MathUtil

java.lang.Object

de.articdive.jnoise.core.util.MathUtil

public final class MathUtil extends Object

Utility class for mathematical functions.

Method Summary

Modifier and Type

Method

Description

static double

dot2D(double[] a, double[] b)

Calculates the dot product of the specified 2D vectors.

static double

dot3D(double[] a, double[] b)

Calculates the dot product of the specified 3D vectors.

static double

dot4D(double[] a, double[] b)

Calculates the dot product of the specified 4D vectors.

static double

exp2(double x)

Calculates 2^x of the specified value.

static double

log2(double x)

Calculates log_2 of the specified value.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details
- exp2
  
  public static double exp2(double x)
  
  Calculates 2^x of the specified value.
  
  Parameters:
  
  x - specified value
  
  Returns:
  
  2^x.
- log2
  
  public static double log2(double x)
  
  Calculates log_2 of the specified value.
  
  Parameters:
  
  x - specified value
  
  Returns:
  
  log_2(x).
- dot2D
  
  public static double dot2D(double[] a, double[] b)
  
  Calculates the dot product of the specified 2D vectors.
  
  Parameters:
  
  a - a double array representing a 2D vector.
  
  b - a double array representing a 2D vector.
  
  Returns:
  
  the dot product of the two 2D vectors.
- dot3D
  
  public static double dot3D(double[] a, double[] b)
  
  Calculates the dot product of the specified 3D vectors.
  
  Parameters:
  
  a - a double array representing a 3D vector.
  
  b - a double array representing a 3D vector.
  
  Returns:
  
  the dot product of the two 3D vectors.
- dot4D
  
  public static double dot4D(double[] a, double[] b)
  
  Calculates the dot product of the specified 4D vectors.
  
  Parameters:
  
  a - a double array representing a 4D vector.
  
  b - a double array representing a 4D vector.
  
  Returns:
  
  the dot product of the two 4D vectors.