node-red-contrib-tak-registration/node_modules/d3-geo/src/projection/orthographic.js

A Node-RED node to register to TAK and to help wrap files as datapackages to send to TAK

import {asin, cos, epsilon, sin} from "../math";
import {azimuthalInvert} from "./azimuthal";
import projection from "./index";

export function orthographicRaw(x, y) {
  return [cos(y) * sin(x), sin(y)];
}

orthographicRaw.invert = azimuthalInvert(asin);

export default function() {
  return projection(orthographicRaw)
      .scale(249.5)
      .clipAngle(90 + epsilon);
}