• Timo Koch's avatar
    [math] (Re-)implement cross product in 2d/3d · 979452c1
    Timo Koch authored
    This makes the old cross-product more efficient. The old version
    initialized a FieldVector with zeros and then filled it. The
    new version builds it's directly using consise bracket notation.
    The result can be moved without creating a copy.
    
    Implement a cross product in 2d that returns a scalar.
    Not mathematically clean but still useful.
    
    2d and 3d cross products now explicitly only work in 2d and 3d.
    Other dimensions will trigger a compiler error.
    979452c1