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/*
* This file is part of the Colobot: Gold Edition source code
* Copyright (C) 2001-2023, Daniel Roux, EPSITEC SA & TerranovaTeam
* http://epsitec.ch; http://colobot.info; http://github.com/colobot
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://gnu.org/licenses
*/
/**
* \file math/half.h
* \brief Implementation of half-precision floating point values.
*/
#pragma once
#include <cstdint>
// Math module namespace
namespace Math
{
//! Converts float to half-float binary representation
uint16_t FloatToHalf(float value);
//! Converts half-float binary representation to float
float HaltToFloat(uint16_t value);
//@colobot-lint-exclude ClassNamingRule
/**
* \struct half
* \brief half-precision floating point type
*
* Represents a half-precision floating point value.
* Contains the required methods for converting to and from ints and floats.
*
* This type is for storage only.
* Conversion is expensive and should be avoided if possible.
*/
struct half
{
//! 16-bit binary representation of half-float
uint16_t bits;
//! Default constructor
half()
: bits(0)
{
}
//! Copy constructor
half(const half& other)
: bits(other.bits)
{
}
//! Copy operator
half& operator=(const half& other)
{
bits = other.bits;
return *this;
}
//! Conversion constructor from int
explicit half(int value)
: bits(FloatToHalf(static_cast<float>(value)))
{
}
//! Conversion constructor from float
explicit half(float value)
: bits(FloatToHalf(value))
{
}
//! Conversion operator to int
explicit operator int() const
{
return static_cast<int>(HaltToFloat(bits));
}
//! Conversion operator to float
explicit operator float() const
{
return HaltToFloat(bits);
}
};
//@end-colobot-lint-exclude
} // namespace Math
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