Class SkyEllipseCoordSet
java.lang.Object
uk.ac.starlink.ttools.plot2.layer.SkyEllipseCoordSet
- All Implemented Interfaces:
MultiPointCoordSet
,SkyMultiPointCoordSet
MultiPointCoordSet for ellipses on a sphere.
- Since:
- 18 Feb 2013
- Author:
- Mark Taylor
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic MultiPointForm
Creates a MultiPointForm that can plot ellipses on the sky, corresponding to this coordset.Coord[]
Returns the coordinate definitions.int
Returns the number of (non-central) data positions defined by this coord set.boolean
readPoints
(Tuple tuple, int icol, double[] xyz0, double unitInDegrees, SkyDataGeom geom, double[][] xyzExtras) Reads the non-central points from a appropriate span of columns in a supplied tuple.double
Returns the characteristic size of the multi-point structure represented by a supplied tuple.
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Constructor Details
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SkyEllipseCoordSet
public SkyEllipseCoordSet()Constructor.
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Method Details
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getCoords
Description copied from interface:MultiPointCoordSet
Returns the coordinate definitions.- Specified by:
getCoords
in interfaceMultiPointCoordSet
- Returns:
- coords
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getPointCount
public int getPointCount()Description copied from interface:MultiPointCoordSet
Returns the number of (non-central) data positions defined by this coord set.- Specified by:
getPointCount
in interfaceMultiPointCoordSet
- Returns:
- data position count
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readSize
Description copied from interface:SkyMultiPointCoordSet
Returns the characteristic size of the multi-point structure represented by a supplied tuple. The returned value is a measure of linear extent on the tangent plane of the multi-point data contained in the tuple, in the same units as the size-defining parts of the input.- Specified by:
readSize
in interfaceSkyMultiPointCoordSet
- Parameters:
tuple
- tupleicol
- index of tuple field corresponding to the first of the coordinates in this setxyz0
- nDataDim-element array giving central data position- Returns:
- linear extent of multi-point shape on the tangent plane
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readPoints
public boolean readPoints(Tuple tuple, int icol, double[] xyz0, double unitInDegrees, SkyDataGeom geom, double[][] xyzExtras) Description copied from interface:SkyMultiPointCoordSet
Reads the non-central points from a appropriate span of columns in a supplied tuple.The central data position must be supplied as input. The
icExtra
value gives the column corresponding to the first coord of this coordinate set in the sequence; the following few columns are assumed to correspond 1:1 to the coords in this coord set.- Specified by:
readPoints
in interfaceSkyMultiPointCoordSet
- Parameters:
tuple
- tupleicol
- index of tuple field corresponding to the first of the coordinates in this setxyz0
- nDataDim-element array giving central data positionunitInDegrees
- unit in degrees of the size-defining tuple valuesgeom
- converter between tuple values and data space coordinatesxyzExtras
- [nPointCount][nDataDim]-shaped array into which the non-central data positions will be written- Returns:
- true iff the conversion was successful
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createForm
Creates a MultiPointForm that can plot ellipses on the sky, corresponding to this coordset.- Returns:
- new form
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