mirror of https://github.com/SixLabors/ImageSharp
James Jackson-South
9 years ago
8 changed files with 266 additions and 120 deletions
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using System; |
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using System.Runtime.CompilerServices; |
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namespace SixLabors |
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{ |
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/// <summary>
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/// Provides common mathematical methods.
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/// </summary>
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internal static class MathFExtensions |
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{ |
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/// <summary>
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/// Converts a degree (360-periodic) angle to a radian (2*Pi-periodic) angle.
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/// </summary>
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/// <param name="degree">The angle in degrees.</param>
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/// <returns>
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/// The <see cref="float"/> representing the degree as radians.
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/// </returns>
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[MethodImpl(MethodImplOptions.AggressiveInlining)] |
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public static float DegreeToRadian(float degree) |
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{ |
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return degree * (MathF.PI / 180F); |
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} |
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/// <summary>
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/// Converts a radian (2*Pi-periodic) angle to a degree (360-periodic) angle.
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/// </summary>
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/// <param name="radian">The angle in radians.</param>
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/// <returns>
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/// The <see cref="float"/> representing the degree as radians.
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/// </returns>
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[MethodImpl(MethodImplOptions.AggressiveInlining)] |
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public static float RadianToDegree(float radian) |
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{ |
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return radian / (MathF.PI / 180F); |
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} |
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} |
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} |
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@ -1,49 +1,50 @@ |
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<Project Sdk="Microsoft.NET.Sdk"> |
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<PropertyGroup> |
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<Description>Low level primitives for use across Six Labors projects..</Description> |
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<VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix> |
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<VersionPrefix Condition="$(packageversion) == ''">0.1.0-alpha2</VersionPrefix> |
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<Authors>Six Labors</Authors> |
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<TargetFramework>netstandard1.1</TargetFramework> |
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<AllowUnsafeBlocks>true</AllowUnsafeBlocks> |
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<GenerateDocumentationFile>true</GenerateDocumentationFile> |
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<AssemblyName>SixLabors.Core</AssemblyName> |
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<PackageId>SixLabors.Core</PackageId> |
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<PackageTags>rectangle;point;size,primitives</PackageTags> |
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<PackageIconUrl>https://raw.githubusercontent.com/SixLabors/Home/master/logo.png</PackageIconUrl> |
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<PackageProjectUrl>https://github.com/SixLabors/Core</PackageProjectUrl> |
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<PackageLicenseUrl>http://www.apache.org/licenses/LICENSE-2.0</PackageLicenseUrl> |
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<RepositoryType>git</RepositoryType> |
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<RepositoryUrl>https://github.com/SixLabors/Core</RepositoryUrl> |
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<GenerateAssemblyDescriptionAttribute>false</GenerateAssemblyDescriptionAttribute> |
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<GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute> |
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<GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute> |
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<GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute> |
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<GenerateAssemblyCopyrightAttribute>false</GenerateAssemblyCopyrightAttribute> |
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<GenerateNeutralResourcesLanguageAttribute>false</GenerateNeutralResourcesLanguageAttribute> |
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<GenerateAssemblyVersionAttribute>false</GenerateAssemblyVersionAttribute> |
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<GenerateAssemblyFileVersionAttribute>false</GenerateAssemblyFileVersionAttribute> |
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<GenerateAssemblyInformationalVersionAttribute>false</GenerateAssemblyInformationalVersionAttribute> |
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<GenerateAssemblyTitleAttribute>false</GenerateAssemblyTitleAttribute> |
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<DebugType Condition="$(codecov) == 'true'">full</DebugType> |
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<RootNamespace>SixLabors</RootNamespace> |
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</PropertyGroup> |
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<PropertyGroup> |
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<Description>Low level primitives for use across Six Labors projects..</Description> |
