import “../math/trigonometry”; import “conic”; import “equirectangular”; import “geo”; import “projection”;
function d3_geo_conicEquidistant(φ0, φ1) {
var cosφ0 = Math.cos(φ0), n = φ0 === φ1 ? Math.sin(φ0) : (cosφ0 - Math.cos(φ1)) / (φ1 - φ0), G = cosφ0 / n + φ0; if (Math.abs(n) < ε) return d3_geo_equirectangular; function forward(λ, φ) { var ρ = G - φ; return [ ρ * Math.sin(n * λ), G - ρ * Math.cos(n * λ) ]; } forward.invert = function(x, y) { var ρ0_y = G - y; return [ Math.atan2(x, ρ0_y) / n, G - d3_sgn(n) * Math.sqrt(x * x + ρ0_y * ρ0_y) ]; }; return forward;
}
(d3.geo.conicEquidistant = function() {
return d3_geo_conic(d3_geo_conicEquidistant);
}).raw = d3_geo_conicEquidistant;