2022-02-23 05:14:32 +00:00
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#region License
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2021-01-20 23:16:37 +00:00
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/* MoonWorks - Game Development Framework
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* Copyright 2021 Evan Hemsley
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*/
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/* Derived from code by Ethan Lee (Copyright 2009-2021).
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* Released under the Microsoft Public License.
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* See fna.LICENSE for details.
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* Derived from code by the Mono.Xna Team (Copyright 2006).
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* Released under the MIT License. See monoxna.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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using MoonWorks.Math;
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2022-05-11 17:34:09 +00:00
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using MoonWorks.Math.Float;
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2021-01-20 23:16:37 +00:00
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#endregion
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2023-09-19 23:50:08 +00:00
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namespace MoonWorks.Graphics.PackedVector
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2021-01-20 23:16:37 +00:00
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{
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/// <summary>
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/// Packed vector type containing unsigned normalized values ranging from 0 to 1.
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/// The x and z components use 5 bits, and the y component uses 6 bits.
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/// </summary>
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public struct Alpha8 : IPackedVector<byte>, IEquatable<Alpha8>, IPackedVector
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{
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#region Public Properties
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/// <summary>
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/// Gets and sets the packed value.
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/// </summary>
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public byte 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 byte packedValue;
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#endregion
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#region Public Constructor
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/// <summary>
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/// Creates a new instance of Alpha8.
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/// </summary>
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/// <param name="alpha">The alpha component</param>
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public Alpha8(float alpha)
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{
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packedValue = Pack(alpha);
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}
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#endregion
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#region Public Methods
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/// <summary>
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/// Gets the packed vector in float format.
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/// </summary>
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/// <returns>The packed vector in Vector3 format</returns>
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public float ToAlpha()
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{
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return (float) (packedValue / 255.0f);
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}
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#endregion
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#region IPackedVector Methods
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/// <summary>
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/// Sets the packed vector from a Vector4.
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/// </summary>
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/// <param name="vector">Vector containing the components.</param>
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void IPackedVector.PackFromVector4(Vector4 vector)
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{
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packedValue = Pack(vector.W);
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}
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/// <summary>
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/// Gets the packed vector in Vector4 format.
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/// </summary>
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/// <returns>The packed vector in Vector4 format</returns>
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Vector4 IPackedVector.ToVector4()
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{
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return new Vector4(
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0.0f,
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0.0f,
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0.0f,
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(float) (packedValue / 255.0f)
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);
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}
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#endregion
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#region Public Static Operators and Override Methods
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/// <summary>
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/// Compares an object with the packed vector.
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/// </summary>
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/// <param name="obj">The object to compare.</param>
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/// <returns>True if the object is equal to the packed vector.</returns>
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public override bool Equals(object obj)
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{
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return (obj is Alpha8) && Equals((Alpha8) obj);
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}
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/// <summary>
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/// Compares another Bgra5551 packed vector with the packed vector.
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/// </summary>
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/// <param name="other">The Bgra5551 packed vector to compare.</param>
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/// <returns>True if the packed vectors are equal.</returns>
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public bool Equals(Alpha8 other)
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{
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return packedValue == other.packedValue;
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}
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/// <summary>
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/// Gets a string representation of the packed vector.
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/// </summary>
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/// <returns>A string representation of the packed vector.</returns>
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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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/// <summary>
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/// Gets a hash code of the packed vector.
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/// </summary>
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/// <returns>The hash code for the packed vector.</returns>
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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 static bool operator ==(Alpha8 lhs, Alpha8 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 !=(Alpha8 lhs, Alpha8 rhs)
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{
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return lhs.packedValue != rhs.packedValue;
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}
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#endregion
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#region Private Static Pack Method
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private static byte Pack(float alpha)
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{
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return (byte) System.Math.Round(
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MathHelper.Clamp(alpha, 0, 1) * 255.0f
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);
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}
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#endregion
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}
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}
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