toEcf method

EarthCenteredEarthFixed toEcf(
  1. Planet planet
)

Implementation

EarthCenteredEarthFixed toEcf(Planet planet) {
  final geodetic = this;
  final longitude = geodetic.longitude.radians;
  final latitude = geodetic.latitude.radians;
  final height = geodetic.altitude;
  final radius = planet.radius;
  final f = planet.flattening;

  final e2 = 2 * f - f * f;
  final normal = radius / sqrt(1 - e2 * (sin(latitude) * sin(latitude)));

  final x = (normal + height) * cos(latitude) * cos(longitude);
  final y = (normal + height) * cos(latitude) * sin(longitude);
  final z = (normal * (1 - e2) + height) * sin(latitude);

  return EarthCenteredEarthFixed(x, y, z);
}