Package com.geodesk.geom

Enum Class Heading

java.lang.Object

java.lang.Enum<Heading>

com.geodesk.geom.Heading

All Implemented Interfaces:

Serializable, Comparable<Heading>, Constable

public enum Heading
extends Enum<Heading>

Compass headings. Keep in mind that unlike screen coordinates, planar coordinate values *increase* as one moves "up" (north).

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
EAST
NORTH
NORTHEAST
NORTHWEST
SOUTH
SOUTHEAST
SOUTHWEST
WEST

Method Summary

Modifier and Type	Method	Description
int	eastFactor()
static Heading	fromDegrees(double degrees)	Returns the Heading closest to the given compass heading in degrees (0 = north, 90 = east, etc.)
String	id()
int	northFactor()
static Coordinate	project(double angle, double distance)	Determines the coordinate that lies a given distance from the center of the plane, in a given heading
static LineSegment	project(double angle, double distance, Coordinate from)
static LineString	projectedLine(GeometryFactory factory, double angle, double distance, Coordinate from)
Heading	reversed()	Returns the opposite heading.
int	toDegrees()	Heading in degrees.
String	toString()
Heading	turnedBy(double degrees)
static double	turnedBy(double fromDegrees, double byDegrees)
static Heading	valueOf(String name)	Returns the enum constant of this class with the specified name.
static Heading[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

NORTH

public static final Heading NORTH

NORTHEAST

public static final Heading NORTHEAST

EAST

public static final Heading EAST

SOUTHEAST

public static final Heading SOUTHEAST

SOUTH

public static final Heading SOUTH

SOUTHWEST

public static final Heading SOUTHWEST

WEST

public static final Heading WEST

NORTHWEST

public static final Heading NORTHWEST

Method Details

values

public static Heading[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static Heading valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

toString

public String toString()

Overrides:

toString in class Enum<Heading>

id

public String id()

northFactor

public int northFactor()

eastFactor

public int eastFactor()

toDegrees

public int toDegrees()

Heading in degrees.

Returns:

0 = north, 90 = east, etc.

reversed

public Heading reversed()

Returns the opposite heading.

Returns:

the heading that lies 180 degrees opposite.

turnedBy

public Heading turnedBy(double degrees)

fromDegrees

public static Heading fromDegrees(double degrees)

Returns the Heading closest to the given compass heading in degrees (0 = north, 90 = east, etc.)

Parameters:

degrees - (must be 0 <= degrees < 360)

Returns:

turnedBy

public static double turnedBy(double fromDegrees,
 double byDegrees)

project

public static Coordinate project(double angle,
 double distance)

Determines the coordinate that lies a given distance from the center of the plane, in a given heading

Parameters:

angle - heading in degrees (0 = north, 90 = east)

distance - distance

Returns:

the coordinate

project

public static LineSegment project(double angle,
 double distance,
 Coordinate from)

Parameters:

angle -

distance -

from -

Returns:

projectedLine

public static LineString projectedLine(GeometryFactory factory,
 double angle,
 double distance,
 Coordinate from)