Tool NameFractal Brownian Noise
Tool ID17
Library IDgrid_calculus
Version1.0
Author(s)A.Jack, O.Conrad (c) 2017

Description

This tool uses uniform random to create a grid that resembles fractal Brownian noise (FBN). The advantage of FBN noise is that it appears to have texture to the human eye, that resembles the types of textures that are observed in nature; terrains, algae growth, clouds, etc. The degree of texture observed in the FBN grid is dependent upon the sizes of the wavelengths chosen. The wavelengths should be chosen so they increase in size (a doubling of successive wavelengths is a good point to start). The greater the magnitude of the "ramp" of successive wavelengths the greater the texture in the FBN grid.

Parameters

NameTypeIdentifierDescriptionConstraints
Input
Target Systemgrid, input, optionalTARGET_TEMPLATEuse this grid's system for output grids
Output
Fractal Brownian Noisegrid, outputOUT_GRID
Options
ScalingchoiceSCALINGAvailable Choices:
[0] linear
[1] geometric
Default: 1
Maximum Scalefloating point numberMAX_SCALEMinimum: 0.000000
Default: 1.000000
Stepsinteger numberSTEPSMinimum: 1
Default: 8
Noise Rangevalue rangeRANGE
Target Grid SystemchoiceTARGET_DEFINITIONAvailable Choices:
[0] user defined
[1] grid or grid system
Default: 0
Cellsizefloating point numberTARGET_USER_SIZEMinimum: 0.000000
Default: 1.000000
Westfloating point numberTARGET_USER_XMINDefault: 0.000000
Eastfloating point numberTARGET_USER_XMAXDefault: 100.000000
Southfloating point numberTARGET_USER_YMINDefault: 0.000000
Northfloating point numberTARGET_USER_YMAXDefault: 100.000000
Columnsinteger numberTARGET_USER_COLSNumber of cells in East-West direction.Minimum: 1
Default: 101
Rowsinteger numberTARGET_USER_ROWSNumber of cells in North-South direction.Minimum: 1
Default: 101
RoundingbooleanTARGET_USER_FLATRound bounding coordinates to multiples of cell size. Ignored if cell size has decimal places.Default: 1
FitchoiceTARGET_USER_FITSAvailable Choices:
[0] nodes
[1] cells
Default: 0