65 lines
2.0 KiB
C#
65 lines
2.0 KiB
C#
using System;
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namespace HandyControl.Expression.Drawing
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{
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internal static class MathHelper
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{
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public static bool AreClose(double value1, double value2) =>
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// ReSharper disable once CompareOfFloatsByEqualityOperator
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value1 == value2 || IsVerySmall(value1 - value2);
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public static double Lerp(double x, double y, double alpha) => x * (1.0 - alpha) + y * alpha;
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public static bool IsVerySmall(double value) => Math.Abs(value) < 1E-06;
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public static bool IsFiniteDouble(double x) => !double.IsInfinity(x) && !double.IsNaN(x);
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public static double DoubleFromMantissaAndExponent(double x, int exp) => x * Math.Pow(2.0, exp);
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public static bool GreaterThan(double value1, double value2) => value1 > value2 && !AreClose(value1, value2);
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public static bool GreaterThanOrClose(double value1, double value2)
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{
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if (value1 <= value2)
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{
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return AreClose(value1, value2);
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}
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return true;
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}
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public static double Hypotenuse(double x, double y) => Math.Sqrt(x * x + y * y);
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public static bool LessThan(double value1, double value2) => value1 < value2 && !AreClose(value1, value2);
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public static bool LessThanOrClose(double value1, double value2)
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{
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if (value1 >= value2)
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{
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return AreClose(value1, value2);
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}
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return true;
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}
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public static double EnsureRange(double value, double? min, double? max)
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{
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if (min.HasValue && value < min.Value)
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{
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return min.Value;
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}
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if (max.HasValue && value > max.Value)
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{
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return max.Value;
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}
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return value;
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}
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public static double SafeDivide(double lhs, double rhs, double fallback)
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{
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if (!IsVerySmall(rhs))
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{
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return lhs / rhs;
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}
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return fallback;
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}
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}
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} |