Contents

---
layout: post
title:  "Noise Modes"
---

### Name ###

There are two noise modes available in PiCrate, both base on KdotJPG java noise.
The default noise uses the FastNoise module, the SmoothNoise module can be used using the module name as a prefix see example below.

### Examples ###

```ruby
#!/usr/bin/env jruby -w
require 'picrate'

class TestNoise < Processing::App
  attr_reader :z

  def setup
    stroke(255, 64)
    @z = 0
  end

  def draw
    noise_scale = 0.01
    background(0)
    grid(width, height, 10, 10) do |x, y|
      arrow(x, y, SmoothNoise.noise(x * noise_scale, y * noise_scale, z * noise_scale) * TWO_PI * 2)
      # arrow(x, y, noise(x * noise_scale, y * noise_scale, z * noise_scale) * TWO_PI * 2)
    end
    @z += 1
  end

  def arrow(x, y, ang)
    push_matrix()
    translate(x, y)
    rotate(ang)
    line(0, 0, 20, 0)
    translate(20, 0)
    rotate(PI + 0.4)
    line(0, 0, 5, 0)
    rotate(-0.8)
    line(0, 0, 5, 0)
    pop_matrix()
  end

  def settings
    size(600, 400, P2D)
  end
end

TestNoise.new

```

### Description	###

Currently supports four implementations of noise:-
1. Default is classic OpenSimplex2
2. SmoothNoise use smoother class OpenSimplex2F
3. Use tnoise instead of noise for a noise mode more suited to terrain

### Syntax ###

```ruby
SmoothNoise.noise(...) # no prefix for fast classic OpenSimplex2
```

### Related ###

`noise(x, y, z, w)`

`noise(x, y, z)`

`noise(x, y)`

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
picrate-2.5.2-java	docs/_methods/noise_modes.md
picrate-2.5.1-java	docs/_methods/noise_modes.md
picrate-2.5.0-java	docs/_methods/noise_modes.md