idth="150"><a href="html/trlog.html">trlog</a></td><td width="300">efficient logarithm</td></tr>
<tr><td width="150"><a href="html/trnorm.html">trnorm</a></td><td width="300">normalize HT</td></tr>
<tr><td width="150"><a href="html/trot2.html">trot2</a></td><td width="300">HT for rotation in 2D</td></tr>
<tr><td width="150"><a href="html/trotx.html">trotx</a></td><td width="300">HT for rotation about X-axis</td></tr>
<tr><td width="150"><a href="html/troty.html">troty</a></td><td width="300">HT for rotation