71 lines
2.3 KiB
Swift
71 lines
2.3 KiB
Swift
//
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// CGPointExtensions.swift
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// EZSwiftExtensions
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//
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// Created by Sanyal, Arunav on 10/29/16.
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// Copyright © 2016 Goktug Yilmaz. All rights reserved.
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//
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#if os(iOS) || os(tvOS)
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import UIKit
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import Foundation
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extension CGPoint {
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/// EZSE: Constructor from CGVector
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public init(vector: CGVector) {
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self.init(x: vector.dx, y: vector.dy)
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}
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/// EZSE : Constructor from CGFloat
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public init(angle: CGFloat) {
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self.init(x: cos(angle), y: sin(angle))
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}
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/// EZSE: Adds two CGPoints.
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public static func + (this: CGPoint, that: CGPoint) -> CGPoint {
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return CGPoint(x: this.x + that.x, y: this.y + that.y)
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}
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/// EZSE: Subtracts two CGPoints.
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public static func - (left: CGPoint, right: CGPoint) -> CGPoint {
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return CGPoint(x: left.x - right.x, y: left.y - right.y)
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}
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/// EZSE: Multiplies a CGPoint with a scalar CGFloat.
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public static func * (point: CGPoint, scalar: CGFloat) -> CGPoint {
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return CGPoint(x: point.x * scalar, y: point.y * scalar)
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}
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/// EZSE: Calculates the distance between two CG Points.
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/// Inspired by : http://stackoverflow.com/questions/1906511/how-to-find-the-distance-between-two-cg-points
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public static func distance(from: CGPoint, to: CGPoint) -> CGFloat {
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return sqrt(pow(to.x - from.x, 2) + pow(to.y - from.y, 2))
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}
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/// EZSE: Normalizes the vector described by the CGPoint to length 1.0 and returns the result as a new CGPoint.
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public func normalized() -> CGPoint {
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let len = CGPoint.distance(from: self, to: CGPoint.zero)
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return CGPoint(x: self.x / len, y: self.y / len)
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}
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//// EZSE: Returns the angle represented by the point.
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public var angle: CGFloat {
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return atan2(y, x)
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}
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//// EZSE: Returns the dot product of two vectors represented by points
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public static func dotProduct(this: CGPoint, that: CGPoint) -> CGFloat {
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return this.x * that.x + this.y * that.y
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}
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/// EZSE: Performs a linear interpolation between two CGPoint values.
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/// Inspired by https://github.com/raywenderlich/SKTUtils/blob/master/SKTUtils/CGPoint%2BExtensions.swift
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public static func linearInterpolation(startPoint: CGPoint, endPoint: CGPoint, interpolationParam: CGFloat) -> CGPoint {
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return startPoint + (endPoint - startPoint) * interpolationParam
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}
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}
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#endif
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