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mateusz.vi |
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/*
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* Routines for computation of basic transcendental functions sin and cos.
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* These routines use only integers, hence they do not require an FPU nor any
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* kind of FPU emulation. Works reasonably fast even on an 8086 CPU.
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*
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* The results are computed using polynomial approximations. Their precision
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* is not expected to be ideal, but "good enough" for common usage.
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*
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* This file is part of the Mateusz' DOS Routines (MDR): http://mdr.osdn.io
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* Published under the terms of the MIT License, as stated below.
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*
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* Copyright (C) 2022 Mateusz Viste
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef MDR_TRIGINT_H
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#define MDR_TRIGINT_H
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/* Computes the cosine value for the given radian.
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* The radian argument must be provided multiplied by 1000.
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* Returns the cosine value multiplied by 1000. */
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short trigint_cos(short rad1000);
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/* Computes the sine value for the given radian angle.
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* The radian argument must be provided multiplied by 1000.
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* Returns the cosine value multiplied by 1000. */
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short trigint_sin(short rad1000);
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#endif
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