Function orientation_3

stackgl_modules/index.js:34631–34638

(sum, prod, scale, sub)

var ERRBOUND4   = (7.0 + 56.0 * EPSILON) * EPSILON

function orientation_3(sum, prod, scale, sub) {
  return function orientation3Exact(m0, m1, m2) {
    var p = sum(sum(prod(m1[1], m2[0]), prod(-m2[1], m1[0])), sum(prod(m0[1], m1[0]), prod(-m1[1], m0[0])))
    var n = sum(prod(m0[1], m2[0]), prod(-m2[1], m0[0]))
    var d = sub(p, n)
    return d[d.length - 1]
  }
}

function orientation_4(sum, prod, scale, sub) {
  return function orientation4Exact(m0, m1, m2, m3) {