---
title: '@freesewing/core'
---
import { cbqc, hidePresets, goldenRatio, version } from '@freesewing/core'
FreeSewing's **core** package holds the core library for parametric design
of sewing patterns.
It is published on NPM as [@freesewing/core
](https://www.npmjs.com/package/@freesewing/core).\
The source code for this package is available in [our monorepo on Codeberg
](https://codeberg.org/freesewing/freesewing) under [packages/core
](https://codeberg.org/freesewing/freesewing/src/branch/develop/packages/core).
:::tip
Refer to [the core API reference documentation](/reference/api) for in-depth
info on how to use this package.
:::
:::note
This package does not provide a default export.
:::
## Installation
```sh
npm install --save @freesewing/core
```
## Named Exports
### Attributes
The constructor method for [Attributes](/reference/api/attributes/).
```js
import { Attributes } from '@freesewing/core'
```
### beamIntersectsCircle
The [beamIntersectsCircle](/reference/api/utils/beamintersectscircle/) function.
```js
import { beamIntersectsCircle } from '@freesewing/core'
```
### beamIntersectsCurve
The [beamIntersectsCurve](/reference/api/utils/beamintersectscurve/) function.
```js
import { beamIntersectsCurve } from '@freesewing/core'
```
### beamIntersectsX
The [beamIntersectsX](/reference/api/utils/beamintersectsx/) function.
```js
import { beamIntersectsX } from '@freesewing/core'
```
### beamIntersectsY
The [beamIntersectsY](/reference/api/utils/beamintersectsy/) function.
```js
import { beamIntersectsY } from '@freesewing/core'
```
### beamsIntersect
The [beamsIntersect](/reference/api/utils/beamsintersect/) function.
```js
import { beamsIntersect } from '@freesewing/core'
```
### Bezier
A copy of the [BezierJs](https://www.npmjs.com/package/bezier-js) library.
```js
import { Bezier } from '@freesewing/core'
```
### capitalize
The [capitalize](/reference/api/utils/capitalize/) function.
```js
import { capitalize } from '@freesewing/core'
```
### cbqc
The [cbqc](/reference/api/utils/cbqc/) number, which is the ideal value
to approximate a quarter circle with a cubic Bezier curve.
:::tip
**cbqc** stands for Cubic Bezier Quarter Circle
:::
```js
import { capitalize } from '@freesewing/core'
```
<ConsoleButton data={cbqc} />
### circlesIntersect
The [circlesIntersect](/reference/api/utils/circlesintersect/) function.
```js
import { circlesIntersect } from '@freesewing/core'
```
### curveEdge
The [curveEdge](/reference/api/utils/curveedge/) function.
```js
import { curveEdge } from '@freesewing/core'
```
### curveIntersectsX
The [curveIntersectsX](/reference/api/utils/curveintersectsx/) function.
```js
import { curveIntersectsX } from '@freesewing/core'
```
### curveIntersectsY
The [curveIntersectsY](/reference/api/utils/curveintersectsy/) function.
```js
import { curveIntersectsY } from '@freesewing/core'
```
### curvesIntersect
The [curvesIntersect](/reference/api/utils/curvesintersect/) function.
```js
import { curvesIntersect } from '@freesewing/core'
```
### deg2rad
The [deg2rad](/reference/api/utils/deg2rad/) function.
```js
import { deg2rad } from '@freesewing/core'
```
### Design
The constructor method for [Design](/reference/api/design/).
```js
import { Design } from '@freesewing/core'
```
### generateStackTransform
The [generateStackTransform](/reference/api/utils/generatestacktransform/) function.
```js
import { generateStackTransform } from '@freesewing/core'
```
### getTransformedBounds
The [getTransformedBounds](/reference/api/utils/gettransformedbounds/) function.
```js
import { getTransformedBounds } from '@freesewing/core'
```
### goldenRatio
The [goldenRatio](/reference/api/utils/goldenratio/) number, which is the ideal value
to approximate a quarter circle with a cubic Bezier curve.
<ConsoleButton data={goldenRatio} />
### hidePresets
The [hidePresets](/reference/api/utils/hidepresets) object holds presets for
hiding parts in a FreeSewing design.
```js
import { hidePresets } from '@freesewing/core'
```
<ConsoleButton data={hidePresets} />
### lineIntersectsCircle
The [lineIntersectsCircle](/reference/api/utils/lineintersectscircle/) function.
```js
import { lineIntersectsCircle } from '@freesewing/core'
```
### lineIntersectsCurve
The [lineIntersectsCurve](/reference/api/utils/lineintersectscurve/) function.
```js
import { lineIntersectsCurve } from '@freesewing/core'
```
### linesIntersect
The [linesIntersect](/reference/api/utils/linesintersect/) function.
```js
import { linesIntersect } from '@freesewing/core'
```
### mergeI18n
The [mergeI18n](/reference/api/utils/mergei18n/) function.
```js
import { mergeI18n } from '@freesewing/core'
```
### mergeOptions
The [mergeOptions](/reference/api/utils/mergeoptions/) function.
```js
import { mergeOptions } from '@freesewing/core'
```
### Part
The constructor method for [Part](/reference/api/part/).
```js
import { Part } from '@freesewing/core'
```
### Path
The constructor method for [Path](/reference/api/path/).
```js
import { Path } from '@freesewing/core'
```
### Pattern
The constructor method for [Pattern](/reference/api/pattern/).
```js
import { Pattern } from '@freesewing/core'
```
### pctBasedOn
The [pctBasedOn](/reference/api/utils/pctbasedon/) function.
```js
import { pctBasedOn } from '@freesewing/core'
```
### Point
The constructor method for [Point](/reference/api/point/).
```js
import { Point } from '@freesewing/core'
```
### pointOnBeam
The [pointOnBeam](/reference/api/utils/pointonbeam/) function.
```js
import { pointOnBeam } from '@freesewing/core'
```
### pointOnCurve
The [pointOnCurve](/reference/api/utils/pointoncurve/) function.
```js
import { pointOnCurve } from '@freesewing/core'
```
### pointOnLine
The [pointOnLine](/reference/api/utils/pointonline/) function.
```js
import { pointOnLine } from '@freesewing/core'
```
### rad2deg
The [rad2deg](/reference/api/utils/rad2deg/) function.
```js
import { rad2deg } from '@freesewing/core'
```
### round
The [round](/reference/api/utils/round/) function.
```js
import { round } from '@freesewing/core'
```
### Snippet
The constructor method for [Snippet](/reference/api/snippet/).
```js
import { Snippet } from '@freesewing/core'
```
### splitCurve
The [splitCurve](/reference/api/utils/splitcurve/) function.
```js
import { splitCurve } from '@freesewing/core'
```
### Store
The constructor method for [Store](/reference/api/store/).
```js
import { Store } from '@freesewing/core'
```
### stretchToScale
The [stretchToScale](/reference/api/utils/stretchtoscale/) function.
```js
import { stretchToScale } from '@freesewing/core'
```
### units
The [units](/reference/api/utils/units/) function.
```js
import { units } from '@freesewing/core'
```
### version
The version of the FreeSewing core library.
```js
import { version } from '@freesewing/core'
```
<ConsoleButton data={version} />
