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Half2.cs
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Half2.cs
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// Copyright (c) Stride contributors (https://stride3d.net) and Silicon Studio Corp. (https://www.siliconstudio.co.jp)
// Distributed under the MIT license. See the LICENSE.md file in the project root for more information.
//
// Copyright (c) 2010-2011 SharpDX - Alexandre Mutel
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
using Stride.Core.Serialization;
namespace Stride.Core.Mathematics
{
/// <summary>
/// Represents a two dimensional mathematical vector with half-precision floats.
/// </summary>
[DataContract]
[StructLayout(LayoutKind.Sequential, Pack = 2)]
public struct Half2 : IEquatable<Half2>
{
/// <summary>
/// The size of the <see cref="Stride.Core.Mathematics.Half2"/> type, in bytes.
/// </summary>
public static readonly int SizeInBytes = Utilities.SizeOf<Half2>();
/// <summary>
/// A <see cref="Stride.Core.Mathematics.Half2"/> with all of its components set to zero.
/// </summary>
public static readonly Half2 Zero = new Half2();
/// <summary>
/// The X unit <see cref="Stride.Core.Mathematics.Half2"/> (1, 0).
/// </summary>
public static readonly Half2 UnitX = new Half2(1.0f, 0.0f);
/// <summary>
/// The Y unit <see cref="Stride.Core.Mathematics.Half2"/> (0, 1).
/// </summary>
public static readonly Half2 UnitY = new Half2(0.0f, 1.0f);
/// <summary>
/// A <see cref="Stride.Core.Mathematics.Half2"/> with all of its components set to one.
/// </summary>
public static readonly Half2 One = new Half2(1.0f, 1.0f);
/// <summary>
/// Gets or sets the X component of the vector.
/// </summary>
/// <value>The X component of the vector.</value>
public Half X;
/// <summary>
/// Gets or sets the Y component of the vector.
/// </summary>
/// <value>The Y component of the vector.</value>
public Half Y;
/// <summary>
/// Initializes a new instance of the <see cref="Half2"/> structure.
/// </summary>
/// <param name="x">The X component.</param>
/// <param name="y">The Y component.</param>
public Half2(Half x, Half y)
{
this.X = x;
this.Y = y;
}
/// <summary>
/// Initializes a new instance of the <see cref="Half2"/> structure.
/// </summary>
/// <param name="value">The value to set for both the X and Y components.</param>
public Half2(Half value)
{
this.X = value;
this.Y = value;
}
/// <summary>
/// Initializes a new instance of the <see cref="Stride.Core.Mathematics.Half2"/> struct.
/// </summary>
/// <param name="values">The values to assign to the X and Y components of the vector. This must be an array with two elements.</param>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="values"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentOutOfRangeException">Thrown when <paramref name="values"/> contains more or less than two elements.</exception>
public Half2(Half[] values)
{
if (values == null)
throw new ArgumentNullException("values");
if (values.Length != 2)
throw new ArgumentOutOfRangeException("values", "There must be two and only two input values for Half2.");
X = values[0];
Y = values[1];
}
/// <summary>
/// Initializes a new instance of the <see cref="Half2"/> structure.
/// </summary>
/// <param name="x">The X component.</param>
/// <param name="y">The Y component.</param>
public Half2(float x, float y)
{
this.X = (Half)x;
this.Y = (Half)y;
}
/// <summary>
/// Initializes a new instance of the <see cref="Half2"/> structure.
/// </summary>
/// <param name="value">The value to set for both the X and Y components.</param>
public Half2(float value)
{
this.X = (Half)value;
this.Y = (Half)value;
}
/// <summary>
/// Tests for equality between two objects.
/// </summary>
/// <param name="left">The first value to compare.</param>
/// <param name="right">The second value to compare.</param>
/// <returns>
/// <c>true</c> if <paramref name="left" /> has the same value as <paramref name="right" />; otherwise, <c>false</c>.</returns>
public static bool operator ==(Half2 left, Half2 right)
{
return Equals(ref left, ref right);
}
/// <summary>
/// Tests for inequality between two objects.
/// </summary>
/// <param name="left">The first value to compare.</param>
/// <param name="right">The second value to compare.</param>
/// <returns>
/// <c>true</c> if <paramref name="left" /> has a different value than <paramref name="right" />; otherwise, <c>false</c>.</returns>
[return: MarshalAs(UnmanagedType.U1)]
public static bool operator !=(Half2 left, Half2 right)
{
return !Equals(ref left, ref right);
}
/// <summary>
/// Returns the hash code for this instance.
/// </summary>
/// <returns>A 32-bit signed integer hash code.</returns>
public override int GetHashCode()
{
return (this.Y.GetHashCode() + this.X.GetHashCode());
}
/// <summary>
/// Determines whether the specified object instances are considered equal.
/// </summary>
/// <param name="value1">The first value.</param>
/// <param name="value2">The second value.</param>
/// <returns>
/// <c>true</c> if <paramref name="value1" /> is the same instance as <paramref name="value2" /> or
/// if both are <c>null</c> references or if <c>value1.Equals(value2)</c> returns <c>true</c>; otherwise, <c>false</c>.</returns>
public static bool Equals(ref Half2 value1, ref Half2 value2)
{
return ((value1.X == value2.X) && (value1.Y == value2.Y));
}
/// <summary>
/// Returns a value that indicates whether the current instance is equal to the specified object.
/// </summary>
/// <param name="other">Object to make the comparison with.</param>
/// <returns>
/// <c>true</c> if the current instance is equal to the specified object; <c>false</c> otherwise.</returns>
public bool Equals(Half2 other)
{
return ((this.X == other.X) && (this.Y == other.Y));
}
/// <summary>
/// Returns a value that indicates whether the current instance is equal to a specified object.
/// </summary>
/// <param name="obj">Object to make the comparison with.</param>
/// <returns>
/// <c>true</c> if the current instance is equal to the specified object; <c>false</c> otherwise.</returns>
public override bool Equals(object obj)
{
if (obj == null)
{
return false;
}
if (obj.GetType() != GetType())
{
return false;
}
return this.Equals((Half2)obj);
}
/// <summary>
/// Performs an explicit conversion from <see cref="Vector2"/> to <see cref="Half2"/>.
/// </summary>
/// <param name="value">The value.</param>
/// <returns>The result of the conversion.</returns>
public static explicit operator Half2(Vector2 value)
{
return new Half2((Half)value.X, (Half)value.Y);
}
/// <summary>
/// Performs an explicit conversion from <see cref="Half2"/> to <see cref="Vector2"/>.
/// </summary>
/// <param name="value">The value.</param>
/// <returns>The result of the conversion.</returns>
public static explicit operator Vector2(Half2 value)
{
return new Vector2(value.X, value.Y);
}
}
}