<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html> <head> <title>Using VRML200X NurbsSurface with cosmoplayer</title> </head> <body> <ul> <li> <h3><a href="#nurbs">What are Nurbs ?</a></h3> </li> <li> <h3><a href="#browser">My browser do not understand "NurbsSurface"</a></h3> </li> </ul> <h2><a name="nurbs">What are Nurbs ?</a></h2> <p> NURBS means "Non-Uniform Rational B-Splines". In short, NURBS can be used to build rounded faces by transfering only very few data. A mathematical formula is used to construct the faces. </p> <h2><a name="browser">My browser do not understand "NurbsSurface"</a></h2> <p> NurbsSurface (and other Nurbs objects) are part of the coming <a href=http://www.web3d.org/technicalinfo/specifications/ISO_IEC_14772-All/part1/concepts.html#4.16> VRML200x VRML standard</a>. Some VRML97 browsers like cc3d or cortona already have the NurbsSurface Node available, while most other browsers do not support it yet.<br><br> White_dune support the NurbsSurface, but this would be useless for other browsers.<br><br> For the Cosmo Player browser (at least the version 2.1.5 on IRIX and and the version 2.1.1 on M$Windows), it is possible to use a <a href=NurbsSurfacePROTO.wrl>NurbsSurface PROTO</a> written in javascript to make use of the NurbsSurface node (texCoord not supported yet). <br><br> To view NurbsSurface nodes with the Cosmo Player browser you need to include this <a href=NurbsSurface.wrl>EXTERNPROTO declaration </a>in your VRML file (e.g. by using File -> import in white_dune).<br> Other Browsers with NurbsSurface support will fall back to their own (very much faster) implementation. <br><br> <a href=NurbsSurface_example.wrl>Click here</a> (and be patient till the accounting is ready) if you have the Cosmo Player browser (at least the version 2.1.5 on IRIX or version 2.1.1 on M$Windows work) to see a example of the usage of the NurbsSurface EXTERNPROTO. </p> </body>
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