Vector Turbulence¶
This Vector Turbulence node takes a list of Vectors and outputs a list of equal length containing Floats in the range 0.0 to 1.0. May output scalars or vectors. For some noise types, if your output goes to the texture viewer you need to remap them, otherwise your texture will be supersaturated or undersaturated. See below ‘range table’ for a detailed description.
Inputs & Parameters¶
Parameters |
Description |
|---|---|
Noise Function |
Pick between Scalar and Vector output |
Noise Type |
Pick between several noise types
See mathutils.noise docs ( Noise ) |
Octaves |
Accepts integers values The number of different noise frequencies used. |
Hard |
Accepts bool values: Hard( True ) or Soft( False ) Specifies whether returned turbulence is hard (sharp transitions) or soft (smooth transitions). |
Amplitude |
Accepts float values. The amplitude scaling factor. |
Frequency |
Accepts float values. The frequency scaling factor. |
Range table¶
Scalar values from turbulence node with size(n.verts)=64x64, step=0.05, octaves=3, amplitude=0.5, frequency=2.0, random seed=0. Plug a map range node in the scalar output and map it to the desired range (min=0, max=1) as in the image below.
Noise Type |
median |
maximum |
minimum |
|---|---|---|---|
Blender |
0.4574402868747711 |
1.2575798034667969 |
0.0 |
Stdperlin |
0.37063807249069214 |
0.972740530967712 |
0.0 |
Newperlin |
0.2982039898633957 |
0.7674642205238342 |
0.0 |
Voronoi_F1 |
0.5178706049919128 |
1.184566617012024 |
0.016996487975120544 |
Voronoi_F2 |
0.9441720247268677 |
1.696974754333496 |
0.07561451196670532 |
Voronoi_F3 |
1.3248268961906433 |
2.267115831375122 |
0.24465730786323547 |
Voronoi_F4 |
1.6119314432144165 |
2.4261345863342285 |
0.7868537306785583 |
Voronoi_F1F2 |
1.0320665836334229 |
1.7262239456176758 |
0.06919857859611511 |
Voronoi_Crackle |
1.5918831825256348 |
1.75 |
0.12337762117385864 |
Cellnoise |
0.9668738842010498 |
1.5000858306884766 |
0.1691771298646927 |
Generator-> Plane
Number-> A Number
Number-> Map Range
Viz-> Texture Viewer
Examples¶
Generator-> Plane
Number-> Map Range
Vector-> Vector Rewire
Selected Statistics: List->List Main-> List Statistics
List->List Struct-> List First & Last
Viz-> Texture Viewer
Viz-> Viewer Draw
Basic example with a Scalar output and Vector rewire node.
Notes¶
This documentation doesn’t do the full world of fractals any justice, feel free to send us layouts that you’ve made which rely on this node.
Links¶
Fractals description from wikipedia: https://en.wikipedia.org/wiki/Fractal
A Perlin Noise and Turbulence description by Prof. Paul Bourke: http://paulbourke.net/texture_colour/perlin/
An introduction on Noise and Turbulence by Dr. Matthew O. Ward: https://web.cs.wpi.edu/~matt/courses/cs563/talks/noise/noise.html
A very interesting resource is “the book of shaders”, it’s about shader programming but there is a very useful fractal paragraph:
http://thebookofshaders.com/13/ and on github repo: https://github.com/patriciogonzalezvivo/thebookofshaders/tree/master/13