the tbox argument can be used to further refine the octree.</p>
<p>This function takes into account three main parameters which are vmin, snears and dfars.</p>
<ul class="simple">
<li><p>vmin is a global parameter that controls the minimum number of cells per direction for each octree level. For example, a small vmin value will result in a small number of points against a large number of elementary Cartesian blocks, as well as more frequent resolution changes from the wall boundaries. Empirically, one shoul