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Root/src/Graphics/PackedVector/NormalizedShort2.cs

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#region License
/* FNA - XNA4 Reimplementation for Desktop Platforms
 * Copyright 2009-2016 Ethan Lee and the MonoGame Team
 *
 * Released under the Microsoft Public License.
 * See LICENSE for details.
 */
#endregion
 
#region Using Statements
using System;
#endregion
 
namespace Microsoft.Xna.Framework.Graphics.PackedVector
{
    public struct NormalizedShort2 : IPackedVector<uint>, IEquatable<NormalizedShort2>
    {
        #region Public Properties
 
        [CLSCompliant(false)]
        public uint PackedValue
        {
            get
            {
                return packedValue;
            }
            set
            {
                packedValue = value;
            }
        }
 
        #endregion
 
        #region Private Variables
 
        private uint packedValue;
 
        #endregion
 
        #region Public Constructors
 
        public NormalizedShort2(Vector2 vector)
        {
            packedValue = Pack(vector.X, vector.Y);
        }
 
        public NormalizedShort2(float x, float y)
        {
            packedValue = Pack(x, y);
        }
 
        #endregion
 
        #region Public Methods
 
        public Vector2 ToVector2()
        {
            const float maxVal = 0x7FFF;
 
            return new Vector2(
                ((short) (packedValue & 0xFFFF)) / maxVal,
                ((short) (packedValue >> 0x10)) / maxVal
            );;
        }
 
        #endregion
 
        #region IPackedVector Methods
 
        void IPackedVector.PackFromVector4(Vector4 vector)
        {
            packedValue = Pack(vector.X, vector.Y);
        }
 
        Vector4 IPackedVector.ToVector4()
        {
            const float maxVal = 0x7FFF;
 
            return new Vector4(
                ((short) ((packedValue >> 0x00) & 0xFFFF)) / maxVal,
                ((short) ((packedValue >> 0x10) & 0xFFFF)) / maxVal,
                0,
                1
            );
        }
 
        #endregion
 
        #region Public Static Operators and Override Methods
 
        public static bool operator !=(NormalizedShort2 a, NormalizedShort2 b)
        {
            return !a.Equals(b);
        }
 
        public static bool operator ==(NormalizedShort2 a, NormalizedShort2 b)
        {
            return a.Equals(b);
        }
 
        public override bool Equals(object obj)
        {
            return (obj is NormalizedShort2) && Equals((NormalizedShort2) obj);
        }
 
        public bool Equals(NormalizedShort2 other)
        {
            return packedValue.Equals(other.packedValue);
        }
 
        public override int GetHashCode()
        {
            return packedValue.GetHashCode();
        }
 
        public override string ToString()
        {
            return packedValue.ToString("X");
        }
 
        #endregion
 
        #region Private Static Pack Method
 
        private static uint Pack(float vectorX, float vectorY)
        {
            const float maxPos = 0x7FFF;
            const float minNeg = -maxPos;
 
            // Round rather than truncate
            return (
                ((uint) ((int) MathHelper.Clamp((float) Math.Round(vectorX * maxPos), minNeg, maxPos) & 0xFFFF)) |
                ((uint) (((int) MathHelper.Clamp((float) Math.Round(vectorY * maxPos), minNeg, maxPos) & 0xFFFF) << 0x10))
            );
        }
 
        #endregion
    }
}

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