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9fd35ba361
Begin with zero instead of the initializing value, as the latter doesn't make much sense in practice, but complicates the code much.
28 lines
636 B
C++
28 lines
636 B
C++
// Copyright (c) 2023 Oleg Kalachev <okalachev@gmail.com>
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// Repository: https://github.com/okalachev/flix
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// Low pass filter implementation
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#pragma once
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template <typename T> // Using template to make the filter usable for scalar and vector values
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class LowPassFilter {
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public:
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float alpha; // smoothing constant, 1 means filter disabled
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T output;
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LowPassFilter(float alpha): alpha(alpha) {};
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T update(const T input) {
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return output += alpha * (input - output);
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}
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void setCutOffFrequency(float cutOffFreq, float dt) {
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alpha = 1 - exp(-2 * PI * cutOffFreq * dt);
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}
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void reset() {
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output = T(); // set to zero
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}
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};
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