ros2_control - rolling
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filters.hpp
1// Copyright (c) 2008, Willow Garage, Inc.
2// All rights reserved.
3//
4// Software License Agreement (BSD License 2.0)
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions
8// are met:
9//
10// * Redistributions of source code must retain the above copyright
11// notice, this list of conditions and the following disclaimer.
12// * Redistributions in binary form must reproduce the above
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15// with the distribution.
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17// contributors may be used to endorse or promote products derived
18// from this software without specific prior written permission.
19//
20// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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31// POSSIBILITY OF SUCH DAMAGE.
32
33#ifndef CONTROL_TOOLBOX__FILTERS_HPP_
34#define CONTROL_TOOLBOX__FILTERS_HPP_
35
36#include <algorithm>
37
38namespace filters
39{
43template <typename T>
44static inline T exponentialSmoothing(
45 const T & current_raw_value, const T & last_smoothed_value, double alpha)
46{
47 return alpha * current_raw_value + (1 - alpha) * last_smoothed_value;
48}
49} // namespace filters
50
51#endif // CONTROL_TOOLBOX__FILTERS_HPP_