diff --git a/packages/plugin-mirror/.babelrc b/packages/plugin-mirror/.babelrc
new file mode 100644
index 00000000000..957cae3e64d
--- /dev/null
+++ b/packages/plugin-mirror/.babelrc
@@ -0,0 +1,10 @@
+{
+ "presets": [
+ [
+ "@babel/preset-env",
+ {
+ "useBuiltIns": "entry"
+ }
+ ]
+ ]
+}
diff --git a/packages/plugin-mirror/CHANGELOG.md b/packages/plugin-mirror/CHANGELOG.md
new file mode 100644
index 00000000000..1986927eac8
--- /dev/null
+++ b/packages/plugin-mirror/CHANGELOG.md
@@ -0,0 +1,3 @@
+# Change log for: @freesewing/plugin-mirror
+
+## Unreleased
diff --git a/packages/plugin-mirror/README.md b/packages/plugin-mirror/README.md
new file mode 100644
index 00000000000..60776eb9acb
--- /dev/null
+++ b/packages/plugin-mirror/README.md
@@ -0,0 +1,99 @@
+
+
+
+ 
+ 
+ 
+
+ 
+ 
+ 
+
+
+## What am I looking at? 🤔
+
+This repository is our _monorepo_ holding [all our NPM packages](https://www.npmjs.com/search?q=keywords:freesewing).
+This folder holds **@freesewing/plugin-mirror**
+
+A FreeSewing plugin to mirror parts and points accross a line
+
+## About FreeSewing 💀
+
+Where the world of makers and developers collide, that's where you'll find FreeSewing.
+
+Our [core library](https://freesewing.dev/reference/api/) is a _batteries-included_ toolbox
+for parametric design of sewing patterns. It's a modular system (check our list
+of [plugins](https://freesewing.dev/reference/plugins/) and getting started is as simple as:
+
+```bash
+npm init freesewing-pattern
+```
+
+The [getting started](https://freesewing.dev/guides/getting-started/) section on [freesewing.dev](https://freesewing.dev/) is a good
+entrypoint to our documentation, but you'll find a lot more there, including
+our [API reference](https://freesewing.dev/reference/api/),
+as well as [our turorial](https://freesewing.dev/tutorials/pattern-design/),
+and [howtos](https://freesewing.dev/howtos/).
+
+If you're a maker, checkout [freesewing.org](https://freesewing/) where you can generate
+our sewing patterns adapted to your measurements.
+
+## Support FreeSewing: Become a patron 🥰
+
+FreeSewing is an open source project run by a community,
+and financially supported by our patrons.
+
+If you feel what we do is worthwhile, you too
+should [become a patron](https://freesewing.org/patrons/join).
+
+## Links 👩💻
+
+- 💻 Makers website: [freesewing.org](https://freesewing.org)
+- 💻 Developers website: [freesewing.dev](https://freesewing.dev)
+- 💬 Chat: [gitter.im/freesewing](https://gitter.im/freesewing/chat)
+- 🐦 Twitter: [@freesewing_org](https://twitter.com/freesewing_org)
+- 📷 Instagram: [@freesewing_org](https://instagram.com/freesewing_org)
+
+## License: MIT 🤓
+
+© [Joost De Cock](https://github.com/joostdecock).
+See [the license file](https://github.com/freesewing/freesewing/blob/develop/LICENSE) for details.
+
+## Where to get help 🤯
+
+Our [chatroom on Gitter](https://gitter.im/freesewing/chat) is the best place to ask questions,
+share your feedback, or just hang out.
+
+If you want to report a problem, please [create an issue](https://github.com/freesewing/freesewing/issues/new).
diff --git a/packages/plugin-mirror/package.json b/packages/plugin-mirror/package.json
new file mode 100644
index 00000000000..e9904495657
--- /dev/null
+++ b/packages/plugin-mirror/package.json
@@ -0,0 +1,52 @@
+{
+ "name": "@freesewing/plugin-mirror",
+ "version": "2.6.0",
+ "description": "A FreeSewing plugin to mirror paths and points accross a line",
+ "author": "Joost De Cock (https://github.com/joostdecock)",
+ "homepage": "https://freesewing.org/",
+ "repository": "github:freesewing/freesewing",
+ "license": "MIT",
+ "bugs": {
+ "url": "https://github.com/freesewing/freesewing/issues"
+ },
+ "keywords": [
+ "freesewing",
+ "plugin",
+ "sewing pattern",
+ "sewing",
+ "design",
+ "parametric design",
+ "made to measure",
+ "diy",
+ "fashion"
+ ],
+ "main": "dist/index.js",
+ "module": "dist/index.mjs",
+ "scripts": {
+ "clean": "rimraf dist",
+ "build": "npm run clean && rollup -c",
+ "test": "echo \"plugin-mirrors: No tests configured. Perhaps you'd like to do this?\" && exit 0",
+ "pubtest": "npm publish --registry http://localhost:6662",
+ "pubforce": "npm publish",
+ "symlink": "mkdir -p ./node_modules/@freesewing && cd ./node_modules/@freesewing && ln -s -f ../../../* . && cd -",
+ "start": "rollup -c -w"
+ },
+ "peerDependencies": {
