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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 NormalizedByte4 : IPackedVector<uint>, IEquatable<NormalizedByte4>
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{
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#region Public Properties
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[CLSCompliant(false)]
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public uint 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 uint packedValue;
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#endregion
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#region Public Constructors
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public NormalizedByte4(Vector4 vector)
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{
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packedValue = Pack(vector.X, vector.Y, vector.Z, vector.W);
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}
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public NormalizedByte4(float x, float y, float z, float w)
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{
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packedValue = Pack(x, y, z, w);
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}
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#endregion
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#region Public Methods
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public Vector4 ToVector4()
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{
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return new Vector4(
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((sbyte) (packedValue & 0xFF)) / 127.0f,
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((sbyte) ((packedValue >> 8) & 0xFF)) / 127.0f,
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((sbyte) ((packedValue >> 16) & 0xFF)) / 127.0f,
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((sbyte) ((packedValue >> 24) & 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, vector.Z, vector.W);
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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 !=(NormalizedByte4 a, NormalizedByte4 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 ==(NormalizedByte4 a, NormalizedByte4 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 NormalizedByte4) && Equals((NormalizedByte4) obj);
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}
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public bool Equals(NormalizedByte4 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 uint Pack(float x, float y, float z, float w)
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{
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uint byte4 = (
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(uint) Math.Round(MathHelper.Clamp(x, -1.0f, 1.0f) * 127.0f)
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) & 0x000000FF;
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uint byte3 = (
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(
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(uint) Math.Round(MathHelper.Clamp(y, -1.0f, 1.0f) * 127.0f)
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) << 8
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) & 0x0000FF00;
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uint byte2 = (
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(
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(uint) Math.Round(MathHelper.Clamp(z, -1.0f, 1.0f) * 127.0f)
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) << 16
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) & 0x00FF0000;
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uint byte1 = (
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(
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(uint) Math.Round(MathHelper.Clamp(w, -1.0f, 1.0f) * 127.0f)
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) << 24
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) & 0xFF000000;
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return byte4 | byte3 | byte2 | byte1;
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}
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#endregion
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}
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}
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