mirror of https://github.com/SixLabors/ImageSharp
Scott Williams
10 years ago
20 changed files with 206 additions and 744 deletions
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<SolutionConfiguration> |
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<FileVersion>1</FileVersion> |
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<InferProjectReferencesUsingAssemblyNames>false</InferProjectReferencesUsingAssemblyNames> |
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<AllowParallelTestExecution>false</AllowParallelTestExecution> |
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<AllowTestsToRunInParallelWithThemselves>true</AllowTestsToRunInParallelWithThemselves> |
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<FrameworkUtilisationTypeForNUnit>UseDynamicAnalysis</FrameworkUtilisationTypeForNUnit> |
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<FrameworkUtilisationTypeForGallio>UseStaticAnalysis</FrameworkUtilisationTypeForGallio> |
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<FrameworkUtilisationTypeForMSpec>UseStaticAnalysis</FrameworkUtilisationTypeForMSpec> |
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<FrameworkUtilisationTypeForMSTest>UseStaticAnalysis</FrameworkUtilisationTypeForMSTest> |
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<FrameworkUtilisationTypeForXUnit2>UseDynamicAnalysis</FrameworkUtilisationTypeForXUnit2> |
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<NCrunchCacheStoragePath /> |
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<MetricsExclusionList> |
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</MetricsExclusionList> |
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</SolutionConfiguration> |
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// <copyright file="PointF.cs" company="James Jackson-South">
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// Copyright (c) James Jackson-South and contributors.
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// Licensed under the Apache License, Version 2.0.
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// </copyright>
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namespace ImageSharp |
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{ |
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using System; |
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using System.ComponentModel; |
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using System.Numerics; |
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using System.Runtime.CompilerServices; |
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/// <summary>
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/// Represents an ordered pair of floating point x- and y-coordinates that defines a point in
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/// a two-dimensional plane.
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/// </summary>
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/// <remarks>
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/// This struct is fully mutable. This is done (against the guidelines) for the sake of performance,
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/// as it avoids the need to create new values for modification operations.
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/// </remarks>
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public struct PointF : IEquatable<PointF> |
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{ |
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/// <summary>
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/// Represents a <see cref="Point"/> that has X and Y values set to zero.
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/// </summary>
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public static readonly PointF Empty = default(PointF); |
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private Vector2 backingVector; |
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/// <summary>
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/// Initializes a new instance of the <see cref="PointF"/> struct.
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/// </summary>
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/// <param name="x">The horizontal position of the point.</param>
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/// <param name="y">The vertical position of the point.</param>
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public PointF(float x, float y) |
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: this(new Vector2(x, y)) |
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{ |
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} |
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/// <summary>
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/// Initializes a new instance of the <see cref="PointF"/> struct.
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/// </summary>
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/// <param name="vector">
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/// The vector representing the width and height.
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/// </param>
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public PointF(Vector2 vector) |
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{ |
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this.backingVector = vector; |
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} |
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/// <summary>
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/// Gets or sets the x-coordinate of this <see cref="PointF"/>.
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/// </summary>
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public float X |
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{ |
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get { return this.backingVector.X; } |
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set { this.backingVector.X = value; } |
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} |
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/// <summary>
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/// Gets or sets the y-coordinate of this <see cref="PointF"/>.
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/// </summary>
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public float Y |
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{ |
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get { return this.backingVector.Y; } |
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set { this.backingVector.Y = value; } |
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} |
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/// <summary>
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/// Gets a value indicating whether this <see cref="PointF"/> is empty.
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/// </summary>
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[EditorBrowsable(EditorBrowsableState.Never)] |
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public bool IsEmpty => this.Equals(Empty); |
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/// <summary>
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/// Performs an implicit conversion from <see cref="Point"/> to <see cref="PointF"/>.
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/// </summary>
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/// <param name="d">The d.</param>
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/// <returns>
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/// The result of the conversion.
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/// </returns>
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public static implicit operator PointF(Point d) |
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{ |
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return new PointF(d.ToVector2()); |
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} |
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/// <summary>
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/// Computes the sum of adding two points.
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/// </summary>
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/// <param name="left">The point on the left hand of the operand.</param>
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/// <param name="right">The point on the right hand of the operand.</param>
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/// <returns>
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/// The <see cref="Point"/>
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/// </returns>
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[MethodImpl(MethodImplOptions.AggressiveInlining)] |
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public static PointF operator +(PointF left, PointF right) |
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{ |
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return new PointF(left.backingVector + right.backingVector); |
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} |
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/// <summary>
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/// Computes the difference left by subtracting one point from another.
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/// </summary>
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/// <param name="left">The point on the left hand of the operand.</param>
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/// <param name="right">The point on the right hand of the operand.</param>
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/// <returns>
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/// The <see cref="PointF"/>
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/// </returns>
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[MethodImpl(MethodImplOptions.AggressiveInlining)] |
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public static PointF operator -(PointF left, PointF right) |
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{ |
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return new PointF(left.backingVector - right.backingVector); |
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} |
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/// <summary>
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/// Compares two <see cref="PointF"/> objects for equality.
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/// </summary>
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/// <param name="left">
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/// The <see cref="PointF"/> on the left side of the operand.
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/// </param>
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/// <param name="right">
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/// The <see cref="PointF"/> on the right side of the operand.
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/// </param>
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/// <returns>
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/// True if the current left is equal to the <paramref name="right"/> parameter; otherwise, false.
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/// </returns>
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[MethodImpl(MethodImplOptions.AggressiveInlining)] |
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public static bool operator ==(PointF left, PointF right) |
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{ |
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return left.Equals(right); |
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} |
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/// <summary>
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/// Compares two <see cref="Point"/> objects for inequality.
