程序包 org.meteoinfo.geoprocess

类 GeometryUtil

java.lang.Object

org.meteoinfo.geoprocess.GeometryUtil

public class GeometryUtil
extends java.lang.Object

作者:

wyq

构造器概要

构造器

构造器	说明
GeometryUtil()

方法概要

修饰符和类型	方法	说明
static PolygonShape	convexHull(Array x, Array y)	Computes the smallest convex Polygon that contains all the points
static java.util.List<PointD>	getEllipseCoordinates(double x0, double y0, double a, double b)	Get ellipse coordinates
static java.util.List<PointD>	getEllipseCoordinates(double x0, double y0, double a, double b, double deltaAngle)	Get ellipse coordinates
static PointD	getEllipseXY(double x0, double y0, double a, double b, double angle)	Get ellipse coordinate
static Array	inPolygon(Array a, java.util.List<java.lang.Number> x, java.util.List<java.lang.Number> y, java.util.List<java.lang.Number> x_p, java.util.List<java.lang.Number> y_p)	In polygon function
static Array	inPolygon(Array a, java.util.List<java.lang.Number> x, java.util.List<java.lang.Number> y, java.util.List<PolygonShape> polygons)	In polygon function
static Array	inPolygon(Array a, java.util.List<java.lang.Number> x, java.util.List<java.lang.Number> y, VectorLayer layer)	In polygon function
static Array	inPolygon(Array a, java.util.List<java.lang.Number> x, java.util.List<java.lang.Number> y, PolygonShape ps)	In polygon function
static Array	inPolygon(Array x, Array y, java.util.List<PolygonShape> polygons)	In polygon function
static Array	inPolygon(Array x, Array y, Array x_p, Array y_p)	In polygon function
static boolean	isConvex(java.util.List<? extends PointD> points)	Check if a polygon is convex
static boolean	isConvex(Polygon polygon)	Check if a polygon is convex
static Array	maskin(Array a, Array m)	Maskin function
static Array	maskin(Array a, Array x, Array y, java.util.List<PolygonShape> polygons)	Maskin function
static Array[]	maskin_Remove(Array a, Array x, Array y, java.util.List<PolygonShape> polygons)	Maskin function
static Array	maskout(Array a, java.util.List<java.lang.Number> x, java.util.List<java.lang.Number> y, java.util.List<PolygonShape> polygons)	Maskout function
static Array	maskout(Array a, java.util.List<java.lang.Number> x, java.util.List<java.lang.Number> y, java.util.List<PolygonShape> polygons, java.lang.Number missingValue)	Maskout function
static Array	maskout(Array a, java.util.List<java.lang.Number> x, java.util.List<java.lang.Number> y, VectorLayer layer, java.lang.Number missingValue)	Maskout function
static Array	maskout(Array a, java.util.List<java.lang.Number> x, java.util.List<java.lang.Number> y, PolygonShape polygon, java.lang.Number missingValue)	Maskout function
static Array	maskout(Array a, Array m)	Maskout function
static Array	maskout(Array a, Array m, java.lang.Number missingValue)	Maskout function
static Array	maskout(Array a, Array x, Array y, java.util.List<PolygonShape> polygons)	Maskout function
static Array[]	maskout_Remove(Array a, Array x, Array y, java.util.List<PolygonShape> polygons)	Maskout function

从类继承的方法 java.lang.Object

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

构造器详细资料

GeometryUtil

public GeometryUtil()

方法详细资料

getEllipseXY

public static PointD getEllipseXY(double x0,
                                  double y0,
                                  double a,
                                  double b,
                                  double angle)

Get ellipse coordinate

参数:

x0 - Center x

y0 - Center y

a - Major axis

b - Minor axis

angle - Angle

返回:

Coordinate on the ellipse

getEllipseCoordinates

public static java.util.List<PointD> getEllipseCoordinates(double x0,
                                                           double y0,
                                                           double a,
                                                           double b,
                                                           double deltaAngle)

Get ellipse coordinates

参数:

x0 - Center x

y0 - Center y

a - Major axis

b - Minor axis

deltaAngle - Delta angle

返回:

Coordinate on the ellipse

getEllipseCoordinates

public static java.util.List<PointD> getEllipseCoordinates(double x0,
                                                           double y0,
                                                           double a,
                                                           double b)

Get ellipse coordinates

参数:

x0 - Center x

y0 - Center y

a - Major axis

b - Minor axis

返回:

Coordinate on the ellipse

convexHull

public static PolygonShape convexHull(Array x,
                                      Array y)

Computes the smallest convex Polygon that contains all the points

参数:

x - X array

y - Y array

返回:

PolygonShape

inPolygon

public static Array inPolygon(Array a,
                              java.util.List<java.lang.Number> x,
                              java.util.List<java.lang.Number> y,
                              VectorLayer layer)

In polygon function

参数:

a - Array a

x - X dimension values

y - Y dimension values

layer - Polygon vector layer

返回:

Result array with cell values of 1 inside polygons and -1 outside polygons

inPolygon

public static Array inPolygon(Array a,
                              java.util.List<java.lang.Number> x,
                              java.util.List<java.lang.Number> y,
                              PolygonShape ps)

