cross() function exists in OpenSCAD core language

[clothbot]

Hi Oskar,

I don't remember when exactly cross() was added into OpenSCAD - it's been several years since my initial add of linear algebra support and Marius' full re-write - but it makes this (re)definition obsolete:

scad-utils/linalg.scad

Line 3 in 484d39b

function cross(x,y) = [x[1]*y[2]-x[2]*y[1], x[2]*y[0]-x[0]*y[2], x[0]*y[1]-x[1]*y[0]];

See docs: https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/The_OpenSCAD_Language#cross

Andrew.