com.nutiteq.geometry

Class DouglasPeuckerGeometrySimplifier

java.lang.Object

com.nutiteq.geometry.GeometrySimplifier

com.nutiteq.geometry.DouglasPeuckerGeometrySimplifier

public class DouglasPeuckerGeometrySimplifier
extends GeometrySimplifier

An implementation of Ramer-Douglas-Peucker algorithm for geometry simplification.
Simplifier works on lines and polygons.
Simplification is done in two passes - first pass uses fast Radial Distance vertex rejection,
second pass uses Ramer-Douglas-Peuckerworst algorithm (with worst case quadratic complexity).

Field Summary

Fields inherited from class com.nutiteq.geometry.GeometrySimplifier

swigCMemOwn

Constructor Summary

Constructors

Constructor and Description
DouglasPeuckerGeometrySimplifier(float tolerance) Constructs a new simplifier, given tolerance.
DouglasPeuckerGeometrySimplifier(long cPtr, boolean cMemoryOwn)

Method Summary

Modifier and Type	Method and Description
void	delete()
protected void	finalize()
static long	getCPtr(DouglasPeuckerGeometrySimplifier obj)
Geometry	simplify(Geometry geometry, float scale) Perform the simplification of the given geometry, given relative scale.
static DouglasPeuckerGeometrySimplifier	swigCreatePolymorphicInstance(long cPtr, boolean cMemoryOwn) Creates a polymorphic instance of the given native object.
java.lang.String	swigGetClassName() Returns the actual class name of this object.
java.lang.Object	swigGetDirectorObject() Returns the connected director object.

Methods inherited from class com.nutiteq.geometry.GeometrySimplifier

equals, getCPtr, hashCode

Methods inherited from class java.lang.Object

clone, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DouglasPeuckerGeometrySimplifier

public DouglasPeuckerGeometrySimplifier(long cPtr,
                                        boolean cMemoryOwn)

DouglasPeuckerGeometrySimplifier

public DouglasPeuckerGeometrySimplifier(float tolerance)

Constructs a new simplifier, given tolerance.

Parameters:

tolerance - The maximum error for simplification. The tolerance value gives maximum error in pixels.

Method Detail

getCPtr

public static long getCPtr(DouglasPeuckerGeometrySimplifier obj)

finalize

protected void finalize()

Overrides:

finalize in class GeometrySimplifier

delete

public void delete()

Overrides:

delete in class GeometrySimplifier

swigCreatePolymorphicInstance

public static DouglasPeuckerGeometrySimplifier swigCreatePolymorphicInstance(long cPtr,
                                                                             boolean cMemoryOwn)

Creates a polymorphic instance of the given native object. This is used internally by the SDK.

simplify

public Geometry simplify(Geometry geometry,
                         float scale)

Description copied from class: GeometrySimplifier

Perform the simplification of the given geometry, given relative scale.

Overrides:

simplify in class GeometrySimplifier

Parameters:

geometry - The geometry to simplify.

scale - Relative scale for simplification, this is proportional to 2^zoom.

Returns:

The simplified geometry. If simplification failed, original geometry may be returned.
Null pointer may be returned if geometry should be discarded.

swigGetClassName

public java.lang.String swigGetClassName()

Returns the actual class name of this object. This is used internally by the SDK.

Overrides:

swigGetClassName in class GeometrySimplifier

Returns:

The class name of this object.

swigGetDirectorObject

public java.lang.Object swigGetDirectorObject()

Returns the connected director object. This is used internally by the SDK.

Overrides:

swigGetDirectorObject in class GeometrySimplifier

Returns:

The connected director object or null if director is not connected.