The routine returns the endpoints (for segment and directed segment), and vertices (for triangle) of obj.

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

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

$\mathrm{point}\left(A\,0\,0\,0\right),\mathrm{point}\left(B\,1\,1\,1\right)\:$

$\mathrm{segment}\left(\mathrm{seg}\,\left[A\,B\right]\right)\:$

$\mathrm{DefinedAs}\left(\mathrm{seg}\right)$

$\left[A\,B\right]$

$\mathrm{map}\left(\mathrm{coordinates}\,\right)$

$\left[\left[0\,0\,0\right]\,\left[1\,1\,1\right]\right]$

$\mathrm{point}\left(C\,1\,0\,3\right)\:$

$\mathrm{triangle}\left(T\,\left[A\,B\,C\right]\right)\:$

$\mathrm{DefinedAs}\left(T\right)$

$\left[A\,B\,C\right]$

$\mathrm{map}\left(\mathrm{coordinates}\,\right)$

$\left[\left[0\,0\,0\right]\,\left[1\,1\,1\right]\,\left[1\,0\,3\right]\right]$