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