rot", "rotate [a] around [b]", ["angle"]),{blockType: "command",opcode: "Out",text: "output [a] to [b]",arguments: {a: { type: "number", defaultValue: " " },b: { type: "string", defaultValue: " ", menu: "varMenu" },},hideFromPalette: !0,},auto_block("reporter", "Add", "[a] + [b]"),auto_block("reporter", "Sub", "[a] - [b]"),auto_block("reporter", "Mul", "[a] * [b]"),auto_block("reporter", "Div", "[a] / [b]"),auto_block("reporter", "Dot", "[a] dot [b]"),auto_block("reporter", "Cross", "[a] cross [b]"),auto_block("reporter", "Len", "length of [a]"),auto_block("reporter", "Norm", "normalize [a]"),auto_block("reporter", "Size", "size of [a]"),auto_block("reporter", "Sqrt", "sqrt of [a]"),{blockType: "command",opcode: "RunJS",text: "JS| Run JS code [code]",arguments: {code: { type: "string", defaultValue: "alert(%27Hello World!%27)" },},},"---",{blockType: "reporter",opcode: "getReturnValOfJS",text: "JS| Get return value of [code]",arguments: {code: { type: "string", defaultValue: "6473 / 84" },},},{blockType: "command",opcode: "OpenSite",text: "JS| Open site [url]",arguments: {url: { type: "string", defaultValue: "https://example.com" },},},{blockType: "command",opcode: "SaveFile",text: "JS| Save file [name] with contents [contents]",arguments: {name: { type: "string", defaultValue: "example.txt" },contents: { type: "string", defaultValue: "Hello World!" },},},{blockType: "command",opcode: "setVar",text: "JS| Set variable [name] to [val]",arguments: {name: { type: "string", defaultValue: "window.example" },val: { type: "string", defaultValue: "Hello World!" },},},"---","---",{blockType: "hat",opcode: "whenCondition",text: "when [condit] is true",isEdgeActivated: true,arguments: {condit: {type: "string",defaultValue: "Put any boolean block here",},},},{blockType: "reporter",opcode: "stringReport",text: "[arg1]",arguments: {arg1: { type: "string", defaultValue: "Hello" },},},{blockType: "reporter",opcode: "ifBoolStringElseString",text: "if [arg1] then [arg2] else [arg3]",arguments: {arg1: { type: "string", defaultValue: "Boolean here" },arg2: { type: "string", defaultValue: "Hello" },arg3: { type: "string", defaultValue: "World" },},},{blockType: "reporter",opcode: "outOfBoundsMouseX",text: "Mouse X (works out of bounds)",arguments: {},},{blockType: "reporter",opcode: "outOfBoundsMouseY",text: "Mouse Y (works out of bounds)",arguments: {},},],menus: { varMenu: "getVarMenu" },};}getVarMenu(target_id) {const vars = this.runtime.getTargetById(target_id).getAllVariableNamesInScopeByType("list");return vars.length == 0 ? [" "] : vars;}Vec({ a, b, c }) {return to_s([[a, b, c]]);}Out({ a, b }, util) {let variable = util.target.lookupOrCreateList(undefined, b);if (variable) variable.value = a.split(" ");}Get = mat_reporter_f(get);Set = mat_reporter_f(set);Arr = mat_reporter_f((a, b) => [...a, ...b]);Rot = mat_reporter_f(rotate);Add = mat_reporter_f(add2D);Sub = mat_reporter_f(sub2D);Mul = mat_reporter_f(mul2D);Div = mat_reporter_f(div2D);Dot = mat_reporter_f(dot);Cross = mat_reporter_f(cross);Len = mat_reporter_f(length);Norm = mat_reporter_f(normalize);Size = mat_reporter_f(m => [[m.length]]);Sqrt = mat_reporter_f(a =>component_wise2D((a, b) => Math.sqrt(a))(a, [[1]]));}function findReactComponent(element) {let fiber =element[Object.keys(element).find(key =>key.startsWith("__reactInternalInstance$"))];if (fiber == null) return null;const go = fiber => {let parent = fiber.return;while (typeof parent.type == "string") {parent = parent.return;}return parent;};fiber = go(fiber);while (fiber.stateNode == null) {fiber = go(fiber);}return fiber.stateNode;}window.vm = (node => { node = document.querySelector(%27div[class*=stage-header_stage-header-wrapper]%27); node = node[Object.keys(node).find(key => (key=String(key), key.startsWith(%27__reactInternal%27) || key.startsWith(%27__reactFiber%27)))].return.return.return; node = node.stateNode?.props?.vm || node.return?.updateQueue?.stores?.[0]?.value?.vm; if (!node) throw new Error(%27Could not find VM :(%27); return node; })();(function () {var extensionInstance = new ScratchMath(window.vm.extensionManager.runtime);var serviceName =window.vm.extensionManager._registerInternalExtension(extensionInstance);window.vm.extensionManager._loadedExtensions.set(extensionInstance.getInfo().id,serviceName);})();