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<VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix> |
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<VersionPrefix Condition="$(packageversion) == ''">0.1.0-alpha2</VersionPrefix> |
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<Authors>Six Labors</Authors> |
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<TargetFrameworks>netstandard1.1;netcoreapp2.0;</TargetFrameworks> |
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<AllowUnsafeBlocks>true</AllowUnsafeBlocks> |
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<GenerateDocumentationFile>true</GenerateDocumentationFile> |
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<AssemblyName>SixLabors.Core</AssemblyName> |
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<PackageId>SixLabors.Core</PackageId> |
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<PackageTags>rectangle;point;size,primitives</PackageTags> |
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<PackageIconUrl>https://raw.githubusercontent.com/SixLabors/Home/master/logo.png</PackageIconUrl> |
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<PackageProjectUrl>https://github.com/SixLabors/Core</PackageProjectUrl> |
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<PackageLicenseUrl>http://www.apache.org/licenses/LICENSE-2.0</PackageLicenseUrl> |
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<RepositoryType>git</RepositoryType> |
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<RepositoryUrl>https://github.com/SixLabors/Core</RepositoryUrl> |
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<GenerateAssemblyDescriptionAttribute>false</GenerateAssemblyDescriptionAttribute> |
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<GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute> |
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<GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute> |
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<GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute> |
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<GenerateAssemblyCopyrightAttribute>false</GenerateAssemblyCopyrightAttribute> |
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<GenerateNeutralResourcesLanguageAttribute>false</GenerateNeutralResourcesLanguageAttribute> |
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<GenerateAssemblyVersionAttribute>false</GenerateAssemblyVersionAttribute> |
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<GenerateAssemblyFileVersionAttribute>false</GenerateAssemblyFileVersionAttribute> |
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<GenerateAssemblyInformationalVersionAttribute>false</GenerateAssemblyInformationalVersionAttribute> |
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<GenerateAssemblyTitleAttribute>false</GenerateAssemblyTitleAttribute> |
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<DebugType Condition="$(codecov) == 'true'">full</DebugType> |
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<RootNamespace>SixLabors</RootNamespace> |
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</PropertyGroup> |
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<PropertyGroup> |
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<CodeAnalysisRuleSet>..\SixLabors.ruleset</CodeAnalysisRuleSet> |
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</PropertyGroup> |
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<PropertyGroup> |
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<CodeAnalysisRuleSet>..\SixLabors.ruleset</CodeAnalysisRuleSet> |
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</PropertyGroup> |
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<ItemGroup> |
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<AdditionalFiles Include="..\..\stylecop.json" /> |
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<Content Include="..\..\stylecop.json" Link="stylecop.json" /> |
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</ItemGroup> |
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<ItemGroup> |
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<PackageReference Include="StyleCop.Analyzers" Version="1.1.0-beta004"> |
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<PrivateAssets>All</PrivateAssets> |
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</PackageReference> |
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<PackageReference Include="System.Numerics.Vectors" Version="4.4.0" /> |
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</ItemGroup> |
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<ItemGroup> |
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<AdditionalFiles Include="..\..\stylecop.json" /> |
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<Content Include="..\..\stylecop.json" Link="stylecop.json" /> |
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</ItemGroup> |
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<ItemGroup> |
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<PackageReference Include="StyleCop.Analyzers" Version="1.1.0-beta004"> |
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<PrivateAssets>All</PrivateAssets> |
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</PackageReference> |
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</ItemGroup> |
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<ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.1'"> |
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<PackageReference Include="System.Numerics.Vectors" Version="4.4.0" /> |
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</ItemGroup> |
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</Project> |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using System; |
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using System.Collections.Generic; |
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using System.Numerics; |
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namespace SixLabors.Tests.Helpers |
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{ |
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/// <summary>
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/// Allows the comparison of single-precision floating point values by precision.
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/// </summary>
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public struct FloatRoundingComparer : IEqualityComparer<float>, IEqualityComparer<Vector4> |
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{ |
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/// <summary>
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/// Initializes a new instance of the <see cref="FloatRoundingComparer"/> struct.
