org.osmdroid.util

Class MyMath

java.lang.Object

org.osmdroid.util.MyMath

All Implemented Interfaces:

MathConstants

public class MyMath
extends Object
implements MathConstants

Field Summary

Fields inherited from interface org.osmdroid.views.util.constants.MathConstants

DEG2RAD, PI, PI_2, PI_4, RAD2DEG

Method Summary

Modifier and Type	Method and Description
static double	cleanPositiveAngle(double pAngle)
static double	computeAngle(long pX1, long pY1, long pX2, long pY2)
static void	computeCirclePoint(long pCenterX, long pCenterY, double pRadius, double pAngle, PointL pOutput)
static int	floorToInt(double pValue)
static long	floorToLong(double pValue) Casting a _negative_ double into a long has a counter-intuitive result.
static double	getAngleDifference(double pStart, double pEnd, Boolean pClockwise)
static int	getNextSquareNumberAbove(float factor)
static double	gudermann(double y)
static double	gudermannInverse(double aLatitude)
static int	mod(int number, int modulus)

Methods inherited from class java.lang.Object

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

Method Detail

gudermannInverse

public static double gudermannInverse(double aLatitude)

gudermann

public static double gudermann(double y)

mod

public static int mod(int number,
                      int modulus)

floorToLong

public static long floorToLong(double pValue)

Casting a _negative_ double into a long has a counter-intuitive result. E.g. (long)(-0.4) = 0, though -1 would be expected. Math.floor would be the answer, but I assume we could go faster than (long)Math.floor

Since:

6.0.0

floorToInt

public static int floorToInt(double pValue)

Since:

6.0.0

getNextSquareNumberAbove

public static int getNextSquareNumberAbove(float factor)

Since:

6.1.0 Moved from another MyMath (org.osmdroid.views.util) Calculates i.e. the increase of zoomlevel needed when the visible latitude needs to be bigger by factor. Assert.assertEquals(1, getNextSquareNumberAbove(1.1f)); Assert.assertEquals(2, getNextSquareNumberAbove(2.1f)); Assert.assertEquals(2, getNextSquareNumberAbove(3.9f)); Assert.assertEquals(3, getNextSquareNumberAbove(4.1f)); Assert.assertEquals(3, getNextSquareNumberAbove(7.9f)); Assert.assertEquals(4, getNextSquareNumberAbove(8.1f)); Assert.assertEquals(5, getNextSquareNumberAbove(16.1f)); Assert.assertEquals(-1, - getNextSquareNumberAbove(1 / 0.4f) + 1); Assert.assertEquals(-2, - getNextSquareNumberAbove(1 / 0.24f) + 1);

getAngleDifference

public static double getAngleDifference(double pStart,
                                        double pEnd,
                                        Boolean pClockwise)

Parameters:

pStart - start angle

pEnd - end angle

pClockwise - if null, get the smallest difference (in absolute value) if true, go clockwise if false, go anticlockwise

Since:

6.1.0

cleanPositiveAngle

public static double cleanPositiveAngle(double pAngle)

Parameters:

pAngle - angle in degree

Returns:

the same angle in [0,360[

Since:

6.1.0

computeAngle

public static double computeAngle(long pX1,
                                  long pY1,
                                  long pX2,
                                  long pY2)

Since:

6.1.1 Computes the angle of a vector

computeCirclePoint

public static void computeCirclePoint(long pCenterX,
                                      long pCenterY,
                                      double pRadius,
                                      double pAngle,
                                      PointL pOutput)

Since:

6.1.1 Computes the point of a circle from its center, its radius and the angle