<table border="0" width="100%"> <tbody> <tr> <td align="center" rowspan="2"> <a href="index.html"><img border="0" alt="Figure 06.09 Triple Asterisk 3D With Axes" title="Figure 06.09 Triple Asterisk 3D With Axes" hspace="10" src="_viewpoints/Figure06_09TripleAsterisk3dWithAxes.x3d._VP_View_shape.png" width="156" height="89" align="middle"/></a> </td> <td align="left"> <p> Rotations can transform the orientation of a shape in any direction. </p> <p> Rotation orients a coordinate system about a rotation axis by a rotation angle measured in radians. To help remember positive and negative rotation directions: open your hand, stick out your thumb, aim your thumb in an axis positive direction, and curl your fingers around the axis. The curl direction is a positive rotation. </p> <p> These X3D scenes are adapted directly from the <a href="http://www.wiley.com/legacy/compbooks/vrml2sbk/toc/ch06.htm" target="_Vrml2Sourcebook">original VRML 2.0 Sourcebook chapter examples</a>. Also available: <a href="http://www.sdsc.edu/~moreland/courses/Siggraph98/vrml97/slides/mt0059.htm" target="_Vrml2SourcebookCourse">Introduction to VRML97 SIGGRAPH98 course notes</a>. </p> </td> </tr> </tbody> </table>