mac

Note

This command has been ported to the new APBS syntax (see YAML- and JSON-format input files); see TABIParameters.multipole_acceptance_criterion().

TABI-PB parameter, multipole acceptance criterion (MAC), that controls distance ratio at which the method uses direct summation or Taylor approximation (a particle-cluster interaction) to calculate the integral kernels. The syntax is:

mac {theta}

where theta is a floating-point number from 0 to 1 controlling the distance ratio. This multipole acceptance criterion (MAC) is \(\frac{r_c}{R}\leqslant \theta\), where \(r_c\) is the cluster radius, and \(R\) is the distance of the particle to the cluster center. If the above relationship is satisfied, the Taylor approximation will be used instead of direct summation. A typical value for this parameter is 0.8.