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Viewing Reference Coordinates (VRC)--1

• View reference point (VRP): Local origin on the plane
  
  

• View up vector (VUP) indicates the orientation of the projection plane around the VPN
  
  
  

  • v is (unit) projection of VUP on view plane
    

  • is parallel to VPN
    

• is , to form right-handed coordinate system

Viewing History - 10 MAY 95

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