com.hannesdorfmann.swipeback.util

Class MathUtils

java.lang.Object

com.hannesdorfmann.swipeback.util.MathUtils

public class MathUtils
extends java.lang.Object

Little helper class that provides some useful mathematical methods

Constructor Summary

Constructors

Constructor and Description
MathUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	isBetween(float x, float down, float up) Checks if a value is between up and down (inclusive up and down)
static float	mapPoint(float x, float sourceStart, float sourceEnd, float targetStart, float targetEnd) This method maps a number x, which is in the range [sourceStart, sourceEnd], to a new range [targetStart, targetEnd] sourceStart <= x <= sourceEnd targetStart <= returnValue <= targetEnd
static int	mapPoint(float x, float sourceStart, float sourceEnd, int targetStart, int targetEnd) This is the same as mapPoint(float, float, float, float, float)but without rounding the integer up.
static int	mapPointRound(float x, float sourceStart, float sourceEnd, int targetStart, int targetEnd) This is the same as mapPoint(float, float, float, float, float)but rounds to integer.

Methods inherited from class java.lang.Object

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

Constructor Detail

MathUtils

public MathUtils()

Method Detail

mapPoint

public static float mapPoint(float x,
                             float sourceStart,
                             float sourceEnd,
                             float targetStart,
                             float targetEnd)

This method maps a number x, which is in the range [sourceStart, sourceEnd], to a new range [targetStart, targetEnd]

sourceStart <= x <= sourceEnd
targetStart <= returnValue <= targetEnd

Parameters:

x - The value that should be mapped

sourceStart - The source range start (inclusive)

sourceEnd - The source range end (inclusive)

targetStart - The target range start (inclusive)

targetEnd - The target range end (inclusive)

Returns:

The corresponding value of x in the target range

mapPoint

public static int mapPoint(float x,
                           float sourceStart,
                           float sourceEnd,
                           int targetStart,
                           int targetEnd)

This is the same as mapPoint(float, float, float, float, float)but without rounding the integer up. Use mapPointRound(float, float, float, int, int) if you want rounded results

This method maps a number x, which is in the range [sourceStart, sourceEnd], to a new range [targetStart, targetEnd]

sourceStart <= x <= sourceEnd
targetStart <= returnValue <= targetEnd

Parameters:

x - The value that should be mapped

sourceStart - The source range start (inclusive)

sourceEnd - The source range end (inclusive)

targetStart - The target range start (inclusive)

targetEnd - The target range end (inclusive)

Returns:

The corresponding value of x in the target range

mapPointRound

public static int mapPointRound(float x,
                                float sourceStart,
                                float sourceEnd,
                                int targetStart,
                                int targetEnd)

This is the same as mapPoint(float, float, float, float, float)but rounds to integer.

This method maps a number x, which is in the range [sourceStart, sourceEnd], to a new range [targetStart, targetEnd]

sourceStart <= x <= sourceEnd
targetStart <= returnValue <= targetEnd

Parameters:

x - The value that should be mapped

sourceStart - The source range start (inclusive)

sourceEnd - The source range end (inclusive)

targetStart - The target range start (inclusive)

targetEnd - The target range end (inclusive)

Returns:

The corresponding value of x in the target range

isBetween

public static boolean isBetween(float x,
                                float down,
                                float up)

Checks if a value is between up and down (inclusive up and down)

Parameters:

x -

down -

up -

Returns: