Sha256: 209e69bef2955fcf1fa7fa2632e39208700593d2d22adc45823400b6bc063eaf
Contents?: true
Size: 800 Bytes
Versions: 4
Compression:
Stored size: 800 Bytes
Contents
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;
Version data entries
4 entries across 4 versions & 2 rubygems