@visx/vendor/vendor-cjs/d3-geo/src/cartesian.js

vendored packages for visx

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.cartesian = cartesian;
exports.cartesianAddInPlace = cartesianAddInPlace;
exports.cartesianCross = cartesianCross;
exports.cartesianDot = cartesianDot;
exports.cartesianNormalizeInPlace = cartesianNormalizeInPlace;
exports.cartesianScale = cartesianScale;
exports.spherical = spherical;
var _math = require("./math.js");
function spherical(cartesian) {
  return [(0, _math.atan2)(cartesian[1], cartesian[0]), (0, _math.asin)(cartesian[2])];
}
function cartesian(spherical) {
  var lambda = spherical[0],
    phi = spherical[1],
    cosPhi = (0, _math.cos)(phi);
  return [cosPhi * (0, _math.cos)(lambda), cosPhi * (0, _math.sin)(lambda), (0, _math.sin)(phi)];
}
function cartesianDot(a, b) {
  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
}
function cartesianCross(a, b) {
  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
}

// TODO return a
function cartesianAddInPlace(a, b) {
  a[0] += b[0], a[1] += b[1], a[2] += b[2];
}
function cartesianScale(vector, k) {
  return [vector[0] * k, vector[1] * k, vector[2] * k];
}

// TODO return d
function cartesianNormalizeInPlace(d) {
  var l = (0, _math.sqrt)(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
  d[0] /= l, d[1] /= l, d[2] /= l;
}