Metron alternatives and similar libraries
Based on the "Math" category.
Alternatively, view Metron alternatives based on common mentions on social networks and blogs.

VectorMath
A Swift library for Mac and iOS that implements common 2D and 3D vector and matrix functions, useful for games or vectorbased graphics 
SwiftMath
DISCONTINUED. 📐 A math framework for Swift. Includes: vectors, matrices, complex numbers, quaternions and polynomials. 
SwiftMathEagle
A general math framework to make using math easy. Currently supports function solving and optimisation, matrix and vector algebra, complex numbers, big int, big frac, big rational, graphs and general handy extensions and functions.
InfluxDB  Purpose built for realtime analytics at any scale.
* Code Quality Rankings and insights are calculated and provided by Lumnify.
They vary from L1 to L5 with "L5" being the highest.
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README
[](documentation/asset/metron_header.jpg)
Metron
Geometry, simplified.
Metron is a comprehensive collection of geometric functions and types that extend the 2D geometric primitives provided by CoreGraphics. Completely written in Swift, Metron allows you to express complex geometric calculations in very intuitive statements:
Example 1.
Circle(in: viewFrame).contains(touchPoint)
↳ creates a Circle
that fits (centered) inside viewFrame
, and checks if the touchPoint
is inside that circle.
Example 2.
(Angle(.pi) + Angle(270, unit: .degrees)).normalized // Angle of 0.5pi (90°)
↳ adds two Angles
, one expressed in radians (default) and one in degrees. The sum is normalized to within 0 and 2𝛑 radians (or 0 and 360 degrees).
Example 3.
LineSegment(a: startPoint, b: currentPoint).intersection(with: viewFrame.lineSegment(for: minYEdge))
↳ creates a LineSegment
between a (touch) start point and current point, and returns the intersection with the minYEdge
of a view's frame (if these line segments indeed intersect).
Example 4.
let rotatedPoints = viewFrame.points.map { $0.applying(rotationTransform, anchorPoint: rotationPoint) }
let path: CGPath = Polygon(points: rotatedPoints).path
↳ maps each corner point of a view's frame (a CGRect
) to a point to which a rotationTransform
is applied, taking rotationPoint
as the anchor point for the transform.
With these points, a Polygon
is initialized, representing the rotated rectangular frame of the view. From that polygon, we derive a CGPath
that can then be drawn.
And there's much more...
Extensions
For CGPoint
 [X] Distance to other
CGPoint
 [X] Clipping to
CGRect
 [X] Relative position in
CGRect
 [X] Normalized position in
CGRect
 [X] Convert to
CGVector
 [X] Round to nondecimal components
 [X] Addition, subtraction, multiplication...
 [X] Convex hull for an array of
CGPoints
(returns aPolygon
)
For CGVector
 [X] Magnitude
 [X] Angle
 [X] Convenience initializer with magnitude and angle
 [X] Convert to
CGPoint
 [X] Inverse
 [X] Dominant edge
 [X] Dominant corner
 [X] Derive line through point
 [X] Derive line segment from point
 [X]
CGAffineTransform
extensions  [X] Addition, subtraction, multiplication...
For CGSize
 [X] Area
 [X] Swap width and height
 [X] Clip to other
CGSize
 [X] Scaling using multiplication and division
For CGRect
 [X] Many convenience initializers, including AspectFit / AspectFill for size
 [X] Scaling
 [X] Corner points
 [X] Edges as line segments
 [X] Area
 [X] Center
 [X] Perimeter
 [X]
CGPath
For CGRectEdge
 [X] Axis (x or y)
 [X] Adjacent corners
 [X] Opposite edge
For CGAffineTransform
 [X] Create translation transform using
CGVector
 [X] Apply transform with a specified anchor point
New Types
Line
 [X] Slope
 [X] Yintercept
 [X] Xintercept
 [X] Horizontal? / vertical? / parallel(to: ...)?
 [X] Get a perpendicular line
 [X] Determine intersection with other
Line
orLineSegment
LineSegment
 [X] Length
 [X] Derive a
Line
 [X] Rotate
 [X] Determine intersection with other
Line
orLineSegment
 [X]
CGPath
Circle
 [X] Radius
 [X] Diameter
 [X] Circumference
 [X] Area
 [X] Center
 [X] Width / Height
 [X] Bounding rect
 [X] Contains point?
 [X]
CGPath
 [X] Points along the perimeter (divide the circle into steps, rotating in a specific direction...)
Triangle
 [X] Vertices (as
CGPoint
)  [X] Sides (as
LineSegment
)  [X] Angles (as
Angle
, see further on)  [X] Angle bisectors (as
LineSegment
)  [X] Altitudes (as
LineSegment
)  [X] Equilateral? / isosceles? / scalene? / right? / oblique? / acute? / obtuse?
 [X] Centroid
 [X] Circumcenter
 [X] Incenter
 [X] Orthocenter
 [X] Area
 [X] Bounding rect
 [X] Contains point?
 [X]
CGPath
Square
 [X] Edge length
 [X] Area
 [X] Perimeter
 [X] Center
 [X]
CGPath
 [X]
CGRect
Polygon
 [X] Init with points or with line segments
 [X] Edge count
 [X] Selfintersecting?
 [X] Convex? / concave?
 [X] Area
 [X] Perimeter
 [X] Center
 [X] Bounding rect
 [X] Contains point?
 [X]
CGPath
Corner
 [X] Adjacent edges (
CGRectEdges
)  [X] Opposite corner
Angle
 [X] Init with radians or degrees
 [X] Convert unit
 [X] Normalize
 [X] Invert
 [X] Compare
 [X] Addition, subtraction, multiplication...
 [X] Basic trigonometric functions also accept
Angle
 [X] Create rotation
CGAffineTransform
withAngle
Installation
CocoaPods
Metron is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod "Metron"
Carthage
Metron is also available through Carthage. To install it, simply add the following line to your Cartfile:
github "toineheuvelmans/Metron"
Swift Package Manager
Metron can also be used with the Swift Package Manager. Add Metron to the dependencies
value of your Package.swift
:
dependencies: [
.Package(url: "https://github.com/toineheuvelmans/metron.git", majorVersion: 1)
]
Suggestions or feedback?
Feel free to create a pull request, open an issue or find me on Twitter.
License
Metron is available under the MIT license. See the [LICENSE](LICENSE) file for more info.
*Note that all licence references and agreements mentioned in the Metron README section above
are relevant to that project's source code only.