<table border="0" width="100%"> <tbody> <tr> <td align="left"> <p> Extrusion geometry is defined by a 2D cross-section that is stretched and rotated around a central spine. </p> <p> Extruded shapes are very common: tubes, pipes, bars, vases, donuts, and other tricky uses. An Extrusion node efficiently creates extruded shapes. The crossSection field specifies the cross-section, and the spine field specifies the sweep path. The scale and orientation fields specify scaling and rotation at each spine point. </p> <p> These X3D scenes are adapted directly from the <a href="http://www.wiley.com/legacy/compbooks/vrml2sbk/toc/ch15.htm" target="_Vrml2Sourcebook">original VRML 2.0 Sourcebook chapter examples</a>. Also available: <a href="http://www.sdsc.edu/~moreland/courses/Siggraph98/vrml97/slides/mt0208.htm" target="_Vrml2SourcebookCourse">Introduction to VRML97 SIGGRAPH98 course notes</a>. </p> </td> <td align="center" rowspan="2"> <a href="index.html"><img border="0" alt="Figure 15.10 Extruded Room With Axes" title="Figure 15.10 Extruded Room With Axes" hspace="10" src="_viewpoints/Figure15_10ExtrudedRoomWithAxes.x3d._VP_Extruded_room_with_a_doorway.png" width="156" height="89" align="middle"/></a> </td> </tr> </tbody> </table>