58 lines
2.2 KiB
C#
58 lines
2.2 KiB
C#
//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="Cos"
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// Project: StgSharp
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// AuthorGroup: Nitload
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// Copyright (c) Nitload. All rights reserved.
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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 deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// 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 all
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// 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 FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// -----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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using System;
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using System.Runtime.CompilerServices;
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namespace StgSharp.Mathematics
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{
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public static partial class Scalar
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static float Cos(float x)
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{
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/*
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float refer = x / 360.0f;
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refer -= (int)refer;
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refer *= 40;
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int a = (int)refer; //大分度，查表
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refer -= a; //小分度，拟合
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float refer2 = refer * refer;
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return ((-sinData[a]) * ((0.1570796327f * refer) - (6.459640975e-4f * refer * refer2)))
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+ (cosData[a] * ((1 - (0.0123370055f * refer2)) + (2.536695709e-5f * refer2 * refer2)));
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*/
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return MathF.Cos(x);
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}
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}
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}
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