bezierpath-length

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bezierpath-length

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A simple API to get the length of a CGPath, UIBezierPath or NSBezierPath, written in Swift.

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# [UI/NS]BezierPath + Length

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This project provides a simple API to get the length of either a ```UIBezierPath``` or ```NSBezierPath```. Example:

```swift
let rect = CGRect(origin: .zero, size: CGSize(width: 100, height: 300))
let path = UIBezierPath(ovalIn: rect)

// Length in pt.
let length = path.length
```

There's also an API for getting a point on a path at a certain percentage, example:

```swift
// CGPoint at 50% of path
let point = path.point(at: 0.5)
```

## Requirements

* iOS 8.0+ / macOS 10.9+ / tvOS 9.0+ / watchOS 2.0+
* Xcode 9.0+

## Installation

### [CocoaPods](http://cocoapods.org)

To install, add the following line to your ```Podfile```:

```ruby
pod 'BezierPathLength', '~> 1.0.0'
```

## How does it work?

The actual calculations are implemented on a ```CGPath``` extension, but a ```[UI/NS]BezierPath``` extension is available for convenience.

Any ```CGPath``` can be split into subpaths. Of which there are three types:

* Linear
* Quadratic curve
* Cubic curve
 
 
See [calculations.md](calculations.md) for a detailed mathematical explanation of how the length of these three can be calculated.

## License

This project is available under the MIT license. See the LICENSE file for more info.

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