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71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
#pragma once
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//
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// FILE: DistanceTable.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.3.1
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// PURPOSE: Arduino library to store a symmetrical distance table in less memory
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// URL: https://github.com/RobTillaart/DistanceTable
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//
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#include "Arduino.h"
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#define DISTANCETABLE_LIB_VERSION (F("0.3.1"))
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class DistanceTable
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{
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public:
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explicit DistanceTable(uint8_t dimension, float value = 0);
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~DistanceTable();
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void clear() { setAll(0); };
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void setAll(float value);
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bool set(uint8_t x, uint8_t y, float value );
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float get(uint8_t x, uint8_t y);
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// the invert flag tells that get(x, y) == -get(y, x);
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void setInvert(bool invert = false) { _invert = invert; };
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bool getInvert() { return _invert; };
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// minimum and maximum skip x == y pairs as these are 0.
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float minimum(uint8_t &x, uint8_t &y);
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float maximum(uint8_t &x, uint8_t &y);
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float sum();
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float average();
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// epsilon allows 'almost equal' searches
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// if (invert == false) count counts both (x,y) and (y,x) => always even nr.
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// if (invert == true) count counts (x,y) and (y,x) separately.
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// count skips x == y pairs so counting zero's is missing the diagonal.
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uint16_t count(float value, float epsilon = 0.0);
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uint16_t countAbove(float value);
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uint16_t countBelow(float value);
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// debug
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// default dumps to Serial but other stream are possible
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void dump(Print * stream = &Serial);
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uint8_t dimension() { return _dimension; };
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uint16_t elements() { return _elements; };
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uint16_t memoryUsed() { return _elements * sizeof(float); };
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// Obsolete in future
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uint16_t size() { return memoryUsed(); };
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protected:
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uint8_t _dimension;
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uint16_t _elements;
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float * _distanceTable;
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bool _invert;
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};
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// --- END OF FILE ---
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