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improved Direction2 code style

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Ell 2021-07-05 19:49:18 +02:00
parent f352e6b437
commit 8d92131630
1 changed files with 36 additions and 37 deletions
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73
MLEM/Misc/Direction2.cs
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@ -3,6 +3,7 @@ using System.Collections.Generic;
using System.Linq; using System.Linq;
using System.Runtime.Serialization; using System.Runtime.Serialization;
using Microsoft.Xna.Framework; using Microsoft.Xna.Framework;
using static MLEM.Misc.Direction2;
namespace MLEM.Misc { namespace MLEM.Misc {
/// <summary> /// <summary>
@ -83,9 +84,9 @@ namespace MLEM.Misc {
/// <summary> /// <summary>
/// All directions except <see cref="Direction2.None"/> /// All directions except <see cref="Direction2.None"/>
/// </summary> /// </summary>
public static readonly Direction2[] AllExceptNone = All.Where(dir => dir != Direction2.None).ToArray(); public static readonly Direction2[] AllExceptNone = All.Where(dir => dir != None).ToArray();
private static readonly Direction2[] Clockwise = {Direction2.Up, Direction2.UpRight, Direction2.Right, Direction2.DownRight, Direction2.Down, Direction2.DownLeft, Direction2.Left, Direction2.UpLeft}; private static readonly Direction2[] Clockwise = {Up, UpRight, Right, DownRight, Down, DownLeft, Left, UpLeft};
private static readonly Dictionary<Direction2, int> ClockwiseLookup = Clockwise.Select((d, i) => (d, i)).ToDictionary(kv => kv.d, kv => kv.i); private static readonly Dictionary<Direction2, int> ClockwiseLookup = Clockwise.Select((d, i) => (d, i)).ToDictionary(kv => kv.d, kv => kv.i);
/// <summary> /// <summary>
@ -95,7 +96,7 @@ namespace MLEM.Misc {
/// <param name="dir">The direction to query</param> /// <param name="dir">The direction to query</param>
/// <returns>Whether the direction is adjacent</returns> /// <returns>Whether the direction is adjacent</returns>
public static bool IsAdjacent(this Direction2 dir) { public static bool IsAdjacent(this Direction2 dir) {
return dir == Direction2.Up || dir == Direction2.Right || dir == Direction2.Down || dir == Direction2.Left; return dir == Up || dir == Right || dir == Down || dir == Left;
} }
/// <summary> /// <summary>
@ -104,7 +105,7 @@ namespace MLEM.Misc {
/// <param name="dir">The direction to query</param> /// <param name="dir">The direction to query</param>
/// <returns>Whether the direction is diagonal</returns> /// <returns>Whether the direction is diagonal</returns>
public static bool IsDiagonal(this Direction2 dir) { public static bool IsDiagonal(this Direction2 dir) {
return dir == Direction2.UpRight || dir == Direction2.DownRight || dir == Direction2.UpLeft || dir == Direction2.DownLeft; return dir == UpRight || dir == DownRight || dir == UpLeft || dir == DownLeft;
} }
/// <summary> /// <summary>
@ -115,21 +116,21 @@ namespace MLEM.Misc {
/// <returns>The direction's offset</returns> /// <returns>The direction's offset</returns>
public static Point Offset(this Direction2 dir) { public static Point Offset(this Direction2 dir) {
switch (dir) { switch (dir) {
case Direction2.Up: case Up:
return new Point(0, -1); return new Point(0, -1);
case Direction2.Right: case Right:
return new Point(1, 0); return new Point(1, 0);
case Direction2.Down: case Down:
return new Point(0, 1); return new Point(0, 1);
case Direction2.Left: case Left:
return new Point(-1, 0); return new Point(-1, 0);
case Direction2.UpRight: case UpRight:
return new Point(1, -1); return new Point(1, -1);
case Direction2.DownRight: case DownRight:
return new Point(1, 1); return new Point(1, 1);
