File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
import {asin, atan2, cos, sin, sqrt, tan} from "./math.js";
import parallel1 from "./parallel1.js";
export function craigRaw(phi0) {
var tanPhi0 = tan(phi0);
function forward(lambda, phi) {
return [lambda, (lambda ? lambda / sin(lambda) : 1) * (sin(phi) * cos(lambda) - tanPhi0 * cos(phi))];
}
forward.invert = tanPhi0 ? function(x, y) {
if (x) y *= sin(x) / x;
var cosLambda = cos(x);
return [x, 2 * atan2(sqrt(cosLambda * cosLambda + tanPhi0 * tanPhi0 - y * y) - cosLambda, tanPhi0 - y)];
} : function(x, y) {
return [x, asin(x ? y * tan(x) / x : y)];
};
return forward;
}
export default function() {
return parallel1(craigRaw)
.scale(249.828)
.clipAngle(90);
}