84 lines
2.8 KiB
C++
84 lines
2.8 KiB
C++
///\file
|
|
|
|
/******************************************************************************
|
|
The MIT License(MIT)
|
|
|
|
Embedded Template Library.
|
|
https://github.com/ETLCPP/etl
|
|
https://www.etlcpp.com
|
|
|
|
Copyright(c) 2021 John Wellbelove
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files(the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions :
|
|
|
|
The above copyright notice and this permission notice shall be included in all
|
|
copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
SOFTWARE.
|
|
******************************************************************************/
|
|
|
|
#ifndef ETL_RESCALE_INCLUDED
|
|
#define ETL_RESCALE_INCLUDED
|
|
|
|
#include "platform.h"
|
|
#include "functional.h"
|
|
#include "type_traits.h"
|
|
#include "algorithm.h"
|
|
|
|
//#include <math.h>
|
|
#include <stdint.h>
|
|
|
|
namespace etl
|
|
{
|
|
//***************************************************************************
|
|
/// Rescale function.
|
|
//***************************************************************************
|
|
template<typename TInput, typename TOutput>
|
|
class rescale : public etl::unary_function<TOutput, TInput>
|
|
{
|
|
public:
|
|
|
|
//*****************************************************************
|
|
/// Constructor.
|
|
//*****************************************************************
|
|
rescale(TInput input_min_value_,
|
|
TInput input_max_value_,
|
|
TOutput output_min_value_,
|
|
TOutput output_max_value_)
|
|
: input_min_value(input_min_value_)
|
|
, output_min_value(output_min_value_)
|
|
, output_max_value(output_max_value_)
|
|
, multiplier(double(output_max_value_ - output_min_value_) / double(input_max_value_ - input_min_value_))
|
|
{
|
|
}
|
|
|
|
//*****************************************************************
|
|
/// operator ()
|
|
//*****************************************************************
|
|
TOutput operator ()(TInput value) const
|
|
{
|
|
return TOutput(((value - input_min_value) * multiplier)) + output_min_value;;
|
|
}
|
|
|
|
private:
|
|
|
|
const TInput input_min_value;
|
|
const TOutput output_min_value;
|
|
const TOutput output_max_value;
|
|
double multiplier;
|
|
};
|
|
}
|
|
|
|
#endif
|