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Microsoft KB Archive/173033

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HOWTO: Rotate the Camera Freely on Its Own Center

PSS ID Number: Q173033 Article last modified on 08-26-1997

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



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 ==


This article provides a method for constraining the camera interest to the camera so that you can rotate the camera freely about its own center.


To constrain the camera interest to the camera so that you can rotate the camera freely about its own center, follow these steps:

  1. Load a Primitive Cube and a Primitive Null.
  2. In the Top window, tag the top row of points of the cube.
  3. Choose Tag -> Set Cluster, and activate the “Create Cluster Center” option (Cluster Center #1). Click OK to exit.
  4. Repeat step 2, but tag the bottom row of points of the cube (Cluster Center #2).
  5. Select the camera, and constrain it in position to the first Cluster Center.
  6. Select the camera interest, and constrain it to the second Cluster Center.
  7. Select the Primitive Null, and translate the Null, 1 or 2 units, on the positive y-axis above the cube.
  8. Select the camera, and constrain the camera interest in Up Vector to the Null.

Now, you can select the entire branch consisting of the Parent cube and its children (the Cluster Centers and the Null), and transform the branch to translate or rotate the camera.


Softimage 3D Reference Guide: A to H, Appendices page 220.

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

Additional query words: si si3d si3dcam

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.