template.h

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#pragma once
#include <limits>
#include <type_traits>
 
namespace MySpace
{
 
template<class T, class S>
auto calculateOffset(T value, T min_val, T max_val, S len, bool clip) -> S
{
  max_val -= min_val;
  value -= min_val;
  S temp;
  if constexpr (std::is_floating_point<T>())
  {
    temp = len * (value / max_val);
  }
  else
  {
    temp = (len * value) / max_val;
  }
  temp = (max_val && value) ? temp : 0;
  // Clip when required.
  if (clip)
  {
    // When the len is a negative value.
    if (len < 0)
    {
      return (temp < len)
        ? len
        : (temp > S(0))
        ? S(0)
        : temp;
    }
    return (temp > len)
      ? len
      : (temp < S(0))
      ? S(0)
      : temp;
  }
  return temp;
}
 
template<class T>
inline auto clip(const T value, const T min_val, const T max_val) -> T
{
  return (value < min_val)
    ? min_val
    : (
        (value > max_val)
          ? max_val
          : value
      );
}
 
}// namespace MySpace