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86 lines
1.8 KiB
C++
86 lines
1.8 KiB
C++
//
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// FILE: AverageAngle.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.7
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// PURPOSE: class for averaging angles
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// URL: https://github.com/RobTillaart/AverageAngle
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//
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// HISTORY:
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// 0.1.0 2017-11-21 initial version
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// 0.1.1 2017-12-09 fixed negative values of average
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// 0.1.2 2018-03-30 added getAverageLength, getTotalLength + zero-test
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// 0.1.3 2020-03-26 #pragma once; removed pre 1.00 support; readme.md
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// 0.1.4 2020-05-27 update library.json
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// 0.1.5 2020-12-12 added Arduino-CI, unit tests, minor refactor.
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// 0.1.6 2021-10-18 update Arduino-CI, add GRADIANS
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// 0.1.7 2021-12-13 update library.json, fix badges, license, readme
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#include "AverageAngle.h"
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AverageAngle::AverageAngle(const enum AngleType type)
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{
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_type = type;
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reset();
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}
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uint32_t AverageAngle::add(float alpha, float length)
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{
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if (_type == AverageAngle::DEGREES )
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{
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alpha *= DEG_TO_RAD; // (PI / 180.0);
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}
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else if (_type == AverageAngle::GRADIANS )
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{
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alpha *= GRAD_TO_RAD; // (PI / 200.0);
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}
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_sumx += (cos(alpha) * length);
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_sumy += (sin(alpha) * length);
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_count++;
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return _count;
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}
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void AverageAngle::reset()
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{
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_sumx = 0;
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_sumy = 0;
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_count = 0;
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}
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float AverageAngle::getAverage()
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{
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float angle = atan2(_sumy, _sumx);
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if (angle < 0) angle += TWO_PI; // (PI * 2);
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if (_type == AverageAngle::DEGREES )
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{
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angle *= RAD_TO_DEG; // (180.0 / PI);
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}
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else if (_type == AverageAngle::GRADIANS )
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{
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angle *= RAD_TO_GRAD; // (200.0 / PI);
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}
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return angle;
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}
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float AverageAngle::getTotalLength()
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{
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if (_count == 0) return 0;
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return hypot(_sumy, _sumx);
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}
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float AverageAngle::getAverageLength()
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{
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if (_count == 0) return 0;
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return hypot(_sumy, _sumx) / _count;
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}
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// -- END OF FILE --
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