Package org.orekit.models.earth.tessellation

Interface TileAiming

All Known Implementing Classes:
AlongTrackAiming, ConstantAzimuthAiming, DivertedSingularityAiming
public interface TileAiming
Interface defining the aiming direction of tiles.
Author:
Luc Maisonobe

  • Method Details

    • getSingularPoints

      List<GeodeticPoint> getSingularPoints()
      Get points at which aiming direction cannot be computed.

      As per Brouwer's hairy ball theorem, any vector field on the 2-sphere has at least one zero. This implies that any implementation of this interface has at least one point where the aiming direction cannot be computed. The most typical example is aiming always towards North pole, for which both poles are singular points.

      Returns:
      a non-empty (as per hairy ball theorem) list of points where aiming direction is either zero or cannot be computed
      Since:
      10.0

    • alongTileDirection

      Vector3D alongTileDirection(Vector3D point, GeodeticPoint gp)
      Find the along tile direction for tessellation at specified point.
      Parameters:
      point - point on the ellipsoid (Cartesian coordinates)
      gp - point on the ellipsoid (geodetic coordinates)
      Returns:
      normalized along tile direction