TileAiming (OREKIT 12.1.2 API)

All Known Implementing Classes:

AlongTrackAiming, ConstantAzimuthAiming, DivertedSingularityAiming
```
public interface TileAiming
```
Interface defining the aiming direction of tiles.

Author:

Luc Maisonobe

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Vector3D`	`alongTileDirection(Vector3D point, GeodeticPoint gp)`	Find the along tile direction for tessellation at specified point.
`List<GeodeticPoint>`	`getSingularPoints()`	Get points at which aiming direction cannot be computed.

- Method Detail
  - 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