Function circleRadius

external/.d3.js:10451–10456

(cosRadius, point)

// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
function circleRadius(cosRadius, point) {
  point = cartesian(point), point[0] -= cosRadius;
  cartesianNormalizeInPlace(point);
  var radius = acos$1(-point[1]);
  return ((-point[2] < 0 ? -radius : radius) + tau$1 - epsilon$1) % tau$1;
}

function circle$1() {
  var center = constant$3([0, 0]),