mirror of https://github.com/SixLabors/ImageSharp
James Jackson-South
9 years ago
29 changed files with 320 additions and 177 deletions
@ -0,0 +1,144 @@ |
|||
// <copyright file="MathF.cs" company="James Jackson-South">
|
|||
// Copyright (c) James Jackson-South and contributors.
|
|||
// Licensed under the Apache License, Version 2.0.
|
|||
// </copyright>
|
|||
|
|||
namespace ImageSharp |
|||
{ |
|||
using System; |
|||
using System.Runtime.CompilerServices; |
|||
|
|||
/// <summary>
|
|||
/// Provides single-precision floating point constants and static methods for trigonometric, logarithmic, and other common mathematical functions.
|
|||
/// </summary>
|
|||
// ReSharper disable InconsistentNaming
|
|||
internal static class MathF |
|||
{ |
|||
/// <summary>
|
|||
/// Represents the ratio of the circumference of a circle to its diameter, specified by the constant, π.
|
|||
/// </summary>
|
|||
public const float PI = (float)Math.PI; |
|||
|
|||
/// <summary>Returns the absolute value of a single-precision floating-point number.</summary>
|
|||
/// <param name="f">A number that is greater than or equal to <see cref="F:System.Single.MinValue" />, but less than or equal to <see cref="F:System.Single.MaxValue" />.</param>
|
|||
/// <returns>A single-precision floating-point number, x, such that 0 ≤ x ≤<see cref="F:System.Single.MaxValue" />.</returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public static float Abs(float f) |
|||
{ |
|||
return Math.Abs(f); |
|||
} |
|||
|
|||
/// <summary>Returns the smallest integral value that is greater than or equal to the specified single-precision floating-point number.</summary>
|
|||
/// <param name="f">A single-precision floating-point number. </param>
|
|||
/// <returns>The smallest integral value that is greater than or equal to <paramref name="f" />.
|
|||
/// If <paramref name="f" /> is equal to <see cref="F:System.Single.NaN" />, <see cref="F:System.Single.NegativeInfinity" />,
|
|||
/// or <see cref="F:System.Single.PositiveInfinity" />, that value is returned.
|
|||
/// Note that this method returns a <see cref="T:System.Single" /> instead of an integral type.</returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public static float Ceiling(float f) |
|||
{ |
|||
return (float)Math.Ceiling(f); |
|||
} |
|||
|
|||
/// <summary>Returns e raised to the specified power.</summary>
|
|||
/// <param name="f">A number specifying a power.</param>
|
|||
/// <returns>
|
|||
/// The number e raised to the power <paramref name="f" />.
|
|||
/// If <paramref name="f" /> equals <see cref="F:System.Single.NaN" /> or <see cref="F:System.Single.PositiveInfinity" />, that value is returned.
|
|||
/// If <paramref name="f" /> equals <see cref="F:System.Single.NegativeInfinity" />, 0 is returned.
|
|||
/// </returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public static float Exp(float f) |
|||
{ |
|||
return (float)Math.Exp(f); |
|||
} |
|||
|
|||
/// <summary>Returns the largest integer less than or equal to the specified single-precision floating-point number.</summary>
|
|||
/// <param name="f">A single-precision floating-point number. </param>
|
|||
/// <returns>The largest integer less than or equal to <paramref name="f" />.
|
|||
/// If <paramref name="f" /> is equal to <see cref="F:System.Single.NaN" />, <see cref="F:System.Single.NegativeInfinity" />,
|
|||
/// or <see cref="F:System.Single.PositiveInfinity" />, that value is returned.
|
|||
/// </returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public static float Floor(float f) |
|||
{ |
|||
return (float)Math.Floor(f); |
|||
} |
|||
|
|||
/// <summary>Returns the larger of two single-precision floating-point numbers.</summary>
|
|||
/// <param name="val1">The first of two single-precision floating-point numbers to compare. </param>
|
|||
/// <param name="val2">The second of two single-precision floating-point numbers to compare. </param>
|
|||
/// <returns>Parameter <paramref name="val1" /> or <paramref name="val2" />, whichever is larger.
