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Viewing controller for three-dimensional computer graphics

  • US 20030189567A1
  • Filed: 04/08/2003
  • Published: 10/09/2003
  • Est. Priority Date: 04/08/2002
  • Status: Abandoned Application
First Claim
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1. A method of controlling the view of a three-dimensional computer model from a virtual camera, the method being performed by a processing apparatus and comprising:

  • receiving user instructions to change the view; and

    rotating the virtual camera and computer model relative to each other in accordance with the user instructions and performing additional control of the relative rotations such that;

    whenever the viewing direction of the camera and the up axis of the computer model are perpendicular, the up axis of the computer model is constrained to be parallel to the camera up axis;

    but whenever the viewing direction of the camera and the up axis of the computer model are parallel, no additional control of the relative rotations is performed.

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