jvx.numeric

Class PnNoise

java.lang.Object

jvx.numeric.PnNoise

public class PnNoise
extends java.lang.Object

Generates 2D procedural white noise by hashtable-like method to generate a gradient on an integer lattice that is made continuous by smoothed interpolation. Noise is 256-periodic.

Author:

Eike Preuß

Version:

15.05.05, 2.00 revised (kp) Formatted according to jv style.
20.02.03, 1.20 revised (ep) New method intNoise. Check for negative (x,y) values added.
08.07.01, 1.10 revised (ep) Converted to float.

Field Summary

Fields

Modifier and Type	Field and Description
int[][]	m_preComputedNoise

Constructor Summary

Constructors

Constructor and Description
PnNoise() Creates and initializes new noise

Method Summary

Modifier and Type	Method and Description
int	getPreComputedNoise(int x, int y) Call preComputeNoise(double, int, int, int, int) before using this.
int	intNoise(double x, double y) Value of white noise at given 2D point.
float	noise(float x, float y) Value of white noise at given 2D point.
void	preComputeNoise(double coarseness, int xmin, int ymin, int xmax, int ymax)

Methods inherited from class java.lang.Object

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

Field Detail

m_preComputedNoise

public int[][] m_preComputedNoise

Constructor Detail

PnNoise

public PnNoise()

Creates and initializes new noise

Method Detail

noise

public float noise(float x,
                   float y)

Value of white noise at given 2D point.

Returns:

noise value [-1;1]

intNoise

public int intNoise(double x,
                    double y)

Value of white noise at given 2D point.

Returns:

noise value [0;255]

preComputeNoise

public void preComputeNoise(double coarseness,
                            int xmin,
                            int ymin,
                            int xmax,
                            int ymax)

Since:

JavaView 2.65.000

getPreComputedNoise

public int getPreComputedNoise(int x,
                               int y)

Call preComputeNoise(double, int, int, int, int) before using this.

Since:

JavaView 2.65.000