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120 lines
2.3 KiB
C++
120 lines
2.3 KiB
C++
//
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// FILE: FastMap.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.4.0
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// PURPOSE: class with fast map function - library for Arduino
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// URL: https://github.com/RobTillaart/FastMap
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//
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// HISTORY: see changelog.md
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#include "FastMap.h"
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///////////////////////////////////////////////////////////////
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//
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// FASTMAP
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//
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FastMap::FastMap()
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{
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init(0, 1, 0, 1);
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}
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bool FastMap::init(float in_min, float in_max, float out_min, float out_max)
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{
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float _inRange = in_max - in_min;
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float _outRange = out_max - out_min;
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if ((_inRange == 0.0 ) || (_outRange == 0.0)) return false;
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_in_min = in_min;
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_in_max = in_max;
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_out_min = out_min;
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_out_max = out_max;
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_factor = _outRange/_inRange;
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_base = _out_min - _in_min * _factor;
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_backfactor = _inRange/_outRange;
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_backbase = _in_min - _out_min * _backfactor;
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return true;
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}
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float FastMap::constrainedMap(float value)
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{
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if (value <= _in_min) return _out_min;
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if (value >= _in_max) return _out_max;
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return this->map(value);
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}
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float FastMap::lowerConstrainedMap(float value)
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{
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if (value <= _in_min) return _out_min;
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return this->map(value);
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}
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float FastMap::upperConstrainedMap(float value)
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{
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if (value >= _in_max) return _out_max;
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return this->map(value);
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}
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///////////////////////////////////////////////////////////////
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//
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// FASTMAP_DOUBLE
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//
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FastMapDouble::FastMapDouble()
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{
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init(0, 1, 0, 1);
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}
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bool FastMapDouble::init(double in_min, double in_max, double out_min, double out_max)
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{
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double _inRange = in_max - in_min;
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double _outRange = out_max - out_min;
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if ((_inRange == 0.0 ) || (_outRange == 0.0)) return false;
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_in_min = in_min;
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_in_max = in_max;
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_out_min = out_min;
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_out_max = out_max;
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_factor = _outRange/_inRange;
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_base = _out_min - _in_min * _factor;
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_backfactor = _inRange/_outRange;
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_backbase = _in_min - _out_min * _backfactor;
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return true;
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}
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double FastMapDouble::constrainedMap(double value)
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{
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if (value <= _in_min) return _out_min;
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if (value >= _in_max) return _out_max;
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return this->map(value);
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}
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double FastMapDouble::lowerConstrainedMap(double value)
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{
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if (value <= _in_min) return _out_min;
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return this->map(value);
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}
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double FastMapDouble::upperConstrainedMap(double value)
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{
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if (value >= _in_max) return _out_max;
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return this->map(value);
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}
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// -- END OF FILE --
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