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added direction rotation methods

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Ellpeck 2020-02-27 19:15:02 +01:00
parent 9f870738b0
commit d0370e583e
1 changed files with 46 additions and 0 deletions
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46
MLEM/Misc/Direction2.cs
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@ -92,5 +92,51 @@ namespace MLEM.Misc {
return (float) Math.Atan2(offset.Y, offset.X); return (float) Math.Atan2(offset.Y, offset.X);
} }
public static Direction2 RotateCw(this Direction2 dir, bool fortyFiveDegrees = false) {
switch (dir) {
case Direction2.Up:
return fortyFiveDegrees ? Direction2.UpRight : Direction2.Right;
case Direction2.Right:
return fortyFiveDegrees ? Direction2.DownRight : Direction2.Down;
case Direction2.Down:
return fortyFiveDegrees ? Direction2.DownLeft : Direction2.Left;
case Direction2.Left:
return fortyFiveDegrees ? Direction2.UpLeft : Direction2.Up;
case Direction2.UpRight:
return fortyFiveDegrees ? Direction2.Right : Direction2.DownRight;
case Direction2.DownRight:
return fortyFiveDegrees ? Direction2.Down : Direction2.DownLeft;
case Direction2.DownLeft:
return fortyFiveDegrees ? Direction2.Left : Direction2.UpLeft;
case Direction2.UpLeft:
return fortyFiveDegrees ? Direction2.Up : Direction2.UpRight;
default:
return Direction2.None;
}
}
public static Direction2 RotateCcw(this Direction2 dir, bool fortyFiveDegrees = false) {
switch (dir) {
case Direction2.Up:
return fortyFiveDegrees ? Direction2.UpLeft : Direction2.Left;
case Direction2.Right:
return fortyFiveDegrees ? Direction2.UpRight : Direction2.Up;
case Direction2.Down:
return fortyFiveDegrees ? Direction2.DownRight : Direction2.Right;
case Direction2.Left:
return fortyFiveDegrees ? Direction2.DownLeft : Direction2.Down;
case Direction2.UpRight:
return fortyFiveDegrees ? Direction2.Up : Direction2.UpLeft;
case Direction2.DownRight:
return fortyFiveDegrees ? Direction2.Right : Direction2.UpRight;
case Direction2.DownLeft:
return fortyFiveDegrees ? Direction2.Down : Direction2.DownRight;
case Direction2.UpLeft:
return fortyFiveDegrees ? Direction2.Left : Direction2.DownLeft;
default:
return Direction2.None;
}
}
} }
} }