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rescale.h
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/******************************************************************************
The MIT License(MIT)
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
Copyright(c) 2021 John Wellbelove
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of this software and associated documentation files(the "Software"), to deal
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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******************************************************************************/
#ifndef ETL_RESCALE_INCLUDED
#define ETL_RESCALE_INCLUDED
#include "platform.h"
#include "algorithm.h"
#include "functional.h"
#include "type_traits.h"
// #include <math.h>
namespace etl
{
//***************************************************************************
//***************************************************************************
template <typename TInput, typename TOutput>
class rescale : public etl::unary_function<TOutput, TInput>
{
public:
//*****************************************************************
//*****************************************************************
ETL_CONSTEXPR 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_))
{
}
//*****************************************************************
//*****************************************************************
ETL_CONSTEXPR 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;
};
} // namespace etl
#endif
algorithm.h
etl::rescale::operator()
ETL_CONSTEXPR TOutput operator()(TInput value) const
operator ()
Definition rescale.h:65
etl::rescale::rescale
ETL_CONSTEXPR rescale(TInput input_min_value_, TInput input_max_value_, TOutput output_min_value_, TOutput output_max_value_)
Constructor.
Definition rescale.h:54
functional.h
etl
Definition absolute.h:40
platform.h
etl::unary_function
unary_function
Definition functional.h:182
type_traits.h