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[Math] Create Types.swift

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This commit is contained in:
Eryn Wells 2015-11-06 08:15:23 -08:00
parent 204606d256
commit 94b12cc2ba
2 changed files with 35 additions and 0 deletions
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8
Math/Math.xcodeproj/project.pbxproj
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@ -12,6 +12,8 @@
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C005E0391BE1CC7A00F1BD3C /* Matrix.swift in Sources */ = {isa = PBXBuildFile; fileRef = C005E0381BE1CC7A00F1BD3C /* Matrix.swift */; };
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@ -33,6 +35,8 @@
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@ -78,6 +82,7 @@
C005DFFD1BE1CBA700F1BD3C /* Math.h */,
C005E0381BE1CC7A00F1BD3C /* Matrix.swift */,
C04449C01BE26A0700ABF046 /* Vector.swift */,
C08C72031BED08900030AD52 /* Types.swift */,
C005DFFF1BE1CBA700F1BD3C /* Info.plist */,
);
path = Math;
@ -87,6 +92,7 @@
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C005E0091BE1CBA800F1BD3C /* MatrixTests.swift */,
C08C72011BED07BB0030AD52 /* MatrixFunctionalTests.swift */,
C005E00B1BE1CBA800F1BD3C /* Info.plist */,
);
path = MathTests;
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@ -210,6 +217,7 @@
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};

27
Math/Math/Types.swift Normal file
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@ -0,0 +1,27 @@
//
// Types.swift
// Math
//
// Created by Eryn Wells on 11/6/15.
// Copyright © 2015 Eryn Wells. All rights reserved.
//
import Foundation
public typealias Float = Swift.Float
/** Acceptable tolerance for Float equality. */
let Epsilon: Float = 1e-6
extension Float {
/** Test that `other` is almost equal (i.e. within the +/- Epsilon) to `self`. */
func almostEqual(other: Float) -> Bool {
return other >= (self - Epsilon) && other <= (self + Epsilon)
}
}
/** Custom operator for almost-equality of floats. */
infix operator =~ { associativity left precedence 130 }
public func =~(lhs: Float, rhs: Float) -> Bool {
return lhs.almostEqual(rhs)
}