public Vector3f cross(Vector3f v) {
        return cross(v, null);
    }
Calculates a cross product with the argument and returns the product as a
new instance. The current instance is unaffected.

@param v the right factor (not null, unaffected)
@return {@code this} cross {@code v} (a new Vector3f)
jme3-core/src/main/java/com/jme3/math/Vector3f.java