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import {asin, atan2, cos, sin, sqrt} from "../math.js";
export function azimuthalRaw(scale) {
return function(x, y) {
var cx = cos(x),
cy = cos(y),
k = scale(cx * cy);
if (k === Infinity) return [2, 0];
return [
k * cy * sin(x),
k * sin(y)
];
}
}
export function azimuthalInvert(angle) {
return function(x, y) {
var z = sqrt(x * x + y * y),
c = angle(z),
sc = sin(c),
cc = cos(c);
return [
atan2(x * sc, z * cc),
asin(z && y * sc / z)
];
}
}