case Direction2.DownLeft: case DownLeft:
return new Point(-1, 1); return new Point(-1, 1);
case Direction2.UpLeft: case UpLeft:
return new Point(-1, -1); return new Point(-1, -1);
default: default:
return Point.Zero; return Point.Zero;
@ -155,24 +156,24 @@ namespace MLEM.Misc {
/// <returns>The opposite of the direction</returns> /// <returns>The opposite of the direction</returns>
public static Direction2 Opposite(this Direction2 dir) { public static Direction2 Opposite(this Direction2 dir) {
switch (dir) { switch (dir) {
case Direction2.Up: case Up:
return Direction2.Down; return Down;
case Direction2.Right: case Right:
return Direction2.Left; return Left;
case Direction2.Down: case Down:
return Direction2.Up; return Up;
case Direction2.Left: case Left:
return Direction2.Right; return Right;
case Direction2.UpRight: case UpRight:
return Direction2.DownLeft; return DownLeft;
case Direction2.DownRight: case DownRight:
return Direction2.UpLeft; return UpLeft;
case Direction2.DownLeft: case DownLeft:
return Direction2.UpRight; return UpRight;
case Direction2.UpLeft: case UpLeft:
return Direction2.DownRight; return DownRight;
default: default:
return Direction2.None; return None;
} }
} }
@ -204,9 +205,7 @@ namespace MLEM.Misc {
/// <returns>The rotated direction</returns> /// <returns>The rotated direction</returns>
public static Direction2 RotateCcw(this Direction2 dir, bool fortyFiveDegrees = false) { public static Direction2 RotateCcw(this Direction2 dir, bool fortyFiveDegrees = false) {
var index = ClockwiseLookup[dir] - (fortyFiveDegrees ? 1 : 2); var index = ClockwiseLookup[dir] - (fortyFiveDegrees ? 1 : 2);
if (index < 0) return Clockwise[index < 0 ? index + Clockwise.Length : index];
index += Clockwise.Length;
return Clockwise[index % Clockwise.Length];
} }
/// <summary> /// <summary>
@ -220,7 +219,7 @@ namespace MLEM.Misc {
if (Math.Abs(dir.Angle() - offsetAngle) <= MathHelper.PiOver4 / 2) if (Math.Abs(dir.Angle() - offsetAngle) <= MathHelper.PiOver4 / 2)
return dir; return dir;
} }
return Direction2.None; return None;
} }
/// <summary> /// <summary>
@ -231,10 +230,10 @@ namespace MLEM.Misc {
/// <returns>The vector's direction</returns> /// <returns>The vector's direction</returns>
public static Direction2 To90Direction(this Vector2 offset) { public static Direction2 To90Direction(this Vector2 offset) {
if (offset.X == 0 && offset.Y == 0) if (offset.X == 0 && offset.Y == 0)
return Direction2.None; return None;
if (Math.Abs(offset.X) > Math.Abs(offset.Y)) if (Math.Abs(offset.X) > Math.Abs(offset.Y))
return offset.X > 0 ? Direction2.Right : Direction2.Left; return offset.X > 0 ? Right : Left;
return offset.Y > 0 ? Direction2.Down : Direction2.Up; return offset.Y > 0 ? Down : Up;
} }
/// <summary> /// <summary>
@ -244,7 +243,7 @@ namespace MLEM.Misc {
/// <param name="reference">The direction to rotate by</param> /// <param name="reference">The direction to rotate by</param>
/// <param name="start">The direction to use as the default direction</param> /// <param name="start">The direction to use as the default direction</param>
/// <returns>The direction, rotated by the reference direction</returns> /// <returns>The direction, rotated by the reference direction</returns>
public static Direction2 RotateBy(this Direction2 dir, Direction2 reference, Direction2 start = Direction2.Up) { public static Direction2 RotateBy(this Direction2 dir, Direction2 reference, Direction2 start = Up) {
var diff = ClockwiseLookup[reference] - ClockwiseLookup[start]; var diff = ClockwiseLookup[reference] - ClockwiseLookup[start];
if (diff < 0) if (diff < 0)
diff += Clockwise.Length; diff += Clockwise.Length;