robtillaart/angle

Arduino library for basic math for Angles in degrees, minute, seconds

Angle

Arduino library for basic math for Angles in degrees, minute, seconds and ten-thousands.

Description

Angle is an Arduino class to print, compare and do basic maths with angles in degrees, minutes seconds and ten-thousands. The class was created to be able to print an angle with minutes and seconds instead of as a floating point or radians.

To make the library more useful basic maths ( + - * / ) and comparisons ( == != < <= > >= ) are added to the class.

The library implements the Printable interface, allowing one to call

Serial.println(angle) or SD.print(angle).

Degree sign ° = ALT-0176 (Windows)

Related

• https://github.com/RobTillaart/AngleConvertor
• https://github.com/RobTillaart/AverageAngle
• https://github.com/RobTillaart/Angle
• https://github.com/RobTillaart/runningAngle

Interface

#include "Angle.h"

Constructors

• Angle(int dd = 0, int mm = 0, int ss = 0, int tt = 0) create an Angle, default is zero.
• Angle(double alpha) create an Angle from a double.
• Angle(char * str) create an Angle from a string e.g. "45.31234".

Base

• int sign() returns -1 or 1.
• int degree() returns # degrees.
• int minute() returns # minutes.
• int second() returns # seconds.
• int tenthousand() returns # ten-thousands of a second.

Conversions

• double toDouble() returns the angle as a double (0..360.0, float on UNO).
• double toRadians() returns the angle in radians (0..TWO_PI).
• void fromRadian(double rad) create an angle from radians.

More conversions - https://github.com/RobTillaart/AngleConvertor

Equality operators

The library supports equality operator "==", "!=", "<" "<=" ">" and ">=" .

Math operators

• negate returns -angle.
• addition and subtract add angles to angles.
• multiplication and division multiply an angle with a double.
• ratio ratio = Angle/Angle.

Operation

See examples.

Note

The library has not been tested extensively and it could still contain bugs. Especially the constructor does not check input so use it carefully.

Future

Must

• improve documentation

Should

• Test normalize code
  • unit tests, sketch?
• test more
  • TOCHECK in code
• improve code quality

Could

• optimize code where possible
  • low priority
• move all code to .cpp
• change output format to confirm standard 4°12'14.1234"

Wont

Support

If you appreciate my libraries, you can support the development and maintenance. Improve the quality of the libraries by providing issues and Pull Requests, or donate through PayPal or GitHub sponsors.

Thank you,

angle's Issues

improve math unit tests

now the unit tests are minimal, especially the math section.
Needs to improve

update readme.md

interface section needs to be elaborated