Function centroidLinePointFirst

docs/app/js/sanddance-app.js:132316–132324

(lambda, phi)

    centroidStream.point = centroidLinePointFirst;
}
function centroidLinePointFirst(lambda, phi) {
    lambda *= (0, _mathJs.radians), phi *= (0, _mathJs.radians);
    var cosPhi = (0, _mathJs.cos)(phi);
    x0 = cosPhi * (0, _mathJs.cos)(lambda);
    y0 = cosPhi * (0, _mathJs.sin)(lambda);
    z0 = (0, _mathJs.sin)(phi);
    centroidStream.point = centroidLinePoint;
    centroidPointCartesian(x0, y0, z0);
}
function centroidLinePoint(lambda, phi) {
    lambda *= (0, _mathJs.radians), phi *= (0, _mathJs.radians);
    var cosPhi = (0, _mathJs.cos)(phi), x = cosPhi * (0, _mathJs.cos)(lambda), y = cosPhi * (0, _mathJs.sin)(lambda), z = (0, _mathJs.sin)(phi), w = (0, _mathJs.atan2)((0, _mathJs.sqrt)((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);