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85 lines
2.3 KiB
C++
85 lines
2.3 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of Beast: https://github.com/vinniefalco/Beast
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Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef BEAST_MATH_H_INCLUDED
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#define BEAST_MATH_H_INCLUDED
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//
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// Miscellaneous mathematical calculations
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//
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// Calculate the bin for a value given the bin size.
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// This correctly handles negative numbers. For example
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// if value == -1 then calc_bin returns -1.
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template <typename Ty>
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inline Ty calc_bin (Ty value, int size)
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{
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if (value >= 0)
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return value / size;
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else
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return (value - size + 1) / size;
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}
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// Given a number and a bin size, this returns the first
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// corresponding value of the bin associated with the given number.
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// It correctly handles negative numbers. For example,
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// if value == -1 then calc_bin always returns -size
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template <typename Ty>
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inline Ty calc_bin_start (Ty value, int size)
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{
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return calc_bin (value, size) * size;
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}
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template <class T>
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inline T pi () noexcept
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{
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return 3.14159265358979;
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}
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template <class T>
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inline T twoPi () noexcept
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{
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return 6.28318530717958;
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}
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template <class T>
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inline T oneOverTwoPi () noexcept
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{
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return 0.1591549430918955;
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}
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template <class T, class U>
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inline T degreesToRadians (U degrees)
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{
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return T (degrees * 0.0174532925199433);
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}
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template <class T, class U>
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inline T radiansToDegrees (U radians)
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{
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T deg = T (radians * U (57.29577951308238));
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if (deg < 0)
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deg += 360;
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return deg;
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}
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#endif
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