The routine returns the form of the given object supported by the geom3d package; FAIL otherwise.

The command with(geom3d,form) allows the use of the abbreviated form of this command.

$\mathrm{with}\left(\mathrm{geom3d}\right)\:$

$\mathrm{point}\left(A\,1\,2\,3\right)$

$A$

$\mathrm{form}\left(A\right)$

$\mathrm{point3d}$

$\mathrm{dodecahedron}\left(d\,\mathrm{point}\left(o\,0\,0\,0\right)\,1\right)$

$d$

$\mathrm{form}\left(d\right)$

$\mathrm{dodecahedron3d}$