Package com.palmergames.util

Class MathUtil

java.lang.Object

com.palmergames.util.MathUtil

public class MathUtil
extends Object

Constructor Summary

Constructors

Constructor	Description
MathUtil()

Method Summary

Modifier and Type	Method	Description
static double	distance(double a, double b)	Compute the shortest distance between two perpendicular lines.
static double	distance(double x1, double x2, double y1, double y2)	Compute the shortest distance between two points in a 2d grid.
static double	distance(Coord coord1, Coord coord2)
static double	distanceSquared(double a, double b)	Compute the pythagorean square distance based on the formula a^2 + b^2 = c^2.
static double	getDoubleOrThrow(String input)
static int	getIntOrThrow(String input)
static int	getPositiveIntOrThrow(String input)
static double	sqr(double a)	Compute the square of a number.

Methods inherited from class java.lang.Object

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

Constructor Details

MathUtil

public MathUtil()

Method Details

sqr

public static double sqr(double a)

Compute the square of a number. NOTE: This function does not perform any safe-checks against overflow / underflow.

Parameters:

a - Number to square

Returns:

Square of the parameter passed in.

distanceSquared

public static double distanceSquared(double a,
 double b)

Compute the pythagorean square distance based on the formula a^2 + b^2 = c^2.

Parameters:

a - Length of an axis

b - Length of an axis

Returns:

The distance squared between two axis (which is c^2)

distance

public static double distance(double a,
 double b)

Compute the shortest distance between two perpendicular lines.

Parameters:

a - Length of a line

b - Length of another line

Returns:

the shortest distance between two lines

distance

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

Compute the shortest distance between two points in a 2d grid. Uses pythagorean formula.

Parameters:

x1 - X-coord of point 1

x2 - X-coord of point 2

y1 - Y-coord of point 1

y2 - Y-coord of point 2

Returns:

shortest distance between two points.

distance

public static double distance(Coord coord1,
 Coord coord2)

getDoubleOrThrow

public static double getDoubleOrThrow(String input)
                               throws TownyException

Throws:

TownyException

getIntOrThrow

public static int getIntOrThrow(String input)
                         throws TownyException

Throws:

TownyException

getPositiveIntOrThrow

public static int getPositiveIntOrThrow(String input)
                                 throws TownyException

Throws:

TownyException