Microsoft Knowledge Base

How To Convert Quadratic NURBS to Cubic NURBS
Last reviewed: June 25, 1996
Article ID: Q152588
The information in this article applies to:
  • Softimage 3D for Windows NT, versions 3.00 and 3.01
  • Softimage 3D for IRIX, versions 3.00 and 3.50

SUMMARY

It is possible to convert a Quadratic NURBS curve to a Cubic NURBS curve.

MORE INFORMATION

Successfully convert a Quadratic NURBS curve to a Cubic NURBS curve as follows:

  1. Convert a Quadratic NURBS curve to a B-Spline. Make sure to keep the
control points.

NOTE: This function works poorly if Keep Curve is selected in Effect -> Convert so be sure to select Keep Control Points instead.

  1. Convert back to NURBS. The scaling is slightly off, but good results
are possible after only slight tweaking.

REFERENCES

For Softimage 3D, version 3.5 as follows:

Reference Guide: A to H Interface, pages 432-436 describe the Effect -> Convert function.

If you have any questions concerning the information contained in this article, contact support@softimage.com by email.

NOTE: Softimage Inc. is a wholly owned subsidiary of Microsoft Corporation.

Additional reference words: 3.00 3.01 3.50
KBCategory: kbgraphic kbhowto
KBSubcategory: si si3d si3dmo

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last reviewed: June 25, 1996
©1997 Microsoft Corporation. All rights reserved. Legal Notices.