Ex parte CRANE et al. - Page 2




          Appeal No. 96-2994                                                           
          Application 08/282,413                                                       


                                  DECISION ON APPEAL                                   
                                                                                      
          This is a decision on the appeal under 35 U.S.C. § 134                       
          from the examiner’s rejection of claims 1-26, which constitute               
          all the claims in the application.  An amendment after final                 
          rejection was filed on June 2, 1995 and was entered by the                   
          examiner.                                                                    
          The disclosed invention pertains to a method and                             
          apparatus for modeling the relative position and the relative                
          movement of plural objects located in a virtual reality                      
          environment.                                                                 
          Representative claim 1 is reproduced as follows:                             
               1.   A method of modeling relative position and relative                
          movement of objects in a virtual reality environment,                        
          comprising the steps of:                                                     
               representing graphically a first object and a second                    
          object in the virtual reality environment on a graphical                     
          display;                                                                     
               determining a first partitioning plane between said first               
          object and said second object;                                               
               determining a second partitioning plane between said                    
          first object and said second object in response to either of                 
          said first object or said second object moving across said                   
          first partitioning plane; and                                                
               representing graphically on said graphical display in                   
          response to said second partitioning plane determining step                  
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