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/// </summary>
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/// <param name="precision">The number of decimal places (valid values: 0-7)</param>
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public FloatRoundingComparer(int precision) |
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{ |
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Guard.MustBeBetweenOrEqualTo(precision, 0, 7, nameof(precision)); |
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this.Precision = precision; |
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} |
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/// <summary>
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/// Gets the number of decimal places (valid values: 0-7)
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/// </summary>
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public int Precision { get; } |
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/// <inheritdoc />
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public bool Equals(float x, float y) |
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{ |
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float xp = (float)Math.Round(x, this.Precision, MidpointRounding.AwayFromZero); |
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float yp = (float)Math.Round(y, this.Precision, MidpointRounding.AwayFromZero); |
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return Comparer<float>.Default.Compare(xp, yp) == 0; |
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} |
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/// <inheritdoc />
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public bool Equals(Vector4 x, Vector4 y) |
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{ |
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return this.Equals(x.X, y.X) && this.Equals(x.Y, y.Y) && this.Equals(x.Z, y.Z) && this.Equals(x.W, y.W); |
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} |
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/// <inheritdoc />
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public int GetHashCode(float obj) |
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{ |
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unchecked |
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{ |
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int hashCode = obj.GetHashCode(); |
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hashCode = (hashCode * 397) ^ this.Precision.GetHashCode(); |
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return hashCode; |
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} |
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} |
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/// <inheritdoc />
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public int GetHashCode(Vector4 obj) => HashHelpers.Combine(obj.GetHashCode(), this.Precision.GetHashCode()); |
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} |
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} |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using System; |
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using Xunit; |
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namespace SixLabors.Tests.Helpers |
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{ |
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public class MathFTests |
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{ |
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[Fact] |
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public void MathF_PI_Is_Equal() |
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{ |
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Assert.Equal(MathF.PI, (float)Math.PI); |
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} |
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[Fact] |
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public void MathF_Ceililng_Is_Equal() |
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{ |
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Assert.Equal(MathF.Ceiling(0.3333F), (float)Math.Ceiling(0.3333F)); |
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} |
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[Fact] |
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public void MathF_Cos_Is_Equal() |
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{ |
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Assert.Equal(MathF.Cos(0.3333F), (float)Math.Cos(0.3333F)); |
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} |
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[Fact] |
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public void MathF_Abs_Is_Equal() |
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{ |
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Assert.Equal(MathF.Abs(-0.3333F), (float)Math.Abs(-0.3333F)); |
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} |
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[Fact] |
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public void MathF_Atan2_Is_Equal() |
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{ |
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Assert.Equal(MathF.Atan2(1.2345F, 1.2345F), (float)Math.Atan2(1.2345F, 1.2345F)); |
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} |
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[Fact] |
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public void MathF_Exp_Is_Equal() |
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{ |
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Assert.Equal(MathF.Exp(1.2345F), (float)Math.Exp(1.2345F)); |
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} |
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[Fact] |
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public void MathF_Floor_Is_Equal() |
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{ |
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Assert.Equal(MathF.Floor(1.2345F), (float)Math.Floor(1.2345F)); |
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} |
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[Fact] |
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public void MathF_Min_Is_Equal() |
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{ |
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Assert.Equal(MathF.Min(1.2345F, 5.4321F), (float)Math.Min(1.2345F, 5.4321F)); |
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} |
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[Fact] |
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public void MathF_Max_Is_Equal() |
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{ |
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Assert.Equal(MathF.Max(1.2345F, 5.4321F), (float)Math.Max(1.2345F, 5.4321F)); |
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} |
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[Fact] |
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public void MathF_Pow_Is_Equal() |
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{ |
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Assert.Equal(MathF.Pow(1.2345F, 5.4321F), (float)Math.Pow(1.2345F, 5.4321F)); |
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} |
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[Fact] |
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public void MathF_Round_Is_Equal() |
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{ |
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Assert.Equal(MathF.Round(1.2345F), (float)Math.Round(1.2345F)); |
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} |
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[Fact] |
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public void MathF_Round_With_Midpoint_Is_Equal() |
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{ |
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Assert.Equal(MathF.Round(1.2345F, MidpointRounding.AwayFromZero), (float)Math.Round(1.2345F, MidpointRounding.AwayFromZero)); |
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} |
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[Fact] |
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public void MathF_Sin_Is_Equal() |
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{ |
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Assert.Equal(MathF.Sin(1.2345F), (float)Math.Sin(1.2345F)); |
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} |
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[Fact] |
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public void MathF_Sqrt_Is_Equal() |
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{ |
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Assert.Equal(MathF.Sqrt(2F), (float)Math.Sqrt(2F)); |
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} |
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[Fact] |
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public void Convert_Degree_To_Radian() |
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{ |
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Assert.Equal((float)(Math.PI / 2D), MathFExtensions.DegreeToRadian(90F), new FloatRoundingComparer(6)); |
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} |
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[Fact] |
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public void Convert_Radian_To_Degree() |
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{ |
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Assert.Equal(60F, MathFExtensions.RadianToDegree((float)(Math.PI / 3D)), new FloatRoundingComparer(5)); |
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} |
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} |
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} |
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