INANGLES Clock Angler

This React Native application allows you to view the angles between the hour and minute hands on a clock. It was built using test-driven development, and it serves minimal utility other than acting as a base for forensic analysis.

Install

$ git clone https://github.com/agm1984/rn-clock-angle.git
$ cd rn-clock-angle
$ npm install
$ npm run android

Test

This repo uses Jest verbose: true mode. See the package.json file to disable it.

Standard

$ npm test

Coverage Test

Latest: 90.63% coverage

$ npm test -- --coverage

Formulas

Rotate from pivot point

rad = angle * Math.PI / 180
transformX(Math.cos(angle) * dx - Math.sin(angle) * dy)
transformY(Math.sin(angle) * dx + Math.cos(angle) * dy)
rotate(angle+"deg")

Clock Angle Formula

((m * 6) - ((h * 30) + (m * 0.5)))

Clock Angle Coterminal Formula

(360 - ((m * 6) - ((h * 30) + (m * 0.5))))

Research Links

1. Analog Clock https://enlight.nyc/clock
2. Clock Angle https://sites.google.com/site/mymathclassroom/geometry/how-to-solve-clock-angle-problems-geometrically
3. Clock Angle https://www.glassdoor.com.au/Interview/what-is-angle-between-hour-hand-and-minute-hand-in-clock-at-4-20-what-is-biggest-conflict-management-you-have-handled-in-QTN_497599.htm

Contact

Email

[email protected]

GitHub

Submit any questions as issues on GitHub: https://github.com/agm1984/rn-clock-angle/issues