Note that this is one of the presentations from the 2017 European Tcl/Tk User Meeting, others are available at http://www.eurotcl.tcl3d.org/program.html http://

Note that this is one of the presentations from the 2017 European Tcl/Tk User Meeting, others are available at http://www.eurotcl.tcl3d.org/program.html http://www.eurotcl.tcl3d.org/program.html