 is true if the transform element is a joint, that is, its
parameter is of the form 'qN'.

</p>
<hr>
<a name="isprismatic"><h1>ETS3.isprismatic</h1></a>
<p><span class="helptopic">Test if transform is prismatic joint</span></p><p>
E.isprismatic is true if the transform element is a joint, that is, its
parameter is of the form 'qN' and it controls a translation.

</p>
<hr>
<a name="mtimes"><h1>ETS3.mtimes</h1></a>
<p><span class="helptopic">Compound transforms</span></p><p>
E1 * E2 is a sequence of two eleme