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View Volumes in the VRC System

• View Volume (visible part of the world) defined by:

  • window on view plane

  • center of Projection (COP) for perspective projection

  • direction of Projection (DOP) for parallel projection

  • projection Reference Point (PRP)

  • and Center of Window (CW)

• PRP and CW are used to determine COP and DOP

  • perspective: COP = PRP

  • parallel: DOP = CW - PRP
    
    

Viewing History - 10 MAY 95

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