computablerectangle's Introduction

ComputableRectangle

ComputableRectangle is a library thah enables four arithmetic operations on CGRect, CGPoint, CGSize.

Install

Carthage can be used to install.

Add the following line to Cartfile:

github "galapagos/ComputableRectangle"

Usage

Calculating scalar value

It is possible to calculate scalar values CGRect, CGPoint, CGSize.

As a result, the calculation result is applied to all properties.

※ A scalar value refers to a value that can be initialized with CGFloat and CGFloat value.

import ComputableRectangle

(CGRect(x: 1, y: 1, width: 1, height: 1) + 1) == CGRect(x: 2, y: 2, width: 2, height: 2)
(CGPoint(x: 1, y: 1) - 1) == CGPoint.zero
(CGSize(with: 1, height: 1) * 2) == CGSize(with: 2, height: 2)

Caluculating CGPoint value

It is possible to calculate CGPoint values CGRect, CGPoint.

As a result, the calculation result is applied to x and y properties.

import ComputableRectangle

(CGRect(x: 1, y: 1, width: 1, height: 1) + CGPoint(x: 1, y: 2)) == CGRect(x: 2, y: 2, width: 1, height: 1)
(CGPoint(x: 1, y: 1) - CGPoint(x: 1, y: 2)) == CGPoint(x: 0, y: -1)

Calculating CGSize value

It is possible to calculate CGSize values CGRect, CGSize.

As a result, the calculation result is applied to width and height properties.

import ComputableRectangle

(CGRect(x: 1, y: 1, width: 1, height: 1) + CGSize(width: 1, height: 2)) == CGRect(x: 1, y: 1, width: 2, height: 3)
(CGSize(with: 1, height: 1) * CGSize(width: 2, height: 3)) == CGSize(with: 2, height: 3)

Calculating on property

You can perform operations on specific properties.

The value for computation must be initialized with a dedicated type.

import ComputableRectangle

CGRect(x: 1, y: 1, widht: 1, height: 1)
    + OrignX(1)
    - OriginY(2)
    * SizeOfWidht(3)
    / SizeOfHeight(4) // CGRect(x: 2, y: 0, widht: 3, height: 0.25)

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