March 2021 -release

[sampsapursiainen]

Branch March2021 was merged with the master branch and released on March 4th.

Release notes:
Mesh generation speedup gain for non-GPU computers. Files updated:

tetra_in_compartment.m: STL mesh can be downsampled by giving threshold value for the maximal number of triangles (the corresponding variable is zef.meshing accuracy).

zef_ini.m: the defaulf value of the zef.meshing_accuracy has been set to zef.meshing_accuracy = 5000 to allow fast generation of volumetric meshes without GPU. The most accurate outcome with zef.meshing_accuracy = 1 is recommended if there is a GPU.

ADDED: zef_downsample_surfaces.m: A surface mesh downsampling utility. The code can be run from the mesh tool. Downsampling might be essential when running the codes without a GPU.

ADDED: zef_field_downsampling.m: A field downsampling utility for reducing the size of the primary parameter field.

ADDED: Mesh visualization tool: The main options controlling the visualization of

ADDED: "ZeffiroESWorkbench" (plugins + updated .init file), a plugin wherein the user can use numerical optimization method (currently: Linear programming with Dual-Simplex method) for promoting sparsity among the active electrode used during a Transcranial Electrical Stimulation (tES) session. The resulting current field distribution is generated by the synthetic sources and the sparsity to be applied is affected based on physiological attributes and Linear Programming (LP) Solver parameters that the user can set with this plugin. A visualization method is added to display such Electrode Activity in the form of spheres attached to the scalp where a colorbar represents the amount of amperage (A)/Electrode.

Data structures have been adapted to allow modification of the compartment order and number.