SwiftCubicSpline

Usage

To run the example project, clone the repo, and run pod install from the Example directory first.

Requirements

Installation

SwiftCubicSpline is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "SwiftCubicSpline"

Example

let spline = CubicSpline(points: [
    Point(x: 0.0, y: 0.5),
    Point(x: 0.1, y: 0.5),
    Point(x: 0.2, y: 0.7),
    Point(x: 0.4, y: 0.3),
    Point(x: 0.6, y: 0.6),
    Point(x: 0.8, y: 0.4),
    Point(x: 0.9, y: 0.5),
    Point(x: 1.0, y: 0.5)
    ])

let graphSize = self.bounds.size
for y in 0 ..< Int(graphSize.height) {
    let y = Double(y)
    let x = spline[x: y/Double(graphSize.height)] * Double(graphSize.width)

    if y == 0 {
        context.move(to: CGPoint(x: x, y: y))
    } else {
        context.addLine(to: CGPoint(x: x, y: y))
    }
}
context.strokePath()

screenshot

Author

giordano scalzo, giordano.scalzo@gmail.com

Credits

Based on SAMCubicSpline and CubicSpline

License

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