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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | #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 Statementsusing System;#endregionnamespace Microsoft.Xna.Framework.Graphics.PackedVector{ /// <summary> /// Packed vector type containing unsigned normalized values ranging from 0 to 1. /// The x and z components use 5 bits, and the y component uses 6 bits. /// </summary> public struct Alpha8 : IPackedVector<byte>, IEquatable<Alpha8>, IPackedVector { #region Public Properties /// <summary> /// Gets and sets the packed value. /// </summary> [CLSCompliant(false)] public byte PackedValue { get { return packedValue; } set { packedValue = value; } } #endregion #region Private Variables private byte packedValue; #endregion #region Public Constructor /// <summary> /// Creates a new instance of Alpha8. /// </summary> /// <param name="alpha">The alpha component</param> public Alpha8(float alpha) { packedValue = Pack(alpha); } #endregion #region Public Methods /// <summary> /// Gets the packed vector in float format. /// </summary> /// <returns>The packed vector in Vector3 format</returns> public float ToAlpha() { return (float) (packedValue / 255.0f); } #endregion #region IPackedVector Methods /// <summary> /// Sets the packed vector from a Vector4. /// </summary> /// <param name="vector">Vector containing the components.</param> void IPackedVector.PackFromVector4(Vector4 vector) { packedValue = Pack(vector.W); } /// <summary> /// Gets the packed vector in Vector4 format. /// </summary> /// <returns>The packed vector in Vector4 format</returns> Vector4 IPackedVector.ToVector4() { return new Vector4( 0.0f, 0.0f, 0.0f, (float) (packedValue / 255.0f) ); } #endregion #region Public Static Operators and Override Methods /// <summary> /// Compares an object with the packed vector. /// </summary> /// <param name="obj">The object to compare.</param> /// <returns>True if the object is equal to the packed vector.</returns> public override bool Equals(object obj) { return (obj is Alpha8) && Equals((Alpha8) obj); } /// <summary> /// Compares another Bgra5551 packed vector with the packed vector. /// </summary> /// <param name="other">The Bgra5551 packed vector to compare.</param> /// <returns>True if the packed vectors are equal.</returns> public bool Equals(Alpha8 other) { return packedValue == other.packedValue; } /// <summary> /// Gets a string representation of the packed vector. /// </summary> /// <returns>A string representation of the packed vector.</returns> public override string ToString() { return (packedValue / 255.0f).ToString(); } /// <summary> /// Gets a hash code of the packed vector. /// </summary> /// <returns>The hash code for the packed vector.</returns> public override int GetHashCode() { return packedValue.GetHashCode(); } public static bool operator ==(Alpha8 lhs, Alpha8 rhs) { return lhs.packedValue == rhs.packedValue; } public static bool operator !=(Alpha8 lhs, Alpha8 rhs) { return lhs.packedValue != rhs.packedValue; } #endregion #region Private Static Pack Method private static byte Pack(float alpha) { return (byte) ( MathHelper.Clamp(alpha, 0, 1) * 255.0f ); } #endregion }} |