+ "@freesewing/core": "^2.6.0"
+ },
+ "dependencies": {},
+ "devDependencies": {},
+ "files": [
+ "dist/*",
+ "README.md",
+ "package.json"
+ ],
+ "publishConfig": {
+ "access": "public",
+ "tag": "latest"
+ },
+ "engines": {
+ "node": ">=8.0.0",
+ "npm": ">=5"
+ }
+}
diff --git a/packages/plugin-mirror/rollup.config.js b/packages/plugin-mirror/rollup.config.js
new file mode 100644
index 00000000000..142439a7f29
--- /dev/null
+++ b/packages/plugin-mirror/rollup.config.js
@@ -0,0 +1,41 @@
+import babel from 'rollup-plugin-babel'
+import resolve from 'rollup-plugin-node-resolve'
+import commonjs from 'rollup-plugin-commonjs'
+import json from 'rollup-plugin-json'
+import minify from 'rollup-plugin-babel-minify'
+import peerDepsExternal from 'rollup-plugin-peer-deps-external'
+import { name, version, description, author, license, main, module } from './package.json'
+
+const output = [
+ {
+ file: main,
+ format: 'cjs',
+ sourcemap: true
+ }
+]
+if (typeof module !== 'undefined')
+ output.push({
+ file: module,
+ format: 'es',
+ sourcemap: true
+ })
+
+export default {
+ input: 'src/index.js',
+ output,
+ plugins: [
+ peerDepsExternal(),
+ resolve({ modulesOnly: true }),
+ commonjs(),
+ json(),
+ babel({
+ exclude: 'node_modules/**',
+ plugins: ['@babel/plugin-proposal-object-rest-spread']
+ }),
+ minify({
+ comments: false,
+ sourceMap: true,
+ banner: `/**\n * ${name} | v${version}\n * ${description}\n * (c) ${new Date().getFullYear()} ${author}\n * @license ${license}\n */`
+ })
+ ]
+}
diff --git a/packages/plugin-mirror/src/index.js b/packages/plugin-mirror/src/index.js
new file mode 100644
index 00000000000..4453ef405f8
--- /dev/null
+++ b/packages/plugin-mirror/src/index.js
@@ -0,0 +1,83 @@
+import { name, version } from '../package.json'
+
+export const lineValues = (start, end) => {
+ const { x: x1, y: y1 } = end
+ const { x: x2, y: y2 } = start
+ const c = x1 * y2 - x2 * y1
+ return [-(x1 - x2), y1 - y2, c]
+}
+
+export const mirrorGen = (start, end) => {
+ const [A, B, C] = lineValues(start, end)
+ return (point) => {
+ const { x, y } = point
+ const uNom = (B ** 2 - A ** 2) * x - 2 * A * B * y - 2 * A * C
+ const vNom = (A ** 2 - B ** 2) * y - 2 * A * B * x - 2 * B * C
+ const denom = A ** 2 + B ** 2
+ return [uNom / denom, vNom / denom]
+ }
+}
+
+export default {
+ name: name,
+ version: version,
+ hooks: {
+ preRender: function (svg) {
+ if (svg.attributes.get('freesewing:plugin-mirror') === false)
+ svg.attributes.set('freesewing:plugin-mirror', version)
+ }
+ },
+ macros: {
+ macros: {
+ mirror: function ({
+ mirror,
+ clone = true,
+ points = null,
+ paths = null,
+ prefix = 'mirrored',
+ nameFormat // unimplemented
+ }) {
+ const [start, end] = mirror
+ const mirrorPoint = mirrorGen(start, end)
+ const ops = ['from', 'to', 'cp1', 'cp2']
+
+ if (paths !== null) {
+ paths.forEach((path) => {
+ // find existing path id
+ // Find point name from path by looking in the list of all points?
+ let foundId = null
+ for (let id of Object.keys(this.paths)) {
+ if (this.paths[id] === path) {
+ foundId = id
+ break
+ }
+ }
+ if (clone && foundId !== null) {
+ path = clone ? path.clone() : path
+ this.paths[`${prefix}${foundId}`] = path
+ }
+ for (let op in path.ops) {
+ for (let type of ops) {
+ // Iterate over all possible path op points and clone/move point
+ const pathOp = path.ops[op][type]
+ if (typeof pathOp !== 'undefined') {
+ ;[pathOp.x, pathOp.y] = mirrorPoint(pathOp)
+ pathOp.attributes.set('mirrored', true)
+ }
+ }
+ }
+ })
+ }
+ if (points !== null) {
+ points.forEach((point) => {
+ if (clone) {
+ point = point.clone()
+ }
+ ;[point.x, point.y] = mirrorPoint(point)
+ point.attributes.set('mirrored', true)
+ })
+ }
+ }
+ }
+ }
+}
diff --git a/packages/plugin-mirror/tests/mirror.test.js b/packages/plugin-mirror/tests/mirror.test.js
new file mode 100644
index 00000000000..383d1589f1d
--- /dev/null
+++ b/packages/plugin-mirror/tests/mirror.test.js
@@ -0,0 +1,12 @@
+import freesewing from 'freesewing'
+import { version } from '../package.json'
+let chai = require('chai')
+let expect = chai.expect
+chai.use(require('chai-string'))
+let plugin = require('../dist/index.js')
+
+it('Should set the plugin name:version attribute', () => {
+ let pattern = new freesewing.Pattern().with(plugin)
+ pattern.render()
+ expect(pattern.svg.attributes.get('freesewing:plugin-mirror')).to.equal(version)
+})