grid3 ¶This module, contributed by Philippe Ivaldi, can be used for drawing
3D grids. Here is an example (further examples can be found in
grid3.asy and at https://web.archive.org/web/20201130113133/http://www.piprime.fr/files/asymptote/grid3/):
import grid3;
size(8cm,0,IgnoreAspect);
currentprojection=orthographic(0.5,1,0.5);
scale(Linear, Linear, Log);
limits((-2,-2,1),(0,2,100));
grid3(XYZgrid);
xaxis3(Label("$x$",position=EndPoint,align=S),Bounds(Min,Min),
OutTicks());
yaxis3(Label("$y$",position=EndPoint,align=S),Bounds(Min,Min),OutTicks());
zaxis3(Label("$z$",position=EndPoint,align=(-1,0.5)),Bounds(Min,Min),
OutTicks(beginlabel=false));