com.nutiteq.datasources.vector

Class SimplifierVectorDataSource

java.lang.Object

com.nutiteq.vectordatasources.AbstractVectorDataSource<com.nutiteq.geometry.Geometry>

com.nutiteq.datasources.vector.SimplifierVectorDataSource

All Implemented Interfaces:

com.nutiteq.vectordatasources.VectorDataSource<com.nutiteq.geometry.Geometry>

public class SimplifierVectorDataSource
extends com.nutiteq.vectordatasources.AbstractVectorDataSource<com.nutiteq.geometry.Geometry>

Data source for simplifying original geometric data. For points, uses simple bucketing algorithm (points are associated with integer coordinates and only one point with unique coordinates is kept). For lines and polygons, Douglas-Peucker algorithm is used for ring simplification.

Nested Class Summary

Nested classes/interfaces inherited from interface com.nutiteq.vectordatasources.VectorDataSource

com.nutiteq.vectordatasources.VectorDataSource.OnChangeListener

Field Summary

Fields

Modifier and Type	Field and Description
static int	DOUGLAS_PEUCKER
static int	VERTEX_SNAP

Fields inherited from class com.nutiteq.vectordatasources.AbstractVectorDataSource

projection

Constructor Summary

Constructors

Constructor and Description
SimplifierVectorDataSource(com.nutiteq.vectordatasources.VectorDataSource<com.nutiteq.geometry.Geometry> dataSource, float tolerance) Default constructor

Method Summary

Methods

Modifier and Type	Method and Description
com.nutiteq.components.Envelope	getDataExtent()
int	getLineSimplificationAlgorithm() Get current line simplification algorithm.
int	getPolygonSimplificationAlgorithm() Get current polygon simplification algorithm.
float	getTolerance() Get current simplification error tolerance value.
Collection<com.nutiteq.geometry.Geometry>	loadElements(com.nutiteq.components.CullState cullState)
void	setLineSimplificationAlgorithm(int algorithm) Set current line simplification algorithm.
void	setPolygonSimplificationAlgorithm(int algorithm) Set current polygon simplification algorithm.
void	setTolerance(float tolerance) Set the current error tolerance value

Methods inherited from class com.nutiteq.vectordatasources.AbstractVectorDataSource

addOnChangeListener, getProjection, notifyElementChanged, notifyElementsChanged, onElementChanged, removeOnChangeListener

Methods inherited from class java.lang.Object

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

Field Detail

DOUGLAS_PEUCKER

public static final int DOUGLAS_PEUCKER

See Also:

Constant Field Values

VERTEX_SNAP

public static final int VERTEX_SNAP

See Also:

Constant Field Values

Constructor Detail

SimplifierVectorDataSource

public SimplifierVectorDataSource(com.nutiteq.vectordatasources.VectorDataSource<com.nutiteq.geometry.Geometry> dataSource,
                          float tolerance)

Default constructor

Parameters:

dataSource - original data source

tolerance - error tolerance parameter for simplification. 0.1f can be used for rough simplification, 0.01f for finer simplification.

Method Detail

getTolerance

public float getTolerance()

Get current simplification error tolerance value.

Returns:

current tolerance value

setTolerance

public void setTolerance(float tolerance)

Set the current error tolerance value

Parameters:

tolerance - new value for error tolerance

getLineSimplificationAlgorithm

public int getLineSimplificationAlgorithm()

Get current line simplification algorithm.

Returns:

current simplification algorithm. Either DOUGLAS_PEUCKER or VERTEX_SNAP.

setLineSimplificationAlgorithm

public void setLineSimplificationAlgorithm(int algorithm)

Set current line simplification algorithm.

Parameters:

algorithm - algorithm to use. Either DOUGLAS_PEUCKER or VERTEX_SNAP. Default is DOUGLAS_PEUCKER.

getPolygonSimplificationAlgorithm

public int getPolygonSimplificationAlgorithm()

Get current polygon simplification algorithm.

Returns:

current simplification algorithm. Either DOUGLAS_PEUCKER or VERTEX_SNAP.

setPolygonSimplificationAlgorithm

public void setPolygonSimplificationAlgorithm(int algorithm)

Set current polygon simplification algorithm.

Parameters:

algorithm - algorithm to use. Either DOUGLAS_PEUCKER or VERTEX_SNAP. Default is VERTEX_SNAP.

getDataExtent

public com.nutiteq.components.Envelope getDataExtent()

loadElements

public Collection<com.nutiteq.geometry.Geometry> loadElements(com.nutiteq.components.CullState cullState)