118 lines
3.5 KiB
C#
118 lines
3.5 KiB
C#
#region Using Statements
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using System;
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using ANX.Framework.NonXNA.Development;
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#endregion // Using Statements
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// This file is part of the ANX.Framework created by the
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// "ANX.Framework developer group" and released under the Ms-PL license.
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// For details see: http://anxframework.codeplex.com/license
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namespace ANX.Framework.Graphics.PackedVector
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{
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[PercentageComplete(100)]
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[Developer("Glatzemann")]
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[TestState(TestStateAttribute.TestState.Tested)]
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public struct NormalizedByte2 : IPackedVector<ushort>, IEquatable<NormalizedByte2>, IPackedVector
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{
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private ushort packedValue;
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[CLSCompliant(false)]
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public ushort PackedValue
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{
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get { return packedValue; }
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set { packedValue = value; }
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}
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private const float max = 255 >> 1;
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private const float oneOverMax = 1f / max;
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private const uint mask = 256 >> 1;
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public NormalizedByte2(float x, float y)
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{
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ushort b1 = (ushort)(((int)MathHelper.Clamp(x * max, -max, max) & 255) << 0);
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ushort b2 = (ushort)(((int)MathHelper.Clamp(y * max, -max, max) & 255) << 8);
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this.packedValue = (UInt16)(b1 | b2);
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}
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public NormalizedByte2(Vector2 vector)
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{
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ushort b1 = (ushort)(((int)MathHelper.Clamp(vector.X * max, -max, max) & 255) << 0);
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ushort b2 = (ushort)(((int)MathHelper.Clamp(vector.Y * max, -max, max) & 255) << 8);
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this.packedValue = (UInt16)(b1 | b2);
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}
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public Vector2 ToVector2()
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{
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Vector2 vector;
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vector.X = convert(0xff, (uint)this.packedValue);
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vector.Y = convert(0xff, (uint)(this.packedValue >> 8));
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return vector;
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}
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private static float convert(uint bitmask, uint value)
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{
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if ((value & mask) != 0)
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{
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if ((value & 255) >= mask)
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{
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return -1f;
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}
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value |= ~bitmask;
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}
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else
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{
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value &= 255;
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}
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return (((float)value) * oneOverMax);
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}
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void IPackedVector.PackFromVector4(Vector4 vector)
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{
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ushort b1 = (ushort)(((int)MathHelper.Clamp(vector.X * max, -max, max) & 255) << 0);
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ushort b2 = (ushort)(((int)MathHelper.Clamp(vector.Y * max, -max, max) & 255) << 8);
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this.packedValue = (UInt16)(b1 | b2);
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}
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Vector4 IPackedVector.ToVector4()
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{
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Vector2 val = this.ToVector2();
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return new Vector4(val.X, val.Y, 0f, 1f);
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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 && this == (NormalizedByte2)obj;
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}
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public bool Equals(NormalizedByte2 other)
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{
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return this.packedValue == other.packedValue;
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}
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public override string ToString()
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{
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return this.ToVector2().ToString();
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}
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public override int GetHashCode()
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{
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return this.packedValue.GetHashCode();
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}
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public static bool operator ==(NormalizedByte2 lhs, NormalizedByte2 rhs)
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{
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return lhs.packedValue == rhs.packedValue;
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}
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public static bool operator !=(NormalizedByte2 lhs, NormalizedByte2 rhs)
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{
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return lhs.packedValue != rhs.packedValue;
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}
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}
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}
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