/// <summary>
/// Gets a bounding volume transformed by a matrix.
/// </summary>
/// <param name="m">The matrix.</param>
/// <returns>The transformed volume.</returns>
public FBoxSphereBounds TransformBy(FMatrix m)
{
FBoxSphereBounds result;
FVector vecOrigin = Origin;
FVector vecExtent = BoxExtent;
FVector m0 = m.GetRow(0);
FVector m1 = m.GetRow(1);
FVector m2 = m.GetRow(2);
FVector m3 = m.GetRow(3);
FVector newOrigin = FVector.Replicate(vecOrigin, 0) * m0;
newOrigin += (FVector.Replicate(vecOrigin, 1) * m1);
newOrigin += (FVector.Replicate(vecOrigin, 2) * m2);
newOrigin = newOrigin + m3;
FVector newExtent = (FVector.Replicate(vecExtent, 0) * m0).GetAbs();
newExtent += (FVector.Replicate(vecExtent, 1) * m1).GetAbs();
newExtent += (FVector.Replicate(vecExtent, 2) * m2).GetAbs();
result.BoxExtent = newExtent;
result.Origin = newOrigin;
FVector maxRadius = m0 * m0;
maxRadius += m1 * m1;
maxRadius += m2 * m2;
maxRadius = FVector.ComponentMax(FVector.ComponentMax(maxRadius, FVector.Replicate(maxRadius, 1)), FVector.Replicate(maxRadius, 2));
result.SphereRadius = FMath.Sqrt(maxRadius[0]) * SphereRadius;
// For non-uniform scaling, computing sphere radius from a box results in a smaller sphere.
float boxExtentMagnitude = FMath.Sqrt(FVector.DotProduct(newExtent, newExtent));
result.SphereRadius = FMath.Min(result.SphereRadius, boxExtentMagnitude);
result.DiagnosticCheckNaN();
return(result);
}
