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allow for RotateBy, RotateCw and RotateCcw to accept invalid directions again

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Ell 2021-07-10 06:16:33 +02:00
parent bb189261d7
commit ee2b0b82fe
1 changed files with 14 additions and 4 deletions
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18
MLEM/Misc/Direction2.cs
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@ -194,7 +194,9 @@ namespace MLEM.Misc {
/// <param name="fortyFiveDegrees">Whether to rotate by 45 degrees. If this is false, the rotation is 90 degrees instead.</param>
/// <returns>The rotated direction</returns>
public static Direction2 RotateCw(this Direction2 dir, bool fortyFiveDegrees = false) {
return Clockwise[(ClockwiseLookup[dir] + (fortyFiveDegrees ? 1 : 2)) % Clockwise.Length];
if (!ClockwiseLookup.TryGetValue(dir, out var dirIndex))
return None;
return Clockwise[(dirIndex + (fortyFiveDegrees ? 1 : 2)) % Clockwise.Length];
}
/// <summary>
@ -204,7 +206,9 @@ namespace MLEM.Misc {
/// <param name="fortyFiveDegrees">Whether to rotate by 45 degrees. If this is false, the rotation is 90 degrees instead.</param>
/// <returns>The rotated direction</returns>
public static Direction2 RotateCcw(this Direction2 dir, bool fortyFiveDegrees = false) {
var index = ClockwiseLookup[dir] - (fortyFiveDegrees ? 1 : 2);
if (!ClockwiseLookup.TryGetValue(dir, out var dirIndex))
return None;
var index = dirIndex - (fortyFiveDegrees ? 1 : 2);
return Clockwise[index < 0 ? index + Clockwise.Length : index];
}
@ -244,10 +248,16 @@ namespace MLEM.Misc {
/// <param name="start">The direction to use as the default direction</param>
/// <returns>The direction, rotated by the reference direction</returns>
public static Direction2 RotateBy(this Direction2 dir, Direction2 reference, Direction2 start = Up) {
var diff = ClockwiseLookup[reference] - ClockwiseLookup[start];
if (!ClockwiseLookup.TryGetValue(reference, out var refIndex))
return None;
if (!ClockwiseLookup.TryGetValue(start, out var startIndex))
return None;
if (!ClockwiseLookup.TryGetValue(dir, out var dirIndex))
return None;
var diff = refIndex - startIndex;
if (diff < 0)
diff += Clockwise.Length;
return Clockwise[(ClockwiseLookup[dir] + diff) % Clockwise.Length];
return Clockwise[(dirIndex + diff) % Clockwise.Length];
}
}