:orphan: .. _ahelp_CreateIcosahedron: ***************** CreateIcosahedron ***************** .. contents:: :local: | .. code-block:: none 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) tesselation 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 tesselation (optional, default uses binary tesselation). 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 13 2022 Brenna D. Argall LBC/NIMH/NIH bargall@codon.nih.gov