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.

Constructor Summary

PnNoise()
Creates and initializes new noise

Method Summary

protected double	glattice(int ix, int iy, double fx, double fy) Gets the share of a single lattice point to the gradient value of point (ix+fx, iy+fy).
protected int	index(int x, int y) Gets the table index of the integer lattice point (x,y).
double	noise(double x, double y) Value of white noise at given 2D point.
protected double	smoothstep(double x) Smoothed linear interpolation between zero and one.

Methods inherited from class java.lang.Object

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

Constructor Detail

PnNoise

public PnNoise()

Creates and initializes new noise

Method Detail

index

protected int index(int x,
                    int y)

Gets the table index of the integer lattice point (x,y).

glattice

protected double glattice(int ix,
                          int iy,
                          double fx,
                          double fy)

Gets the share of a single lattice point to the gradient value of point (ix+fx, iy+fy).

smoothstep

protected double smoothstep(double x)

Smoothed linear interpolation between zero and one.

Parameters:

x - out of [0;1]

noise

public double noise(double x,
                    double y)

Value of white noise at given 2D point.

Returns:

noise value [-1;1]