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#region License
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/* FNA - XNA4 Reimplementation for Desktop Platforms
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* Copyright 2009-2020 Ethan Lee and the MonoGame Team
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*
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* Released under the Microsoft Public License.
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* See LICENSE for details.
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*/
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#endregion
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#region Using Statements
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using System;
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#endregion
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namespace Microsoft.Xna.Framework.Graphics.PackedVector
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{
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public struct NormalizedByte2 : IPackedVector<ushort>, IEquatable<NormalizedByte2>
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{
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#region Public Properties
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[CLSCompliant(false)]
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public ushort PackedValue
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{
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get
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{
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return packedValue;
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}
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set
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{
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packedValue = value;
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}
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}
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#endregion
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#region Private Variables
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private ushort packedValue;
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#endregion
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#region Public Constructors
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public NormalizedByte2(Vector2 vector)
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{
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packedValue = Pack(vector.X, vector.Y);
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}
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public NormalizedByte2(float x, float y)
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{
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packedValue = Pack(x, y);
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}
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#endregion
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#region Public Methods
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public Vector2 ToVector2()
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{
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return new Vector2(
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((sbyte) (packedValue & 0xFF)) / 127.0f,
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((sbyte) ((packedValue >> 8) & 0xFF)) / 127.0f
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);
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}
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#endregion
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#region IPackedVector Methods
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void IPackedVector.PackFromVector4(Vector4 vector)
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{
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packedValue = Pack(vector.X, vector.Y);
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}
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Vector4 IPackedVector.ToVector4()
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{
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return new Vector4(ToVector2(), 0.0f, 1.0f);
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}
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#endregion
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#region Public Static Operators and Override Methods
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public static bool operator !=(NormalizedByte2 a, NormalizedByte2 b)
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{
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return a.packedValue != b.packedValue;
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}
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public static bool operator ==(NormalizedByte2 a, NormalizedByte2 b)
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{
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return a.packedValue == b.packedValue;
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}
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public override bool Equals(object obj)
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{
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return (obj is NormalizedByte2) && Equals((NormalizedByte2) obj);
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}
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public bool Equals(NormalizedByte2 other)
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{
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return packedValue == other.packedValue;
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}
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public override int GetHashCode()
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{
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return packedValue.GetHashCode();
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}
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public override string ToString()
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{
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return packedValue.ToString("X");
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}
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#endregion
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#region Private Static Pack Method
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private static ushort Pack(float x, float y)
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{
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int byte2 = (
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((ushort)
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Math.Round(MathHelper.Clamp(x, -1.0f, 1.0f) * 127.0f)
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)
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) & 0x00FF;
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int byte1 = (
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((ushort)
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Math.Round(MathHelper.Clamp(y, -1.0f, 1.0f) * 127.0f)
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) << 8
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) & 0xFF00;
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return (ushort) (byte2 | byte1);
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}
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#endregion
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}
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}
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