Microsoft KB Archive/173035

HOWTO: Tips for Achieving Detail When Modeling NURBS

PSS ID Number: Q173035 Article last modified on 08-26-1997

IRIX:3.51,3.7; WINDOWS NT:3.51,3.7

IRIX NT WINDOWS

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The information in this article applies to:

 Softimage 3D for IRIX, versions 3.51, 3.7 == Softimage 3D for Windows NT, versions 3.51, 3.7 == 

= SUMMARY =

This article provides two methods for moving points on a NURBS surface. If your model does not require fine detail, the Edit>Nurbs Weight command is useful. If you do wish to achieve a fine degree of detail the following two methods are recommended:

Lockdown command
You can use the Lockdown custom effect to lock the Nurbs surface points that you do not want manipulated. Then, transform the unlocked points (remember to use the ‘r’ key to refresh the scene).

Create Cluster groups
You can also create Cluster groups on different parts of the Nurbs surface. Check the “Create Cluster Center” option in the Set Cluster dialog box. Then position Constrain the Cluster center to a Primitive Null located in the same area as the Cluster Center. Apply Position (and Rotation) Limits constraints to the Primitive Null. Now you can transform other Cluster groups or surface points without affecting the area that contains the Position (and Rotation) Limits constraints.

= REFERENCES =

Softimage 3D Reference Guide: A to H, Appendices page 605.

Softimage 3D Reference Guide: I to Z, Appendices page 1382

Softimage 3D Reference Guide: A to H, Appendices page 215

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

= Additional query words: si si3d si3dmod si3dconst =

Keywords : kbgraphic Version : IRIX:3.51,3.7; WINDOWS NT:3.51,3.7 Platform : IRIX NT WINDOWS Issue type : kbhowto ============================================================================= Copyright Microsoft Corporation 1997.