33 lines
981 B
C++
33 lines
981 B
C++
/*
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* Utils.cpp
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*
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* Created on: 28 Apr 2021
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* Author: Ralim
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*/
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#include <Utils.h>
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int32_t Utils::InterpolateLookupTable(const uint16_t *lookupTable,
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const int noItems, const uint16_t value) {
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if (value) {
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for (int i = 1; i < (noItems - 1); i++) {
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// If current tip temp is less than current lookup, then this current lookup is the higher point to interpolate
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if (value < lookupTable[i * 2]) {
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return LinearInterpolate(lookupTable[(i - 1) * 2],
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lookupTable[((i - 1) * 2) + 1], lookupTable[i * 2],
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lookupTable[(i * 2) + 1], value);
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}
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}
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return LinearInterpolate(lookupTable[(noItems - 2) * 2],
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lookupTable[((noItems - 2) * 2) + 1],
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lookupTable[(noItems - 1) * 2],
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lookupTable[((noItems - 1) * 2) + 1], value);
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}
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return 0;
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}
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int32_t Utils::LinearInterpolate(int32_t x1, int32_t y1, int32_t x2, int32_t y2,
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int32_t x) {
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return y1 + (((((x - x1) * 1000) / (x2 - x1)) * (y2 - y1))) / 1000;
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}
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