/// <summary>Transform a Normal by the given Matrix</summary>
/// <remarks>
/// This calculates the inverse of the given matrix, use TransformNormalInverse if you
/// already have the inverse to avoid this extra calculation
/// </remarks>
/// <param name="norm">The normal to transform</param>
/// <param name="mat">The desired transformation</param>
/// <returns>The transformed normal</returns>
public static Vector3d TransformNormal(Vector3d norm, Matrix4d mat)
{
mat.Invert();
return(TransformNormalInverse(norm, mat));
}
/// <summary>Transform a Normal by the given Matrix</summary>
/// <remarks>
/// This calculates the inverse of the given matrix, use TransformNormalInverse if you
/// already have the inverse to avoid this extra calculation
/// </remarks>
/// <param name="norm">The normal to transform</param>
/// <param name="mat">The desired transformation</param>
/// <param name="result">The transformed normal</param>
public static void TransformNormal(ref Vector3d norm, ref Matrix4d mat, out Vector3d result)
{
Matrix4d Inverse = Matrix4d.Invert(mat);
Vector3d.TransformNormalInverse(ref norm, ref Inverse, out result);
}