ros2_control - humble
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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
13// copyright notice, this list of conditions and the following
14// disclaimer in the documentation and/or other materials provided
15// with the distribution.
16// * Neither the name of the Willow Garage nor the names of its
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
21// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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24// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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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{
43static inline double exponentialSmoothing(
44 double current_raw_value, double last_smoothed_value, double alpha)
45{
46 return alpha * current_raw_value + (1 - alpha) * last_smoothed_value;
47}
48} // namespace filters
49
50#endif // CONTROL_TOOLBOX__FILTERS_HPP_"