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