In polygon function

参数:

a - Array a

x - X dimension values

y - Y dimension values

ps - Polygon shape

返回:

Result array with cell values of 1 inside polygons and -1 outside polygons

inPolygon

public static Array inPolygon(Array a,
                              java.util.List<java.lang.Number> x,
                              java.util.List<java.lang.Number> y,
                              java.util.List<PolygonShape> polygons)

In polygon function

参数:

a - Array a

x - X dimension values

y - Y dimension values

polygons - PolygonShape list

返回:

Result array with cell values of 1 inside polygons and -1 outside polygons

inPolygon

public static Array inPolygon(Array x,
                              Array y,
                              java.util.List<PolygonShape> polygons)

In polygon function

参数:

x - X coordinates

y - Y coordinates

polygons - PolygonShape list

返回:

Result boolean array

inPolygon

public static Array inPolygon(Array a,
                              java.util.List<java.lang.Number> x,
                              java.util.List<java.lang.Number> y,
                              java.util.List<java.lang.Number> x_p,
                              java.util.List<java.lang.Number> y_p)

In polygon function

参数:

a - Array a

x - X dimension values

y - Y dimension values

x_p - X coordinate of the polygon

y_p - Y coordinate of the polygon

返回:

Result array with cell values of 1 inside polygons and -1 outside polygons

inPolygon

public static Array inPolygon(Array x,
                              Array y,
                              Array x_p,
                              Array y_p)

In polygon function

参数:

x - X coordinates

y - Y coordinates

x_p - X coordinate of the polygon

y_p - Y coordinate of the polygon

返回:

Result boolean array

maskout

public static Array maskout(Array a,
                            java.util.List<java.lang.Number> x,
                            java.util.List<java.lang.Number> y,
                            VectorLayer layer,
                            java.lang.Number missingValue)

Maskout function

参数:

a - Array a

x - X dimension values

y - Y dimension values

layer - VectorLayer

missingValue - Missing value

返回:

Result array with cell values of missing outside polygons

maskout

public static Array maskout(Array a,
                            java.util.List<java.lang.Number> x,
                            java.util.List<java.lang.Number> y,
                            PolygonShape polygon,
                            java.lang.Number missingValue)

Maskout function

参数:

a - Array a

x - X dimension values

y - Y dimension values

polygon - Polygon shape

missingValue - Missing value

返回:

Result array with cell values of missing outside polygons

maskout

public static Array maskout(Array a,
                            Array x,
                            Array y,
                            java.util.List<PolygonShape> polygons)

Maskout function

参数:

a - Array a

x - X Array

y - Y Array

polygons - Polygons for maskout

返回:

Result array with cell values of missing outside polygons

maskin

public static Array maskin(Array a,
                           Array x,
                           Array y,
                           java.util.List<PolygonShape> polygons)

Maskin function

参数:

a - Array a

x - X Array

y - Y Array

polygons - Polygons for maskin

返回:

Result array with cell values of missing inside polygons

maskout_Remove

public static Array[] maskout_Remove(Array a,
                                     Array x,
                                     Array y,
                                     java.util.List<PolygonShape> polygons)

Maskout function

参数:

a - Array a

x - X Array

y - Y Array

polygons - Polygons for maskout

返回:

Result arrays removing cells outside polygons

maskin_Remove

public static Array[] maskin_Remove(Array a,
                                    Array x,
                                    Array y,
                                    java.util.List<PolygonShape> polygons)

Maskin function

参数:

a - Array a

x - X Array

y - Y Array

polygons - Polygons for maskin

返回:

Result arrays removing cells inside polygons

maskout

public static Array maskout(Array a,
                            java.util.List<java.lang.Number> x,
                            java.util.List<java.lang.Number> y,
                            java.util.List<PolygonShape> polygons)

Maskout function

参数:

a - Array a

x - X dimension values

y - Y dimension values

polygons - PolygonShape list

返回:

Result array with cell values of missing outside polygons

maskout

public static Array maskout(Array a,
                            java.util.List<java.lang.Number> x,
                            java.util.List<java.lang.Number> y,
                            java.util.List<PolygonShape> polygons,
                            java.lang.Number missingValue)

Maskout function

参数:

a - Array a

x - X dimension values

y - Y dimension values

polygons - PolygonShape list

missingValue - Missing value

返回:

Result array with cell values of missing outside polygons

maskout

public static Array maskout(Array a,
                            Array m,
                            java.lang.Number missingValue)

Maskout function

参数:

a - Array a

m - Array mask

missingValue - Missing value

返回:

Result array

maskout

public static Array maskout(Array a,
                            Array m)

Maskout function

参数:

a - Array a

m - Array mask

返回:

Result array

maskin

public static Array maskin(Array a,
                           Array m)

Maskin function

参数:

a - Array a

m - Array mask

返回:

Result array

isConvex

public static boolean isConvex(java.util.List<? extends PointD> points)

Check if a polygon is convex

参数:

points - Outline point of the polygon

返回:

Is convex or not

isConvex

public static boolean isConvex(Polygon polygon)

Check if a polygon is convex

参数:

polygon - The polygon

返回:

Is convex or not