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  1. .TH CDERIVE
  2.  6 "IRIT Version 6.0" 
  3. .SH NAME
  4. CDERIVE
  5.  
  6.  
  7.  
  8.  CurveType CDERIVE( CurveType Curve )
  9.  
  10. Returns a vector field curve representing the differentiated curve,
  11. also known as the Hodograph curve.
  12.  
  13. Example:
  14.  
  15.  Circ = circle( vector( 0.0, 0.0, 0.0 ), 1.0 );
  16.  Hodograph = CDERIVE( Circ );
  17.