|
|||
/// If <paramref name="val1" />, or <paramref name="val2" />, or both <paramref name="val1" /> and <paramref name="val2" /> are
|
|||
/// equal to <see cref="F:System.Single.NaN" />, <see cref="F:System.Single.NaN" /> is returned.
|
|||
/// </returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public static float Max(float val1, float val2) |
|||
{ |
|||
return Math.Max(val1, val2); |
|||
} |
|||
|
|||
/// <summary>Returns the smaller of two single-precision floating-point numbers.</summary>
|
|||
/// <param name="val1">The first of two single-precision floating-point numbers to compare. </param>
|
|||
/// <param name="val2">The second of two single-precision floating-point numbers to compare. </param>
|
|||
/// <returns>Parameter <paramref name="val1" /> or <paramref name="val2" />, whichever is smaller.
|
|||
/// If <paramref name="val1" />, <paramref name="val2" />, or both <paramref name="val1" /> and <paramref name="val2" /> are equal
|
|||
/// to <see cref="F:System.Single.NaN" />, <see cref="F:System.Single.NaN" /> is returned.</returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public static float Min(float val1, float val2) |
|||
{ |
|||
return Math.Min(val1, val2); |
|||
} |
|||
|
|||
/// <summary>Returns a specified number raised to the specified power.</summary>
|
|||
/// <param name="x">A single-precision floating-point number to be raised to a power. </param>
|
|||
/// <param name="y">A single-precision floating-point number that specifies a power. </param>
|
|||
/// <returns>The number <paramref name="x" /> raised to the power <paramref name="y" />.</returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public static float Pow(float x, float y) |
|||
{ |
|||
return (float)Math.Pow(x, y); |
|||
} |
|||
|
|||
/// <summary>Rounds a single-precision floating-point value to the nearest integral value.</summary>
|
|||
/// <param name="f">A single-precision floating-point number to be rounded. </param>
|
|||
/// <returns>
|
|||
/// The integer nearest <paramref name="f" />.
|
|||
/// If the fractional component of <paramref name="f" /> is halfway between two integers, one of which is even and the other odd, then the even number is returned.
|
|||
/// Note that this method returns a <see cref="T:System.Single" /> instead of an integral type.
|
|||
/// </returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public static float Round(float f) |
|||
{ |
|||
return (float)Math.Round(f); |
|||
} |
|||
|
|||
/// <summary>Returns the sine of the specified angle.</summary>
|
|||
/// <param name="f">An angle, measured in radians. </param>
|
|||
/// <returns>
|
|||
/// The sine of <paramref name="f" />.
|
|||
/// If <paramref name="f" /> is equal to <see cref="F:System.Single.NaN" />, <see cref="F:System.Single.NegativeInfinity" />,
|
|||
/// or <see cref="F:System.Single.PositiveInfinity" />, this method returns <see cref="F:System.Single.NaN" />.
|
|||
/// </returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public static float Sin(float f) |
|||
{ |
|||
return (float)Math.Sin(f); |
|||
} |
|||
|
|||
/// <summary>Returns the square root of a specified number.</summary>
|
|||
/// <param name="f">The number whose square root is to be found. </param>
|
|||
/// <returns>
|
|||
/// One of the values in the following table.
|
|||
/// <paramref name="f" /> parameter Return value Zero or positive The positive square root of <paramref name="f" />.
|
|||
/// Negative <see cref="F:System.Single.NaN" />Equals <see cref="F:System.Single.NaN" />
|
|||
/// <see cref="F:System.Single.NaN" />Equals <see cref="F:System.Single.PositiveInfinity" />
|
|||
/// <see cref="F:System.Single.PositiveInfinity" />
|
|||
/// </returns>
|
|||
[MethodImpl(MethodImplOptions.AggressiveInlining)] |
|||
public static float Sqrt(float f) |
|||
{ |
|||
return (float)Math.Sqrt(f); |
|||
} |
|||
} |
|||
} |
|||
Loading…
Reference in new issue