Slide and drag mouse. WARNING: Cross product is represented by magenta. It can extend very long very easily, and the computer may or may not display it correctly.
In linear algebra in vectors, cross product is defined by a x b, where a=(xa, ya, za) and b=(xb, yb, zb), and a x b = (ya*zb-yb*za, xb*za-xa*zb, xa*yb-xb*ya) (from Khan Academy) The cross product is used in quaternions, a 4D extension of complex numbers, which can be treated as a scalar and a 3D vector, used in rotations.
