import “../math/trigonometry”; import “projection”;

function d3_geo_conic(projectAt) {

var φ0 = 0,
    φ1 = π / 3,
    m = d3_geo_projectionMutator(projectAt),
    p = m(φ0, φ1);

p.parallels = function(_) {
  if (!arguments.length) return [φ0 / π * 180, φ1 / π * 180];
  return m(φ0 = _[0] * π / 180, φ1 = _[1] * π / 180);
};

return p;

}