Class MathUtils

java.lang.Object
org.jbox2d.common.PlatformMathUtils
org.jbox2d.common.MathUtils
public class MathUtils extends PlatformMathUtils
A few math methods that don't fit very well anywhere else.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final float
    DEG2RAD
    Degrees to radians conversion factor
    static final float
    HALF_PI
     
    static final float
    INV_PI
     
    static final float
    PI
     
    static final float
    QUARTER_PI
     
    static final float
    RAD2DEG
    Radians to degrees conversion factor
    static final float[]
    sinLUT
     
    static final float
    THREE_HALVES_PI
     
    static final float
    TWOPI
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    MathUtils()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static final float
    abs(float x)
     
    static final int
    abs(int x)
     
    static final float
    atan2(float y, float x)
     
    static final int
    ceil(float x)
     
    static final int
    ceilPowerOf2(int x)
    Rounds up the value to the nearest higher power^2 value.
    static final float
    clamp(float a, float low, float high)
    Returns the closest value to 'a' that is in between 'low' and 'high'
    static final Vec2
    clamp(Vec2 a, Vec2 low, Vec2 high)
     
    static final void
    clampToOut(Vec2 a, Vec2 low, Vec2 high, Vec2 dest)
     
    static final float
    cos(float x)
     
    static final float
    distance(Vec2 v1, Vec2 v2)
     
    static final float
    distanceSquared(Vec2 v1, Vec2 v2)
     
    static final float
    fastAtan2(float y, float x)
     
    static final int
    floor(float x)
     
    static final boolean
    isPowerOfTwo(int x)
     
    static final float
    map(float val, float fromMin, float fromMax, float toMin, float toMax)
     
    static final float
    max(float a, float b)
     
    static final int
    max(int a, int b)
     
    static final float
    min(float a, float b)
     
    static final int
    min(int a, int b)
     
    static final int
    nextPowerOfTwo(int x)
    Next Largest Power of 2: Given a binary integer value x, the next largest power of 2 can be computed by a SWAR algorithm that recursively "folds" the upper bits into the lower bits.
    static final float
    randomFloat(float argLow, float argHigh)
     
    static final float
    randomFloat(java.util.Random r, float argLow, float argHigh)
     
    static final float
    reduceAngle(float theta)
     
    static final int
    round(float x)
     
    static final float
    sin(float x)
     
    static final float
    sinLUT(float x)
     
    static final float
    sqrt(float x)
     

    Methods inherited from class PlatformMathUtils

    fastPow

    Methods inherited from class java.lang.Object

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

  • Field Details

  • Constructor Details

    • MathUtils

      public MathUtils()

  • Method Details

    • sin

      public static final float sin(float x)

    • sinLUT

      public static final float sinLUT(float x)

    • cos

      public static final float cos(float x)

    • abs

      public static final float abs(float x)

    • abs

      public static final int abs(int x)

    • floor

      public static final int floor(float x)

    • ceil

      public static final int ceil(float x)

    • round

      public static final int round(float x)

    • ceilPowerOf2

      public static final int ceilPowerOf2(int x)
      Rounds up the value to the nearest higher power^2 value.
      Parameters:
      x -
      Returns:
      power^2 value

    • max

      public static final float max(float a, float b)

    • max

      public static final int max(int a, int b)

    • min

      public static final float min(float a, float b)

    • min

      public static final int min(int a, int b)

    • map

      public static final float map(float val, float fromMin, float fromMax, float toMin, float toMax)

    • clamp

      public static final float clamp(float a, float low, float high)
      Returns the closest value to 'a' that is in between 'low' and 'high'

    • clamp

      public static final Vec2 clamp(Vec2 a, Vec2 low, Vec2 high)

    • clampToOut

      public static final void clampToOut(Vec2 a, Vec2 low, Vec2 high, Vec2 dest)

    • nextPowerOfTwo

      public static final int nextPowerOfTwo(int x)
      Next Largest Power of 2: Given a binary integer value x, the next largest power of 2 can be computed by a SWAR algorithm that recursively "folds" the upper bits into the lower bits. This process yields a bit vector with the same most significant 1 as x, but all 1's below it. Adding 1 to that value yields the next largest power of 2.

    • isPowerOfTwo

      public static final boolean isPowerOfTwo(int x)

    • atan2

      public static final float atan2(float y, float x)

    • fastAtan2

      public static final float fastAtan2(float y, float x)

    • reduceAngle

      public static final float reduceAngle(float theta)

    • randomFloat

      public static final float randomFloat(float argLow, float argHigh)

    • randomFloat

      public static final float randomFloat(java.util.Random r, float argLow, float argHigh)

    • sqrt

      public static final float sqrt(float x)

    • distanceSquared

      public static final float distanceSquared(Vec2 v1, Vec2 v2)

    • distance

      public static final float distance(Vec2 v1, Vec2 v2)