AFNI program: CreateIcosahedron
Output of -help
Usage: CreateIcosahedron [-rad r] [-rd recDepth] [-ld linDepth]
[-ctr ctr] [-prefix fout] [-help]
-rad r: size of icosahedron. (optional, default 100)
The edge length l = 4 r / sqrt(10+2sqrt(5))
The area a = 5 sqrt(3) l^2
The volume v = 5/12 (3+sqrt(5)) l^3
-rd recDepth: recursive (binary) tessellation depth for icosahedron
(optional, default:3)
(recommended to approximate number of nodes in brain: 6
let rd2 = 2 * recDepth
Nvert = 2 + 10 * 2^rd2
Ntri = 20 * 2^rd2
Nedge = 30 * 2^rd2
-ld linDepth: number of edge divides for linear icosahedron tessellation
(optional, default uses binary tessellation).
Nvert = 2 + 10 * linDepth^2
Ntri = 20 * linDepth^2
Nedge = 30 * linDepth^2
-min_nodes MIN_NODES: Automatically select the -ld value which produces an
icosahedron of at least MIN_NODES nodes.
-nums: output the number of nodes (vertices), triangles, edges,
total volume and total area then quit
-nums_quiet: same as -nums but less verbose. For the machine in you.
-ctr ctr: coordinates of center of icosahedron.
(optional, default 0,0,0)
-tosphere: project nodes to sphere.
-prefix fout: prefix for output files.
(optional, default CreateIco)
The surface is written out in FreeSurfer's .asc
format by default. To change that, include a
valid extension to the prefix such as: fout.gii
-help: help message
Compile Date:
Oct 31 2024
Brenna D. Argall LBC/NIMH/NIH bargall@codon.nih.gov
Ziad S. Saad SSC/NIMH/NIH saadz@mail.nih.gov
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Thu Oct 31 09:43:30 PM EDT 2024