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/// </summary>
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/// <param name="left">
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/// The <see cref="Point"/> on the left side of the operand.
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/// </param>
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/// <param name="right">
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/// The <see cref="Point"/> on the right side of the operand.
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/// </param>
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/// <returns>
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/// True if the current left is unequal to the <paramref name="right"/> parameter; otherwise, false.
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/// </returns>
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[MethodImpl(MethodImplOptions.AggressiveInlining)] |
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public static bool operator !=(PointF left, PointF right) |
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{ |
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return !left.Equals(right); |
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} |
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/// <summary>
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/// Creates a rotation matrix for the given point and angle.
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/// </summary>
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/// <param name="origin">The origin point to rotate around</param>
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/// <param name="degrees">Rotation in degrees</param>
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/// <returns>The rotation <see cref="Matrix3x2"/></returns>
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public static Matrix3x2 CreateRotation(PointF origin, float degrees) |
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{ |
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float radians = ImageMaths.DegreesToRadians(degrees); |
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return Matrix3x2.CreateRotation(radians, new Vector2(origin.X, origin.Y)); |
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} |
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/// <summary>
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/// Rotates a point around a given a rotation matrix.
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/// </summary>
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/// <param name="point">The point to rotate</param>
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/// <param name="rotation">Rotation matrix used</param>
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/// <returns>The rotated <see cref="Point"/></returns>
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public static PointF Rotate(PointF point, Matrix3x2 rotation) |
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{ |
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return new PointF(Vector2.Transform(new Vector2(point.X, point.Y), rotation)); |
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} |
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/// <summary>
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/// Rotates a point around a given origin by the specified angle in degrees.
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/// </summary>
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/// <param name="point">The point to rotate</param>
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/// <param name="origin">The center point to rotate around.</param>
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/// <param name="degrees">The angle in degrees.</param>
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/// <returns>The rotated <see cref="Point"/></returns>
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public static PointF Rotate(PointF point, PointF origin, float degrees) |
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{ |
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return new PointF(Vector2.Transform(new Vector2(point.X, point.Y), CreateRotation(origin, degrees))); |
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} |
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/// <summary>
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/// Creates a skew matrix for the given point and angle.
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/// </summary>
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/// <param name="origin">The origin point to rotate around</param>
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/// <param name="degreesX">The x-angle in degrees.</param>
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/// <param name="degreesY">The y-angle in degrees.</param>
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/// <returns>The rotation <see cref="Matrix3x2"/></returns>
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public static Matrix3x2 CreateSkew(PointF origin, float degreesX, float degreesY) |
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{ |
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float radiansX = ImageMaths.DegreesToRadians(degreesX); |
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float radiansY = ImageMaths.DegreesToRadians(degreesY); |
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return Matrix3x2.CreateSkew(radiansX, radiansY, origin.backingVector); |
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} |
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/// <summary>
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/// Skews a point using a given a skew matrix.
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/// </summary>
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/// <param name="point">The point to rotate</param>
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/// <param name="skew">Rotation matrix used</param>
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/// <returns>The rotated <see cref="Point"/></returns>
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public static PointF Skew(PointF point, Matrix3x2 skew) |
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{ |
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return new PointF(Vector2.Transform(point.backingVector, skew)); |
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} |
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/// <summary>
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/// Skews a point around a given origin by the specified angles in degrees.
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/// </summary>
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/// <param name="point">The point to skew.</param>
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/// <param name="origin">The center point to rotate around.</param>
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/// <param name="degreesX">The x-angle in degrees.</param>
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/// <param name="degreesY">The y-angle in degrees.</param>
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/// <returns>The skewed <see cref="Point"/></returns>
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public static PointF Skew(PointF point, PointF origin, float degreesX, float degreesY) |
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{ |
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return new PointF(Vector2.Transform(point.backingVector, CreateSkew(origin, degreesX, degreesY))); |
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} |
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/// <summary>
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/// Gets a <see cref="Vector2"/> representation for this <see cref="Point"/>.
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/// </summary>
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/// <returns>A <see cref="Vector2"/> representation for this object.</returns>
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public Vector2 ToVector2() |
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{ |
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// should this be a return of the mutable vector2 backing vector instead of a copy?
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return new Vector2(this.X, this.Y); |
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} |
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/// <summary>
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/// Translates this <see cref="Point"/> by the specified amount.
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/// </summary>
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/// <param name="dx">The amount to offset the x-coordinate.</param>
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/// <param name="dy">The amount to offset the y-coordinate.</param>
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public void Offset(float dx, float dy) |
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{ |
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this.backingVector += new Vector2(dx, dy); |
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} |
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/// <summary>
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/// Translates this <see cref="PointF"/> by the specified amount.
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/// </summary>
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/// <param name="p">The <see cref="PointF"/> used offset this <see cref="PointF"/>.</param>
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public void Offset(PointF p) |
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{ |
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this.backingVector += p.backingVector; |
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} |
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/// <inheritdoc/>
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public override int GetHashCode() |
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{ |
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return this.backingVector.GetHashCode(); |
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} |
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/// <inheritdoc/>
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public override string ToString() |
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{ |
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if (this.IsEmpty) |
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{ |
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return "Point [ Empty ]"; |
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} |
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return $"Point [ X={this.X}, Y={this.Y} ]"; |
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} |
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/// <inheritdoc/>
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public override bool Equals(object obj) |
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{ |
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if (obj is PointF) |
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{ |
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return this.Equals((PointF)obj); |
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} |
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return false; |
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} |
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/// <inheritdoc/>
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public bool Equals(PointF other) |
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{ |
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return this.backingVector == other.backingVector; |
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} |
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} |
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} |
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