Class PythonTileAiming
- java.lang.Object
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- org.orekit.models.earth.tessellation.PythonTileAiming
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- All Implemented Interfaces:
TileAiming
public class PythonTileAiming extends Object implements TileAiming
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Constructor Summary
Constructors Constructor Description PythonTileAiming()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Vector3D
alongTileDirection(Vector3D point, GeodeticPoint gp)
Find the along tile direction for tessellation at specified point.void
finalize()
Part of JCC Python interface to objectList<GeodeticPoint>
getSingularPoints()
Get points at which aiming direction cannot be computed.void
pythonDecRef()
Part of JCC Python interface to objectlong
pythonExtension()
Part of JCC Python interface to objectvoid
pythonExtension(long pythonObject)
Part of JCC Python interface to object
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Method Detail
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pythonExtension
public void pythonExtension(long pythonObject)
Part of JCC Python interface to object
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pythonExtension
public long pythonExtension()
Part of JCC Python interface to object
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finalize
public void finalize() throws Throwable
Part of JCC Python interface to object
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pythonDecRef
public void pythonDecRef()
Part of JCC Python interface to object
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getSingularPoints
public 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.
- Specified by:
getSingularPoints
in interfaceTileAiming
- 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
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alongTileDirection
public Vector3D alongTileDirection(Vector3D point, GeodeticPoint gp)
Find the along tile direction for tessellation at specified point.- Specified by:
alongTileDirection
in interfaceTileAiming
- Parameters:
point
- point on the ellipsoid (Cartesian coordinates)gp
- point on the ellipsoid (geodetic coordinates)- Returns:
- normalized along tile direction
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