node-coord-xyz
let coord = require('coord-xyz');
let p1 = {
x: 385.606,
y: 242.086,
z: -227.376,
};
let p2 = {
x: 337.826,
y: 247.886,
z: -162.018,
};
console.log(coord.xy(p1, p2));
console.log(coord.xy(p1, [p2.x, p2.y, p2.z]));
console.log(coord.toXyz(p2.x, p2.y, p2.z));
console.log(coord.toXyz(0));
console.log(coord.xyz(p1, p2));