#region Using Statements
using System;
#endregion // Using Statements
#region License
//
// This file is part of the ANX.Framework created by the "ANX.Framework developer group".
//
// This file is released under the Ms-PL license.
//
//
//
// Microsoft Public License (Ms-PL)
//
// This license governs use of the accompanying software. If you use the software, you accept this license.
// If you do not accept the license, do not use the software.
//
// 1.Definitions
// The terms "reproduce," "reproduction," "derivative works," and "distribution" have the same meaning
// here as under U.S. copyright law.
// A "contribution" is the original software, or any additions or changes to the software.
// A "contributor" is any person that distributes its contribution under this license.
// "Licensed patents" are a contributor's patent claims that read directly on its contribution.
//
// 2.Grant of Rights
// (A) Copyright Grant- Subject to the terms of this license, including the license conditions and limitations
// in section 3, each contributor grants you a non-exclusive, worldwide, royalty-free copyright license to
// reproduce its contribution, prepare derivative works of its contribution, and distribute its contribution
// or any derivative works that you create.
// (B) Patent Grant- Subject to the terms of this license, including the license conditions and limitations in
// section 3, each contributor grants you a non-exclusive, worldwide, royalty-free license under its licensed
// patents to make, have made, use, sell, offer for sale, import, and/or otherwise dispose of its contribution
// in the software or derivative works of the contribution in the software.
//
// 3.Conditions and Limitations
// (A) No Trademark License- This license does not grant you rights to use any contributors' name, logo, or trademarks.
// (B) If you bring a patent claim against any contributor over patents that you claim are infringed by the software, your
// patent license from such contributor to the software ends automatically.
// (C) If you distribute any portion of the software, you must retain all copyright, patent, trademark, and attribution
// notices that are present in the software.
// (D) If you distribute any portion of the software in source code form, you may do so only under this license by including
// a complete copy of this license with your distribution. If you distribute any portion of the software in compiled or
// object code form, you may only do so under a license that complies with this license.
// (E) The software is licensed "as-is." You bear the risk of using it. The contributors give no express warranties, guarantees,
// or conditions. You may have additional consumer rights under your local laws which this license cannot change. To the
// extent permitted under your local laws, the contributors exclude the implied warranties of merchantability, fitness for a
// particular purpose and non-infringement.
#endregion // License
namespace ANX.Framework.Graphics.PackedVector
{
public struct NormalizedByte4 : IPackedVector<uint>, IEquatable<NormalizedByte4>, IPackedVector
{
private uint packedValue;
private const float max = (float)(255 >> 1);
private const float oneOverMax = 1f / max;
private const uint mask = (uint)(256 >> 1);
public NormalizedByte4(float x, float y, float z, float w)
{
uint b1 = (uint)(((int)MathHelper.Clamp(x * max, -max, max) & 255) << 0);
uint b2 = (uint)(((int)MathHelper.Clamp(y * max, -max, max) & 255) << 8);
uint b3 = (uint)(((int)MathHelper.Clamp(z * max, -max, max) & 255) << 16);
uint b4 = (uint)(((int)MathHelper.Clamp(w * max, -max, max) & 255) << 24);
this.packedValue = (uint)(b1 | b2 | b3 | b4);
}
public NormalizedByte4(Vector4 vector)
{
uint b1 = (uint)(((int)MathHelper.Clamp(vector.X * max, -max, max) & 255) << 0);
uint b2 = (uint)(((int)MathHelper.Clamp(vector.Y * max, -max, max) & 255) << 8);
uint b3 = (uint)(((int)MathHelper.Clamp(vector.Z * max, -max, max) & 255) << 16);
uint b4 = (uint)(((int)MathHelper.Clamp(vector.W * max, -max, max) & 255) << 24);
this.packedValue = (uint)(b1 | b2 | b3 | b4);
}
public uint PackedValue
{
get
{
return this.packedValue;
}
set
{
this.packedValue = value;
}
}
public Vector4 ToVector4()
{
Vector4 vector;
vector.X = convert(0xff, (uint)this.packedValue);
vector.Y = convert(0xff, (uint)(this.packedValue >> 8));
vector.Z = convert(0xff, (uint)(this.packedValue >> 16));
vector.W = convert(0xff, (uint)(this.packedValue >> 24));
return vector;
}
private static float convert(uint bitmask, uint value)
{
if ((value & mask) != 0)
{
if ((value & 255) >= mask)
{
return -1f;
}
value |= ~bitmask;
}
else
{
value &= 255;
}
return (((float)value) * oneOverMax);
}
void IPackedVector.PackFromVector4(Vector4 vector)
{
uint b1 = (uint)(((int)MathHelper.Clamp(vector.X * max, -max, max) & 255) << 0);
uint b2 = (uint)(((int)MathHelper.Clamp(vector.Y * max, -max, max) & 255) << 8);
uint b3 = (uint)(((int)MathHelper.Clamp(vector.Z * max, -max, max) & 255) << 16);
uint b4 = (uint)(((int)MathHelper.Clamp(vector.W * max, -max, max) & 255) << 24);
this.packedValue = (uint)(b1 | b2 | b3 | b4);
}
Vector4 IPackedVector.ToVector4()
{
return this.ToVector4();
}
public override bool Equals(object obj)
{
if (obj != null && obj.GetType() == this.GetType())
{
return this == (NormalizedByte4)obj;
}
return false;
}
public bool Equals(NormalizedByte4 other)
{
return this.packedValue == other.packedValue;
}
public override string ToString()
{
return this.packedValue.ToString("X8");
}
public override int GetHashCode()
{
return this.packedValue.GetHashCode();
}
public static bool operator ==(NormalizedByte4 lhs, NormalizedByte4 rhs)
{
return lhs.packedValue == rhs.packedValue;
}
public static bool operator !=(NormalizedByte4 lhs, NormalizedByte4 rhs)
{
return lhs.packedValue != rhs.packedValue;
}
}
}