// The smaller of the two possible angles between the two vectors is returned, therefore the result will never be greater than 180 degrees or smaller than -180 degrees.
// If you imagine the from and to vectors as lines on a piece of paper, both originating from the same point, then the /axis/ vector would point up out of the paper.
// The measured angle between the two vectors would be positive in a clockwise direction and negative in an anti-clockwise direction.
public static FP SignedAngle(TSVector from, TSVector to, TSVector axis)
{
TSVector fromNorm = from.normalized, toNorm = to.normalized;
FP unsignedAngle = TSMath.Acos(TSMath.Clamp(Dot(fromNorm, toNorm), -FP.ONE, FP.ONE)) * TSMath.Rad2Deg;
FP sign = TSMath.Sign(Dot(axis, Cross(fromNorm, toNorm)));
return(unsignedAngle * sign);
}
