org.h2gis.utilities.jts_utils

Class CoordinateUtils

java.lang.Object

org.h2gis.utilities.jts_utils.CoordinateUtils

public final class CoordinateUtils
extends Object

Useful methods for JTS Coordinates.

Author:

Erwan Bocher

Method Summary

Modifier and Type	Method and Description
static boolean	contains2D(com.vividsolutions.jts.geom.Coordinate[] coords, com.vividsolutions.jts.geom.Coordinate coord) Checks if a coordinate array contains a specific coordinate.
static double	interpolate(com.vividsolutions.jts.geom.Coordinate firstCoordinate, com.vividsolutions.jts.geom.Coordinate lastCoordinate, com.vividsolutions.jts.geom.Coordinate toBeInterpolated) Interpolates a z value (linearly) between the two coordinates.
static com.vividsolutions.jts.geom.Coordinate[]	removeDuplicatedCoordinates(com.vividsolutions.jts.geom.Coordinate[] coords, boolean closeRing) Remove dupliacted coordinates Note : This method doesn't preserve the topology of geometry
static com.vividsolutions.jts.geom.Coordinate[]	removeRepeatedCoordinates(com.vividsolutions.jts.geom.Coordinate[] coords, double tolerance, boolean duplicateFirstLast) Remove repeated coordinates according a given tolerance
static com.vividsolutions.jts.geom.Coordinate	vectorIntersection(com.vividsolutions.jts.geom.Coordinate p1, com.vividsolutions.jts.math.Vector3D v1, com.vividsolutions.jts.geom.Coordinate p2, com.vividsolutions.jts.math.Vector3D v2) Compute intersection point of two vectors
static double[]	zMinMax(com.vividsolutions.jts.geom.Coordinate[] cs) Determine the min and max "z" values in an array of Coordinates.

Methods inherited from class java.lang.Object

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

Method Detail

zMinMax

public static double[] zMinMax(com.vividsolutions.jts.geom.Coordinate[] cs)

Determine the min and max "z" values in an array of Coordinates.

Parameters:

cs - The array to search.

Returns:

An array of size 2, index 0 is min, index 1 is max.

interpolate

public static double interpolate(com.vividsolutions.jts.geom.Coordinate firstCoordinate,
                                 com.vividsolutions.jts.geom.Coordinate lastCoordinate,
                                 com.vividsolutions.jts.geom.Coordinate toBeInterpolated)

Interpolates a z value (linearly) between the two coordinates.

Parameters:

firstCoordinate -

lastCoordinate -

toBeInterpolated -

Returns:

contains2D

public static boolean contains2D(com.vividsolutions.jts.geom.Coordinate[] coords,
                                 com.vividsolutions.jts.geom.Coordinate coord)

Checks if a coordinate array contains a specific coordinate. The equality is done only in 2D (z values are not checked).

Parameters:

coords -

coord -

Returns:

vectorIntersection

public static com.vividsolutions.jts.geom.Coordinate vectorIntersection(com.vividsolutions.jts.geom.Coordinate p1,
                                                                        com.vividsolutions.jts.math.Vector3D v1,
                                                                        com.vividsolutions.jts.geom.Coordinate p2,
                                                                        com.vividsolutions.jts.math.Vector3D v2)

Compute intersection point of two vectors

Parameters:

p1 - Origin point

v1 - Direction from p1

p2 - Origin point 2

v2 - Direction of p2

Returns:

Null if vectors are collinear or if intersection is done behind one of origin point

removeDuplicatedCoordinates

public static com.vividsolutions.jts.geom.Coordinate[] removeDuplicatedCoordinates(com.vividsolutions.jts.geom.Coordinate[] coords,
                                                                                   boolean closeRing)

Remove dupliacted coordinates Note : This method doesn't preserve the topology of geometry

Parameters:

coords - the input coordinates

closeRing - is true the first coordinate is added at the end to close the array

Returns:

removeRepeatedCoordinates

public static com.vividsolutions.jts.geom.Coordinate[] removeRepeatedCoordinates(com.vividsolutions.jts.geom.Coordinate[] coords,
                                                                                 double tolerance,
                                                                                 boolean duplicateFirstLast)

Remove repeated coordinates according a given tolerance

Parameters:

coords - the input coordinates

tolerance - to delete the coordinates

duplicateFirstLast - false to delete the last coordinate if there are equals

Returns: