com.jhlabs.map
Class MapMath

java.lang.Object
  com.jhlabs.map.MapMath

public class MapMath
extends Object

Field Summary

static int	COLLINEAR
static int	DO_INTERSECT
static int	DONT_INTERSECT
static double	DTR
static double	HALFPI
static double	QUARTERPI
static double	RTD
static double	TWOPI
static Rectangle2D	WORLD_BOUNDS
static Rectangle2D	WORLD_BOUNDS_RAD

Constructor Summary

MapMath()

Method Summary

static double	acos(double v)
static double	acosd(double v)
static Point2D.Double	add(Point2D.Double a, Point2D.Double b)
static double	asin(double v)
static double	asind(double v)
static double	atan2(double y, double x)
static double	atan2d(double y, double x)
static double	atand(double v)
static double	authlat(double beta, double[] APA)
static double[]	authset(double es)
static double	cosd(double v)
static double	cross(double x1, double y1, double x2, double y2)
static double	cross(Point2D.Double a, Point2D.Double b)
static double	degToRad(double v)
static double	distance(double dx, double dy)
static double	distance(Point2D.Double a, Point2D.Double b)
static double	dmsToDeg(double d, double m, double s)
static double	dmsToRad(double d, double m, double s)
static double	dot(Point2D.Double a, Point2D.Double b)
static double[]	enfn(double es)
static double	frac(double v)
static double	geocentricLatitude(double lat, double flatness)
static double	geographicLatitude(double lat, double flatness)
static double	greatCircleDistance(double lon1, double lat1, double lon2, double lat2)
static double	hypot(double x, double y)
static int	intersectSegments(Point2D.Double aStart, Point2D.Double aEnd, Point2D.Double bStart, Point2D.Double bEnd, Point2D.Double p)
static double	inv_mlfn(double arg, double es, double[] en)
static double	longitudeDistance(double l1, double l2)
static double	mlfn(double phi, double sphi, double cphi, double[] en)
static double	msfn(double sinphi, double cosphi, double es)
static Point2D.Double	multiply(Point2D.Double a, Point2D.Double b)
static void	negate(Point2D.Double a)
static double	niceNumber(double x, boolean round)
static void	normalize(Point2D.Double a)
static double	normalizeAngle(double angle)
static double	normalizeLatitude(double angle)
static double	normalizeLongitude(double angle) normalize longitude angle in radians
static Point2D.Double	perpendicular(Point2D.Double a)
static double	phi2(double ts, double e)
static double	qsfn(double sinphi, double e, double one_es)
static double	radToDeg(double v)
static boolean	sameSigns(double a, double b)
static boolean	sameSigns(int a, int b)
static double	sind(double v) Degree versions of trigonometric functions
static double	sphericalAzimuth(double lat0, double lon0, double lat, double lon)
static double	sqrt(double v)
static Point2D.Double	subtract(Point2D.Double a, Point2D.Double b)
static double	takeSign(double a, double b)
static int	takeSign(int a, int b)
static double	tand(double v)
static double	trunc(double v)
static double	tsfn(double phi, double sinphi, double e)

Methods inherited from class java.lang.Object

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

Field Detail

HALFPI

public static final double HALFPI

See Also:

Constant Field Values

QUARTERPI

public static final double QUARTERPI

See Also:

Constant Field Values

TWOPI

public static final double TWOPI

See Also:

Constant Field Values

RTD

public static final double RTD

See Also:

Constant Field Values

DTR

public static final double DTR

See Also:

Constant Field Values

WORLD_BOUNDS_RAD

public static final Rectangle2D WORLD_BOUNDS_RAD

WORLD_BOUNDS

public static final Rectangle2D WORLD_BOUNDS

DONT_INTERSECT

public static final int DONT_INTERSECT

See Also:

Constant Field Values

DO_INTERSECT

public static final int DO_INTERSECT

See Also:

Constant Field Values

COLLINEAR

public static final int COLLINEAR

See Also:

Constant Field Values

Constructor Detail

MapMath

public MapMath()

Method Detail

sind

public static double sind(double v)

Degree versions of trigonometric functions

cosd

public static double cosd(double v)

tand

public static double tand(double v)

asind

public static double asind(double v)

acosd

public static double acosd(double v)

atand

public static double atand(double v)

atan2d

public static double atan2d(double y,
                            double x)

asin

public static double asin(double v)

acos

public static double acos(double v)

sqrt

public static double sqrt(double v)

distance

public static double distance(double dx,
                              double dy)

distance

public static double distance(Point2D.Double a,
                              Point2D.Double b)

hypot

public static double hypot(double x,
                           double y)

atan2

public static double atan2(double y,
                           double x)

trunc

public static double trunc(double v)

frac

public static double frac(double v)

degToRad

public static double degToRad(double v)

radToDeg

public static double radToDeg(double v)

dmsToRad

public static double dmsToRad(double d,
                              double m,
                              double s)

dmsToDeg

public static double dmsToDeg(double d,
                              double m,
                              double s)

normalizeLatitude

public static double normalizeLatitude(double angle)

normalizeLongitude

public static double normalizeLongitude(double angle)

normalize longitude angle in radians

Parameters:

angle -

Returns:

normalizeAngle

public static double normalizeAngle(double angle)

greatCircleDistance

public static double greatCircleDistance(double lon1,
                                         double lat1,
                                         double lon2,
                                         double lat2)

sphericalAzimuth

public static double sphericalAzimuth(double lat0,
                                      double lon0,
                                      double lat,
                                      double lon)

sameSigns

public static boolean sameSigns(double a,
                                double b)

sameSigns

public static boolean sameSigns(int a,
                                int b)

takeSign

public static double takeSign(double a,
                              double b)

takeSign

public static int takeSign(int a,
                           int b)

intersectSegments

public static int intersectSegments(Point2D.Double aStart,
                                    Point2D.Double aEnd,
                                    Point2D.Double bStart,
                                    Point2D.Double bEnd,
                                    Point2D.Double p)

dot

public static double dot(Point2D.Double a,
                         Point2D.Double b)

perpendicular

public static Point2D.Double perpendicular(Point2D.Double a)

add

public static Point2D.Double add(Point2D.Double a,
                                 Point2D.Double b)

subtract

public static Point2D.Double subtract(Point2D.Double a,
                                      Point2D.Double b)

multiply

public static Point2D.Double multiply(Point2D.Double a,
                                      Point2D.Double b)

cross

public static double cross(Point2D.Double a,
                           Point2D.Double b)

cross

public static double cross(double x1,
                           double y1,
                           double x2,
                           double y2)

normalize

public static void normalize(Point2D.Double a)

negate

public static void negate(Point2D.Double a)

longitudeDistance

public static double longitudeDistance(double l1,
                                       double l2)

geocentricLatitude

public static double geocentricLatitude(double lat,
                                        double flatness)

geographicLatitude

public static double geographicLatitude(double lat,
                                        double flatness)

tsfn

public static double tsfn(double phi,
                          double sinphi,
                          double e)

msfn

public static double msfn(double sinphi,
                          double cosphi,
                          double es)

phi2

public static double phi2(double ts,
                          double e)

enfn

public static double[] enfn(double es)

mlfn

public static double mlfn(double phi,
                          double sphi,
                          double cphi,
                          double[] en)

inv_mlfn

public static double inv_mlfn(double arg,
                              double es,
                              double[] en)

authset

public static double[] authset(double es)

authlat

public static double authlat(double beta,
                             double[] APA)

qsfn

public static double qsfn(double sinphi,
                          double e,
                          double one_es)

niceNumber

public static double niceNumber(double x,
                                boolean round)