Function ratPerp

stackgl_modules/index.js:9270–9272

(a, b)

var rvMuls = __webpack_require__(8987)

function ratPerp (a, b) {
  return ratSub(ratMul(a[0], b[1]), ratMul(a[1], b[0]))
}

// Solve for intersection
//  x = a + t (b-a)