mirror of
https://github.com/Ryujinx/Opentk.git
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220 lines
7.7 KiB
C#
220 lines
7.7 KiB
C#
#region --- License ---
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// Copyright (c) Open Toolkit library.
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// This file is subject to the terms and conditions defined in
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// file 'License.txt', which is part of this source code package.
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#endregion
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using System;
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using System.Runtime.InteropServices;
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namespace OpenTK
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{
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/// <summary>
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/// Defines a 2d box (rectangle).
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/// </summary>
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[StructLayout(LayoutKind.Sequential)]
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public struct Box2 : IEquatable<Box2>
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{
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/// <summary>
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/// The left boundary of the structure.
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/// </summary>
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public float Left;
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/// <summary>
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/// The right boundary of the structure.
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/// </summary>
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public float Right;
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/// <summary>
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/// The top boundary of the structure.
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/// </summary>
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public float Top;
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/// <summary>
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/// The bottom boundary of the structure.
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/// </summary>
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public float Bottom;
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/// <summary>
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/// Constructs a new Box2 with the specified dimensions.
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/// </summary>
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/// <param name="topLeft">An OpenTK.Vector2 describing the top-left corner of the Box2.</param>
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/// <param name="bottomRight">An OpenTK.Vector2 describing the bottom-right corner of the Box2.</param>
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public Box2(Vector2 topLeft, Vector2 bottomRight)
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{
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Left = topLeft.X;
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Top = topLeft.Y;
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Right = bottomRight.X;
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Bottom = bottomRight.Y;
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}
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/// <summary>
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/// Constructs a new Box2 with the specified dimensions.
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/// </summary>
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/// <param name="left">The position of the left boundary.</param>
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/// <param name="top">The position of the top boundary.</param>
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/// <param name="right">The position of the right boundary.</param>
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/// <param name="bottom">The position of the bottom boundary.</param>
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public Box2(float left, float top, float right, float bottom)
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{
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Left = left;
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Top = top;
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Right = right;
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Bottom = bottom;
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}
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/// <summary>
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/// Creates a new Box2 with the specified dimensions.
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/// </summary>
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/// <param name="top">The position of the top boundary.</param>
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/// <param name="left">The position of the left boundary.</param>
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/// <param name="right">The position of the right boundary.</param>
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/// <param name="bottom">The position of the bottom boundary.</param>
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/// <returns>A new OpenTK.Box2 with the specfied dimensions.</returns>
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public static Box2 FromTLRB(float top, float left, float right, float bottom)
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{
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return new Box2(left, top, right, bottom);
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}
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/// <summary>
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/// Creates a new Box2 with the specified dimensions.
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/// </summary>
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/// <param name="top">The position of the top boundary.</param>
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/// <param name="left">The position of the left boundary.</param>
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/// <param name="width">The width of the box.</param>
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/// <param name="height">The height of the box.</param>
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/// <returns>A new OpenTK.Box2 with the specfied dimensions.</returns>
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public static Box2 FromDimensions(float left, float top, float width, float height)
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{
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return new Box2(left, top, left + width, top + height);
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}
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/// <summary>
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/// Creates a new Box2 with the specified dimensions.
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/// </summary>
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/// <param name="position">The position of the top left corner.</param>
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/// <param name="size">The size of the box.</param>
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/// <returns>A new OpenTK.Box2 with the specfied dimensions.</returns>
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public static Box2 FromDimensions(Vector2 position, Vector2 size)
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{
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return FromDimensions(position.X, position.Y, size.X, size.Y);
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}
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/// <summary>
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/// Gets a float describing the width of the Box2 structure.
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/// </summary>
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public float Width { get { return (float)System.Math.Abs(Right - Left); } }
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/// <summary>
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/// Gets a float describing the height of the Box2 structure.
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/// </summary>
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public float Height { get { return (float)System.Math.Abs(Bottom - Top); } }
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/// <summary>
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/// Returns whether the box contains the specified point on the closed region described by this Box2.
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/// </summary>
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/// <param name="point">The point to query.</param>
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/// <returns>Whether this box contains the point.</returns>
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public bool Contains(Vector2 point)
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{
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return Contains(point, true);
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}
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/// <summary>
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/// Returns whether the box contains the specified point.
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/// </summary>
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/// <param name="point">The point to query.</param>
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/// <param name="closedRegion">Whether to include the box boundary in the test region.</param>
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/// <returns>Whether this box contains the point.</returns>
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public bool Contains(Vector2 point, bool closedRegion)
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{
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bool xOK = (closedRegion == Left <= Right) ?
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(point.X >= Left != point.X > Right) :
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(point.X > Left != point.X >= Right);
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bool yOK = (closedRegion == Top <= Bottom) ?
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(point.Y >= Top != point.Y > Bottom) :
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(point.Y > Top != point.Y >= Bottom);
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return xOK && yOK;
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}
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/// <summary>
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/// Returns a Box2 translated by the given amount.
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/// </summary>
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public Box2 Translated(Vector2 point)
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{
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return new Box2(Left + point.X, Top + point.Y, Right + point.X, Bottom + point.Y);
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}
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/// <summary>
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/// Translates this Box2 by the given amount.
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/// </summary>
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public void Translate(Vector2 point)
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{
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Left += point.X;
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Right += point.X;
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Top += point.Y;
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Bottom += point.Y;
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}
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/// <summary>
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/// Equality comparator.
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/// </summary>
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public static bool operator ==(Box2 left, Box2 right)
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{
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return left.Bottom == right.Bottom && left.Top == right.Top &&
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left.Left == right.Left && left.Right == right.Right;
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}
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/// <summary>
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/// Inequality comparator.
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/// </summary>
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public static bool operator !=(Box2 left, Box2 right)
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{
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return !(left == right);
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}
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/// <summary>
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/// Functional equality comparator.
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/// </summary>
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public bool Equals(Box2 other)
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{
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return this == other;
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}
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/// <summary>
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/// Implements Object.Equals.
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/// </summary>
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public override bool Equals(object obj)
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{
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return obj is Box2 && Equals((Box2) obj);
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}
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///// <summary>
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///// Gets the hash code for this Box2.
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///// </summary>
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public override int GetHashCode()
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{
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unchecked
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{
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var hashCode = this.Left.GetHashCode();
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hashCode = (hashCode * 397) ^ this.Right.GetHashCode();
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hashCode = (hashCode * 397) ^ this.Top.GetHashCode();
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hashCode = (hashCode * 397) ^ this.Bottom.GetHashCode();
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return hashCode;
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}
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}
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private static string listSeparator = System.Globalization.CultureInfo.CurrentCulture.TextInfo.ListSeparator;
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/// <summary>
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/// Returns a <see cref="System.String"/> describing the current instance.
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/// </summary>
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/// <returns></returns>
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public override string ToString()
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{
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return String.Format("({0}{4} {1}) - ({2}{4} {3})", Left, Top, Right, Bottom, listSeparator);
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}
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}
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}
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