ilog.views.maps.graphic

Class IlvGeodeticPathComputation

java.lang.Object

ilog.views.maps.graphic.IlvGeodeticPathComputation

public class IlvGeodeticPathComputation
extends Object

IlvGeodeticPathComputation contains methods used to render polygons and polylines while taking into account that the shapes are on the surface of the earth. It is possible to insert the correct interpolated points into each segment, taking into account parameters such as the distance in meters between each intermediary point and the ellipsoid. This class also manages date line wrapping by inserting the necessary interruptions in polygons and polylines that would cause a line to be over half a hemisphere long on the map.

Since:

JViews 7.5

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	IlvGeodeticPathComputation.PointVector Stores an array of points that possibly contains null values for interruptions.

Field Summary

Fields

Modifier and Type	Field and Description
static double	DefaultGeodeticStepSize The default distance for intermediary points.
static double	DefaultMinDistance The default convergence distance for the added points.
static String	TEMP_GRAPHIC_PROPERTY_NAME A temporary property name used to store a computation in an IlvGraphic instance before a data source copies it.

Constructor Summary

Constructors

Constructor and Description
IlvGeodeticPathComputation(IlvCoordinateSystem coordinateSystem) Creates a polygon computation class to manage geodetic objects and date line wrapping.

Method Summary

Modifier and Type	Method and Description
IlvPointArray[]	computeClosedPath(IlvPointArray[] arrays, boolean orthodromy) Creates the correct representation of the raw array of polygons passed as a parameter.
IlvPointArray[]	computeOpenPath(IlvPoint[] points, boolean orthodromy) Creates the correct representation of the raw array of polylines passed as a parameter.
GeneralPath	computePath(GeneralPath path, boolean orthodromy) Creates the correct representation of the raw path passed as a parameter.
IlvGeodeticPathComputation.PointVector	computePath(IlvPoint pathStart, IlvPoint pathEnd, boolean orthodromy) Creates the orthodromy trajectory and adds it to the data.
double	getBearing() Returns the bearing.
double	getDistance() Returns the distance.
double	getStepDistance() Returns the distance for intermediary points.
void	setStepDistance(double stepDistance) Sets the distance for intermediary points.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DefaultGeodeticStepSize

public static double DefaultGeodeticStepSize

The default distance for intermediary points.

DefaultMinDistance

public static double DefaultMinDistance

The default convergence distance for the added points.

TEMP_GRAPHIC_PROPERTY_NAME

public static final String TEMP_GRAPHIC_PROPERTY_NAME

A temporary property name used to store a computation in an IlvGraphic instance before a data source copies it. Using this constant is not recommended. It is mainly for Perforce JViews private use.

Since:

JViews 8.1

See Also:

Constant Field Values

Constructor Detail

IlvGeodeticPathComputation

public IlvGeodeticPathComputation(IlvCoordinateSystem coordinateSystem)

Creates a polygon computation class to manage geodetic objects and date line wrapping.

Parameters:

coordinateSystem - The coordinate system.

Method Detail

getStepDistance

public double getStepDistance()

Returns the distance for intermediary points.

Returns:

The distance for intermediary points.

setStepDistance

public void setStepDistance(double stepDistance)

Sets the distance for intermediary points.

Parameters:

stepDistance - The distance for intermediary points.

computePath

public IlvGeodeticPathComputation.PointVector computePath(IlvPoint pathStart,
                                                          IlvPoint pathEnd,
                                                          boolean orthodromy)

Creates the orthodromy trajectory and adds it to the data.

Parameters:

pathStart - The manager coordinate of point 1.

pathEnd - The manager coordinate of point 2.

orthodromy - Set to true so an intermediary point will be added each step distance to transform the straight line into an orthodromy path.

Returns:

The shape created.

computeClosedPath

public IlvPointArray[] computeClosedPath(IlvPointArray[] arrays,
                                         boolean orthodromy)

Creates the correct representation of the raw array of polygons passed as a parameter.

Parameters:

arrays - An array of polygons.

orthodromy - Set to true to compute the orthodromy between each point.

Returns:

A newly created array of PointArray objects.

computeOpenPath

public IlvPointArray[] computeOpenPath(IlvPoint[] points,
                                       boolean orthodromy)

Creates the correct representation of the raw array of polylines passed as a parameter.

Parameters:

points - The array of polylines.

orthodromy - Set to true to compute the orthodromy between each point.

Returns:

A newly created array of PointArray objects.

computePath

public GeneralPath computePath(GeneralPath path,
                               boolean orthodromy)

Creates the correct representation of the raw path passed as a parameter.

Parameters:

path - The path to represent.

orthodromy - Set to true to compute the orthodromy between each point.

Returns:

A newly created polygon or polyline.

getBearing

public double getBearing()

Returns the bearing.

Returns:

The bearing.

getDistance

public double getDistance()

Returns the distance.

Returns:

The distance.