hondacrx
265 lines
7.9 KiB
C#
265 lines
7.9 KiB
C#
/*
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* Copyright (C) 2012-2017 CypherCore <http://github.com/CypherCore>
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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. See the
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* 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://www.gnu.org/licenses/>.
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*/
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using Framework.Constants;
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using System;
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public static class MathFunctions
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{
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public const float E = 2.71828f;
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public const float Log10E = 0.434294f;
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public const float Log2E = 1.4427f;
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public const float PI = 3.14159f;
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public const float PiOver2 = 1.5708f;
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public const float PiOver4 = 0.785398f;
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public const float TwoPi = 6.28319f;
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public const float Epsilon = 4.76837158203125E-7f;
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public static float wrap(float t, float lo, float hi)
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{
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if ((t >= lo) && (t < hi))
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{
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return t;
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}
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float interval = hi - lo;
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return (float)(t - interval * Math.Floor((t - lo) / interval));
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}
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public static void Swap<T>(ref T lhs, ref T rhs)
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{
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T temp = lhs;
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lhs = rhs;
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rhs = temp;
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}
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#region Clamp
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/// <summary>
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/// Clamp a <paramref name="value"/> to <paramref name="calmpedValue"/> if it is withon the <paramref name="tolerance"/> range.
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/// </summary>
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/// <param name="value">The value to clamp.</param>
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/// <param name="calmpedValue">The clamped value.</param>
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/// <param name="tolerance">The tolerance value.</param>
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/// <returns>
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/// Returns the clamped value.
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/// result = (tolerance > Abs(value-calmpedValue)) ? calmpedValue : value;
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/// </returns>
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public static float Clamp(float value, float calmpedValue, float tolerance)
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{
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return (tolerance > Math.Abs(value - calmpedValue)) ? calmpedValue : value;
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}
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/// <summary>
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/// Clamp a <paramref name="value"/> to <paramref name="calmpedValue"/> using the default tolerance value.
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/// </summary>
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/// <param name="value">The value to clamp.</param>
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/// <param name="calmpedValue">The clamped value.</param>
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/// <returns>
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/// Returns the clamped value.
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/// result = (EpsilonF > Abs(value-calmpedValue)) ? calmpedValue : value;
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/// </returns>
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/// <remarks><see cref="MathFunctions.EpsilonF"/> is used for tolerance.</remarks>
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public static float Clamp(float value, float calmpedValue)
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{
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return (Epsilon > Math.Abs(value - calmpedValue)) ? calmpedValue : value;
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}
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#endregion
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static double eps(double a, double b)
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{
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double aa = Math.Abs(a) + 1.0;
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if (aa == double.PositiveInfinity)
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return double.Epsilon;
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else
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return double.Epsilon * aa;
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}
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public static float lerp(float a, float b, float f)
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{
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return a + (b - a) * f;
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}
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public static float DegToRad(float degrees)
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{
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return degrees * (2.0f * PI / 360.0f);
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}
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#region Fuzzy
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public static bool fuzzyEq(double a, double b)
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{
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return (a == b) || (Math.Abs(a - b) <= eps(a, b));
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}
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public static bool fuzzyGt(double a, double b)
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{
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return a > b + eps(a, b);
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}
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public static bool fuzzyLt(double a, double b)
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{
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return a < b - eps(a, b);
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}
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public static bool fuzzyNe(double a, double b)
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{
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return !fuzzyEq(a, b);
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}
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public static bool fuzzyLe(double a, double b)
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{
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return a < b + eps(a, b);
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}
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public static bool fuzzyGe(double a, double b)
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{
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return a > b - eps(a, b);
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}
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#endregion
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public static int ApplyPct(ref int Base, float pct)
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{
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return Base = CalculatePct(Base, pct);
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}
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public static uint ApplyPct(ref uint Base, float pct)
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{
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return Base = CalculatePct(Base, pct);
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}
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public static float ApplyPct(ref float Base, float pct)
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{
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return Base = CalculatePct(Base, pct);
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}
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public static long AddPct(ref long value, float pct)
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{
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return value += (long)CalculatePct(value, pct);
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}
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public static int AddPct(ref int value, float pct)
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{
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return value += CalculatePct(value, pct);
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}
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public static uint AddPct(ref uint value, float pct)
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{
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return value += CalculatePct(value, pct);
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}
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public static float AddPct(ref float value, float pct)
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{
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return value += CalculatePct(value, pct);
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}
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public static int CalculatePct(int value, float pct)
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{
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return (int)(value * Convert.ToSingle(pct) / 100.0f);
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}
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public static uint CalculatePct(uint value, float pct)
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{
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return (uint)(value * Convert.ToSingle(pct) / 100.0f);
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}
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public static float CalculatePct(float value, float pct)
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{
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return value * pct / 100.0f;
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}
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public static ulong CalculatePct(ulong value, float pct)
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{
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return (ulong)(value * pct / 100.0f);
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}
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public static int RoundToInterval(ref int num, dynamic floor, dynamic ceil)
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{
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return num = (int)Math.Min(Math.Max(num, floor), ceil);
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}
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public static uint RoundToInterval(ref uint num, dynamic floor, dynamic ceil)
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{
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return num = Math.Min(Math.Max(num, floor), ceil);
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}
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public static float RoundToInterval(ref float num, dynamic floor, dynamic ceil)
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{
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return num = Math.Min(Math.Max(num, floor), ceil);
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}
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public static void ApplyPercentModFloatVar(ref float value, float val, bool apply)
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{
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if (val == -100.0f) // prevent set var to zero
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val = -99.99f;
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value *= (apply ? (100.0f + val) / 100.0f : 100.0f / (100.0f + val));
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}
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public static bool CompareValues(ComparisionType type, uint val1, uint val2)
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{
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switch (type)
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{
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case ComparisionType.EQ:
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return val1 == val2;
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case ComparisionType.High:
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return val1 > val2;
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case ComparisionType.Low:
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return val1 < val2;
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case ComparisionType.HighEQ:
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return val1 >= val2;
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case ComparisionType.LowEQ:
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return val1 <= val2;
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default:
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// incorrect parameter
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//Contract.Assert(false);
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return false;
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}
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}
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public static bool CompareValues(ComparisionType type, float val1, float val2)
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{
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switch (type)
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{
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case ComparisionType.EQ:
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return val1 == val2;
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case ComparisionType.High:
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return val1 > val2;
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case ComparisionType.Low:
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return val1 < val2;
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case ComparisionType.HighEQ:
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return val1 >= val2;
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case ComparisionType.LowEQ:
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return val1 <= val2;
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default:
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// incorrect parameter
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//Contract.Assert(false);
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return false;
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}
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}
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public static ulong MakePair64(uint l, uint h)
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{
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return (ulong)l | ((ulong)h << 32);
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}
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public static uint Pair64_HiPart(ulong x)
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{
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return (uint)((x >> 32) & 0x00000000FFFFFFFF);
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}
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public static uint Pair64_LoPart(ulong x)
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{
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return (uint)(x & 0x00000000FFFFFFFF);
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}
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public static ushort Pair32_HiPart(uint x)
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{
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return (ushort)((x >> 16) & 0x0000FFFF);
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}
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public static ushort Pair32_LoPart(uint x)
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{
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return (ushort)(x & 0x0000FFFF);
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}
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public static uint MakePair32(uint l, uint h)
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{
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return (ushort)l | (h << 16);
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}
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public static ushort MakePair16(uint l, uint h)
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{
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return (ushort)((byte)l | (ushort)h << 8);
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}
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}
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